NEW MINERAL NAMES* JonN L. J,mnnon Enw.lno S. Gnrw Anonrw C. Ronnnrs

Page 1

American Mineralogist, Volume 79, pages 1210-1214, 1994

NEW MINERAL NAMES*

JonN L. J,mnnon

Department of Earth Sciences, University of Waterloo, Waterloo, Ontario N2L 3Gl, Canada

Enw.lno S. Gnrw

Department of Geological Sciences, University of Maine, Orono, Maine 04469, U.S.A.

Anonrw C. Ronnnrs

Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario KIA 0E8. Canada

Clinobirnessite

A.I. Gorshkov, V.A. Drits, V.S. Putilina. E.V. Pokrov-

skaya, A.V. Sivtsov (1992) Natural and synthetic bir-

nessites. Litol. Polezn. Iskop., no.6,67-81 (in Russian;

English transl. in Lithology and Mineral Resources, 27,

503-s l4).

The existence of natural monoclinic and hexagonal bir-

nessite was described by Manceau, Gorshkov, and Drits

in Am. Mineral., 77 , 1144-1157 (1992). Structural inter-

pretation of electron diffraction patterns indicates that

the cell for monoclinic birnessite has a : 8.54, b: 15.39,

c: 7 A, P: 132.2.In addition, a structural modification

occurs with a: 10.44, b: 8.76, c: =14 A, 7 : ll0";

it is single-layered triclinic or double-layered monoclinic,

has an orderly distribution of vacancies, and is referred

to as clinobirnessite.

Discussion. To date, the only approved name, which

includes all structural types, is birnessite. J.L.J.

Hunchunite*

Shangquan Wu, Yi Yang, Qun Song (1992) A new gold

mineral-hunchunite (AurPb). Acta Mineral. Sinica,

I2(4),319-322 (in Chinese, English abs.).

Seven electron microprobe analyses gave Au 63.38-

66.26, Ag 1.68-2.96, Pb 31.60-34.64, sum 99.54-99.98

wto/0, close to AurPb. Occurs as anhedral granular aggre-

gates, 170-500 x 3-30 rrm, intergrown with gold, an-

yuiite, and lead in gold concentrates from Quaternary

alluvial placers along the Hunchun River, eastern Jilin

Province, China. Opaque, metallic luster, 11, : 128-149

kg/mm2, D"",. : 15.99 g/cm3 for Z : 8. Silver gray color

in reflected light, tarnishes to dull gray in lt/z-2 d; isotro-

pic; reflectance percentages in air (WC standard) are 40.9

(405 nm), 48.8 (436), 58.4 (480), 57.9 (526),59.s (546),

60.0 (589), 64.0 (644), and 60.0 (656). Cubic by analogy

with synthetic AurPb (PDF 28-436), with which rhe X-ray

powder pattern (Cu radiation) is in good agreement; space

group Fd3m, a : 7 .933 A. Strongest lines of the parrern

are 2.8 | 0(30,220), 2. 39 I ( I 00, 3 | l), 2.30 | (24,222),

* Before publication, minerals marked with an asterisk were

approved by the Commission on New Minerals and Mineral

Names, International Mineralogical Association.

1.526(23,51l), and 1.196(26,622). The new name alludes

to the type locality, along the Hunchun River. Type ma-

terial is in the National Geological Museum (in Beijing?).

Discussion. The average of the seven microprobe anal-

yses is Au 64.78, Ag 2.18, Pb 32.91, sum 99.87 wto/0,

corresponding to Au, ,oAg ,rPbo.no for two formula atoms.

J.L.J.

Szenicsite*

C.A. Francis, L.C. Pitman, D.E. Lange (1994) Szenicsite,

a new mineral from Tierra Amarilla, Chile. Mineral.

Record, 25(l), 76.

Electron microprobe analysis and TGA gave CuO 56.25,

MoO. 34.00, HrO 8.99, sum 99.24 wt0/0, corresponding to

Cur,,(MoOo)(OlI)0,,, ideally Cu.(MoOo)(OH)n. Occurs as

fracture fillings and freestanding dark green bladed crys-

tals to 3 x I x 0. I cm; crystals are elongate [001], with

dominant tl00) and common {010}, typically in radial

aggregates. Adamantine luster, 11 : 3.5-4, D^".,: 4.26,

D,",.: 4.30 g/cm3 for Z : 4. Optically biaxial positive, a

: 1.886(2), A : 1.892(2), 7 : 1.903(2), 2V^"

: 74(3),

2V*r:73", nonpleochroic, X: b, Y: L, Z: c, strong

dispersion r > v. Orthorhombic, space group Pnnm, a:

8.449(3), b -- 12.527(6), c : 6.067(l) A. Strongest lines

of the powder pattern (diffractometer) are 5.057(48,120),

3.759(100, t30), 2.77 3(57,3 10), 2.59r(67,320), and

2.132(3r,400).

The mineral was derived by the oxidation of bornite

and molybdenite and is associated with powellite, chryso-

colla, brochantite, hematite, and quartz from a mine near

Tierra Amarilla, Atacama, Chile. The new name is for T.

and M. Szenics, the finders of the mineral.

Discussion. Our general policy is not to write abstracts

ofabstracts, but an exception is made in this case because

the description is relatively complete. The authors' insti-

tution is the Harvard Mineralogical Museum, presum-

ably the repository for the type material. J.L.J.

Tetrarooseveltite*

J. Sejkora, T. RidkoSil (1994) Tetrarooseveltite,

B-Bi(AsOo), a new mineral species from Moldava de-

posit, the Kru5ni Hory Mts., northwestern Bohemia,

Czech Republic. Neues Jahrb. Mineral. Mon., 179-184.

0003-004x/94ll I I 2- 1 2 l0$02.00

l210

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JAMBOR ET AL.: NEW MINERAL NAMES

tztl

The mineral consists of grains up to 50 pm in diameter

that form powdery aggregates up to l0 mm in diameter

on fluorite and barite. White to yellowish color, earthy

luster, nonluminescent, soluble in cold HCl, D".," : 7.64

g,/cm' for Z : 4. Optically uniaxial positive, mean n :

2.20(5). Electron microprobe analysis (average of six) gave

Bi2O3 66.96, AsrO, 33.02, P,Os 0.03, sum 100.01 wt0/0,

corresponding to Bi(AsOo). The X-ray powder pattern is

in good agreement with that of synthetic tetragonal

Bi(AsO"), and by analogy a : 5.085(5), c : ll.69Q) A,

space group 14,/a; strongest lines ofthe pattern (13 lines

given; diffractometer, Cu radiation) are 4.660(ll,l0l),

3.066(100,1 12), 2.546(12,200), 1.933(55,204; overlaps

fluorite), t.7 97 (l 1,220), 1.58 I( I 0, I 07), and 1.55 I( I 7,3 I 2).

The mineral occurs as an oxidation product associated

with bayldonite, malachite, and mimetite in a fluorite +

barite + quartz vein in the Moldava Bi-Ag-As-Co-Ni de-

posit near Teplice, Czech Republic. The name alludes to

the tetragonal symmetry and polymorphism with roose-

veltite (monoclinic). Type material is in the N6rodni Mu-

seum, Praha (Prague). J.L.J.

Au(Te,Tl), Cur(Bi,Tl)Sn

S.V. Nechaev, S.N. Bondarenko (1993) Thallium min-

erals in the Ukranian Shield. Mineral. Zhurnal, l5(l),

75-79 (in Russian).

Electron microprobe analyses gave Au 56.54, 56.32,Te

22.72,21.65, Tl 18.19, 19.83, sum 97.44,97.80 wto/o,

corresponding to Au(Teo uoTlo ,r)- ,u. Microprobe analysis

of another mineral gave Tl 16.0, Cu 23.8, Fe 0.7,81 42.2,

Ag 0.4, Pb 0. I, S 16.0, Te 0. l, Se 0.2, sum 99.5 wto/0,

corresponding to (Cur rrFeo r)"2 e8OIi, rTlo u)", ,rS. ro, sim-

plified as Cur(Bi,Tl)rSo. The minerals occur with Bi and

Sb sulfosalts and thalcusite in scheelite-bearing skarns of

the Kamensk deposit in the Ukranian Shield. J.L.J.

(Pd,Ft)nsb3o (Pd,Cu)rSb, (Pd,Rh)r(Sb,As), (Rh,Ir)SbS,

(Ni,Fe,Rh)S, (Rh,Pt),(Fe,Ni)rS,

T.L. Evstigneyeva, A.S. Kudryavtsev, N.S. Rudashevskiy

(1992) Minerals of the platinum-group elements from

Yubdo (Ethiopia): New data. Mineral. Zhurnal, l4(l),

29-41(in Russian).

The unnamed minerals were found in the heavy con-

centrates from placers of the Yubdo platinum deposit,

middle course of the Birbir River, eastern Welega Prov-

ince, Ethiopia. The predominant minerals in the heavy

concentrates are isoferroplatinum, tetraferroplatinum, and

nickelian tulameenite. Closely associated minerals in-

clude Os-Ir-Ru-Pt-Rh alloys (e.g., Os, Ir), sperrylite, ir-

arsite, hollingworthite, erlichmanite, laurite, and stibio-

palladinite. Gold, cubanite, bornite, chalcopyrite, galena,

chromite, and magnetite are also found in the heavy frac-

tion. The material rich in Pt, Ir, and Os is inferred to

have had a magmatic origin and subsequently altered un-

der hydrothermal and near-surface (during laterization)

conditions. The minerals reported here are inferred to

have formed during the concluding part the hydrothermal

metasomatic stage.

(Pd,Ft)4Sb3

Electron microprobe analysis gave Pt 13.40, Pd 58.60,

Ir 0.15, Rh 0.20, Cu 0.75, Fe 0.05, Sb 58.60, As 0.29,

sum 98.74 wto/0, corresponding to (Pdr.o3Ptoorcuooi)", ersb3 0r,

that is, a possible Pd analogue of genkinite. The mineral

occurs as inclusions up to l0 pm in a highly fractured

grain of isoferroplatinum.

(Pd,Cu),Sb

Electron microprobe analysis gave Pt 0.91, Pd 71.30,

Ir 0.05, Rh 0.07, Cu 1.30, Fe 0.03, Sb 28.00,8i0.27,

sum 101.93 wto/0, corresponding to (PdrrrCuoor)"rnuSb, o.

The mineral occurs as inclusions up to 10 pm ln an un-

fractured isoferroplatinum matrix in which stumpflite was

also found.

(Pd,Rh),(Sb,As)

Electron microprobe analysis gave Pt 0.90, Pd 36.20,

Ir 0.03, Rh 30.50, Ru 0, Cu 0.04, Fe 0.07, As 11.90, Sb

19.70, Bi 0.36, sum 99.70 wt0/0, corresponding to

(Pdr 06Rhor2Pt00r)", eesbos.Asoor. A segregation ('20 pm)

of the mineral is enclosed with hollingworthite and sti-

biopalladinite in an isoferroplatinum grain; Ir-Os alloys

and tulameenite are nearby.

(Rh,Ir)SbS

Electron microprobe analysis gave Pt 1.90, Ir 27.00,

Rh 16.87, Ru 0.08, Fe 0.01, As 0.98, Sb 43.33, S 9.71,

sum 99.88 wto/0, corresponding to (Rho rrlro orPto or)",.0r-

Sb,or(SorrAsoo3)"0"6, that is, a possible Rh analogue of

tolovkite, with which it might form an isomorphous se-

nes.

(Ni,Fe,Rh)S

Four electron microprobe analyses of Rh-rich varieties

gave the following ranges: Pt 0.70-1.20, Ir 6.54-7.21, Rh

26.50-28.20. Fe 15.60-17.80, Ni 10.10-l1.60, Cu 4.05-

4.71, Co 0.08-l.l l, S 31.80-32.10, sum 99.72-100.39

wto/0, corresponding to (one example) (FeoroRhornNior'-

Cuo.orlro*Cooo2Pt00r)>oe4sr

06. An Ir-rich variety gave Pt

2.50, Ir 19.40, Rh 16.20, Fe 12.20, Ni 13.10, Cu 4.96,

Co 0.63, S 30.20, sum 99.19 wto/0, corresponding to

(Nio ,uFeo ,rRho ,rlro ,rCuo orPto or)- ,rS, o. per 2 apfu. In re-

flected light, brown with an olive tint. Forms segregations

up to 70 pm across in fractures and cavities in Pt-Fe

alloys, (e.g., isoferroplatinum) and encloses l5-pm crys-

tals of rhodian pentlandite. Erlichmanite and Os-Ir-Pt

alloys also are present.

(Rh,Pt Ir)r(Fe,Ni,Cu).S'

Electron microprobe analysis of a single grain gave Pt

20.66,Ir 6.14, Rh 21.23, Cu 2.48, Fe 9.40, Ni 8.55, S

29.89, sum 98.35 wto/0, correspondingto (Rho.rrPtooulro 'o-

Page 3

t2t2

JAMBOR ET AL.: NEW MINERALNAMES

Feo_r.NiourCuo,r)rr_oSoo.

The mineral occurs in an isofer-

roplatinum grain and resembles platinum thiospinels.

Discussion. Pdrsb3 has also been reported to occur in

Australia (abs. in Am. Mineral., 78, p.848 and llll,

1993). For previous reports of possible RhSbS, see Am.

Mineral.,76, 1216-1217, 1989, and 78, p. llll, 1993.

(Ni,Ir,Fe)S has been reported from the Thetford mines,

Quebec (abs. in Am. Mineral., 76, p. 1437, l99l).

(Rh,Pt,Ir)3(Fe,Ni,Cu)rS, seems to differ from the possible

Fe analogue of cuprorhodsite, FeRhrSo. X-ray study is

needed to clarifu the nature of all these unnamed min-

erals. E.S.G.

(Pd,Cu)rTer, (Pd,AgNi)rTeo, (Pd,Ni)nAs,

R. Petrunov, P. Dragov, G. Ignatov, H. Neykov, Ts. Il-

iev, N. Vasileva, V. Tsatsov, S. Djunakov, K. Don-

cheva (1992) Hydrothermal PGE mineralization in the

Elacite porphyry copper deposit (the Sredna Gora met-

allogenic zone, Bulgaria). Doklady Bulg. Akad. Nauk.,

4s(4),37-40.

The minerals occur in a fault zone up to 150 m wide

in the main bornite + chalcopyrite + pyrite assemblage

that forms the bulk of the commercial ore. The PGM and

various sulfides and tellurides occur predominantly as

grains of l-20 1rm; merenskyite (to 70 lrm) is the most

common of the PGM, and palladoarsenide is present as

fewer and smaller grains. Also present are rammelsber-

gite, with 18.45 wtolo Pd, and sparse amounts of three

unnamed minerals as follows.

(Pd,Cu),Te,

Electron microprobe analysis gave Pd 27.38,Pt 0.39,

Fe 0.64, Cu 4.55, Te 65.45, Bi 0.83, S 0.75 wto/0, corre-

sponding to (Pd, ,Cuo oFeo ,)r, o(Te, nSo r)"3 0. White with a

faint creamy tinge in reflected light, slightly anisotropic;

reflectance close to that of merenskyite.

(Pd,Ag,Ni).Teo

Microprobe analysis (some interference from chalco-

pyrite) gave Pd 16.57, Ni 3.14, Fe 0.47, Ag 16.06, Cu

1.21 , Te 61.91, S 0.65 wto/0, corresponding to

(Pd, rAg, rNiooCuo,Feo,)"...(TerrSor)"o0.

Blue- to brown-

tinged gray color in reflected light; strongly anisotropic,

with polarization colors from brown to gray; reflectance

similar to that of weissite.

(Pd,Ni,Ag)nAs,

Microprobe analysis gave Pd 61.95, Ni 1.10, Ag 1.48,

Te 1.77, As 33.70 wto/0, corresponding to (Pdrr.Nio,r-

Ag or)r, nr(As, nrTeo or)r, 0,. In reflected light, creamy pink,

moderately anisotropic, reflectance between those of py-

rite and chalcopyrite.

Discussion. PdoAs, has also been reported to occur in

the Zechstein Cu deposits (Am. Mineral., 74, p. 1219,

1989). J.L.J.

BirAuSo, (Bi,Pb)rAuSo, (Bi,Pb)uAuSo, (Bi,Pb).AuS,

(Bi,Pb)uAuS., (Bi,Au)oSr, (Bi,Au,Pb)uS.

Z.N. Pavlova, V.L. kvin, B.M. Tasov (1991) New forms

of occurrence of gold and bismuth in a copper-gold ore

deposit of Kazakhstan. Izvest. Akad. Nauk Kazakhs-

koy SSR, l99l(3), 63-68 (in Russian).

The bismuth gold sulfides occur with arsenopyrite in

low-sulfide quartz veins that cut hydrothermally altered

diorites (locally, basic effusive rocks) in northwestern Ka-

zakhstan. These sulfides, although not overly rare in this

ore type, form grains not exceeding a few micrometers in

diameter (maximum 30 x 50 pm). Bismuth gold sulfides

free of Pb are intergrown with BirTe, ,Sor, galena, native

bismuth, and gold; less commonly with lead bismuth sul-

fosalts, cosalite, and maldonite. The bismuth gold sul-

f,des, as well as the Au-Te-Bi mineral association as a

whole, formed at the end of the hydrothermal process

after arsenopyrite and the main mass of iron copper zinc

sulfides. In reflected light, the bismuth gold sulfides (ex-

cept those containing little Au) look the same and resem-

ble cosalite and bismuthinite, differing from these by be-

ing pinkish or purplish (one nicol) and brownish to reddish

(crossed nicols). Reflectances (R,, Rr) are plotted from tr

: 440 to 740 nm for Bi,AuSo, (Bi,Pb),AuSo, (Bi,Pb).AuSo,

(Bi,Pb)rAuS., and (Bi,Pb)uAuSr. Hardness suggested by

relative relief is greater than that ofjos6ite (90 kglmm,)

and galena (60-l 10), and less than that ofcosalite (160).

BirAuSo

Electron microprobe analyses (average of five, pluses

and minuses are deviations from the average) gave Bi

76.6, Au 13.8 (+0.9, - 1.7), S 9.5 (+0.4, -0.4), sum 99.9

wt0/0, corresponding to Bi, ooAuo nrSo or.

(Bi,Pb)rAuSo

Electron microprobe analyses (average of 12) gave Bi

68.0, Pb 6, Fe 0.7, Au 14.9 (+0.5, -0.6), S 9.8 (+0.3,

-0.4), sum 99.4 ,xto/o, corresponding to (Bior.Pborr-

Feo ,.)* nrAu, ooSo or.

(Bi,Pb)uAuSo

Electron microprobe analyses (average of two) gave Bi

66.0, Pb ll,Fe 1.2, Au 13.2 (+0.1, -0.1), S 8.0 (+0.1,

-0.2), sum 99.4 wto/o, corresponding to (BionrPbor,-

Feo ,r)ru ouAu, orS, ,n.

(Bi,Pb).AuS.

Electron microprobe analyses (average of three) gave

Bi 67.6, Pb 10, Fe 0.6, Au 14.3 (+0.2, -0.3), S 7.4

(+0.4, -0.5), sum 99.9 wto/0, corresponding to

(BioruPbounFeo,,)rrouAuoruSrrr.

Of the ll X-ray diffrac-

tion lines obtained with a camera, only three are given:

2.405(50), 2.07 4(100), 1.8 10(30).

(Bi,Pb).AuS.

Electron microprobe analyses (average of two) gave Bi

67.3,Pb I l, Fe 0.8, Au 13.6 (+0.2, -0.1), S 6.6 (+0.3,

Page 4

- 0. 3), sum 99 .3 wlo/o, corresponding to @io rfbo roFeo rrL rr-

Au, *Sror.

(Bi,Au)oS.

Electron microprobe analysis gave Bi 73.8, Au 4.6, S

14.9, sum 93.9 u,lo/o, corresponding to (BirrrAqrr)-orSorr.

In reflected light next to gold it resembles covellite in

being bluish gray but differs by lacking anisotropic red

colors.

(Bi,Au,Pb)uS,

Electron microprobe analysis gave Bi 78.8, Pb 4, Fe

0.7, Au 9.3, S 7.7, sum 100.5 wto/o (Co not given), cor-

responding to (Bio ,rAuo u, Pbo ,oFeo ,rCoo oo)", n, S, on. Al-

most identical to bismuthinite in reflected light.

Discussion. The low total for (Bi,Au)oS, suggests that

one or more constituents may have been overlooked dur-

ing analysis of this compound. BirAuSo and (Bi,Pb)rAuSo

have been reported from other localities (Am. Mineral.,

75, 434-435, 1990) and may be related by an isomor-

phous Bi = Pb substitution. E.S.G.

(Co,Ni,Fe,Cu)AsS

L.Ye. Gertsen, P.Ye. Kotel'nikov, Ye.Ya. Yeremeyeva

(199 l) Rare minerals of the Koksay porphyry copper

ores. Izvest. Akad. Nauk Kazakhskoy SSR, Ser. Geol.,

1.99 l(4), 5 I -58 (in Russian).

Electron microprobe analysis gave Cu 2.10, Fe 9.49,

Co 12.78, Ni 12.65, 4s44.73, S 18.51, sum 100.26 wt0/0,

corresponding to (Coo.rNio rrFeo rrCuo ou)", ,oAsS. Color is

pinkish white; isotropic. Reflectance increases monoton-

ically from 42 to 5lo/o with increasing wavelength from

440 to 740 nm, whereas that of cobaltoan gersdorffite

from Koksay is mostly 40-45o/o for 440-740 nm (reflec-

tances estimated from plots). The mineral forms tabular,

xenomorphic grains l-6 pm in diameter, intergrown with

tennantite and enclosed in chalcopyrite in copper min-

eralization in the pre-Silurian Koksay intrusion, Dzhun-

gar area, eastern Kazakhstan.

Discussion. The mineral is distinct from gersdorffite in

that Co > Ni and Co > Fe, but X-ray study is needed to

confirm the isometric symmetry and distinction from co-

baltite, alloclasite, and glaucodot. E.S.G.

Nar.rrCa".rrYr.zsREEo 24F6

Yu.K. Kabalov, Ye.V. Sokolova, A.P. Grigor'yev (1993)

Determination of the crystal structure of the new min-

eral Na, rrCao,rY,2sTRo24F6 by the Rietveld method.

Doklady Akad. Nauk, 330(6), 713-715 (in Russian).

Electron microprobe analysis (wto/o not stated) gave the

formula Na, oo Cao r, (Y, o, Lao o, Ceo.o, Pro o, Ndo or Stllo o,-

Gdo.ooTboorDyo,rHooorEro.,oYbo.or)",

onF., ideally

(Na,Ca), 5(Y,REE) r,Fu. The mineral typically forms grains

up to 0.5 mm in diameter intergrown with quartz. Col-

JAMBOR ET AL.: NEW MINERALNAMES

t2t3

orless, or locally with delicate rose color. Brittle, vitreous

luster, D-"". : 4.45 (method not specified), D"d. : 4.52

g/cm3 for Z : l. Optically uniaxial positive, e : 1.495, ot

: 1.475. Powder X-ray data and the Rietveld method gave

a : 5.9855(5), c -- 3.5469(4) A, space group P6r/m, and

structural formula Nao rr(Nao, rCao o.Yo uoCeo o, N4 o, G4 or -

Tbo o r Dyo o2Hoo o, Ero orYbo o)rFu. The mineral occurs with

riebeckite, astrophyllite, zircon, and pyrochlore in alkaline

qt:o;rtz + albite + microcline metasomatites of the Ar-

askan rare-earth deposit, south slope ofthe Sayan Range,

Russia.

Discussion. The mineral is inferred to be isostructural

with gagarinite-(Y) and related to it by an isomorphic

series NaCa(Y,REE)F.-Na, s(Y,REE), 5Fu. E.S.G.

K,(NHn)MgrCL.18H,O

M.G. Siemann (1994) Ammonium bearing carnallite

(KlNH")MgCl3.6HrOl in the salt mine Marie (Mor-

sleben). Neues Jahrb. Mineral. Mon., 97-100.

The mineral occurs as a precipitate associated with am-

monium-bearing carnallite in solution pools in the Marie

salt mine near Helmstedt, Germany. Chemical analysis

gave K 9.54, NHo 2.06,M9 8.82, Cl 39.2, (HrO)-. 39.9

wto/0, corresponding to Kr(NHo)MgrClr' l8HrO; also con-

tains 0.06-0.08 wto/o Br and about 0.150/o Rb. Occurs as

euhedral prismatic crystals, twinned parallel to elonga-

tion, brittle, conchoidal fracture, no cleavage, parting par-

allel to twinning, H : 2.5, D-*" : 1.531 g/cm3. Optically

biaxial, a : 1.480, 0: 1.482,7: 1.484. Orthorhombic

or monoclinic symmetry with P close to 90". The X-ray

diffractomer pattern has strongest lines of 3.8268(47),

3.3 1 78(100), 2.967 0(44), 2.8 I 65(4 l), 2.3464(39), and

| .9 9 9 8(23) A. .r.r,..r.

NaCaoBrO,n(OH)4'2HrO

N.A. Yamnova, Yu.K. Egorov-Tismenko, D.Yu. Push-

charovskii, S.V. Malinko, G.I. Dorokhova (1993) Crys-

tal structure of a new natural Na,Ca-hydroborate

NaCar[BnO,o(OH),] .2H,O. Kristallografiya, 38, 7l-7 6

(English transl. in Crystallogr. Rep., 38, 749-752, for-

merly Soviet Phys. Crystallogr.).

The mineral occurs with howlite and colemanite in

Miocene volcanic ash near the village of Bella Stena,

southwest of Belgrade, Serbia. Chemical analysis gave SiO,

0.12, A1,O,0.05, FerO.0.05, MnO 0.01, MgO 0.02, SrO

0.09, CaO 21.73, NarO 4.55, KrO 0.08, BrO3 60.53, HrO+

12.58, sum 99.97 wto/o, corresponding to NarO'4CaO'

9B,O..8HrO. Color white, light gray to light yellow, vit-

reous luster, translucent to transparent, H: 5.7, D-*":

2.24-2.29, D-,.: 2.34 g,/cm3 for Z: 4. Optically biaxial

negative, a: 1.532, B : 1.538, 7: 1.564,2V: 56.

Single-crystal X-ray structure study (R : 0.05 l) indicated

monoclinic symmetry, space group P2,/b, a: I1.503(7),

b : 10.53(l), c : 12.58(l) A, 'y : 99.48(7). J.L.J.

Page 5

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JAMBOR ET AL.: NEW MINERALNAMES

K-U vanadate

P. Piret, G. Hentschel, M. Deliens, E. Van Der Meersche

(l 993) A carnotitelike potassium-uranylvanadate from

the Schellkopf, Brenk, Eifel. AufschluB, 44, 291-294

(in German).

The mineral occurs as rosettes, rarely as tabular single

crystals, to 0. I mm, on the Schellkopf phonolite, or as-

sociated with phillipsite, calcite, or fluorite. Qualitative

electron microprobe analysis indicated the presence of K,

IJ, and V. Single-crystal X-ray study gave monoclinic

symmetry, space group P2,/a, a : 10.67, b : 8.283, c :

7.662 h, 0 : 102.8;the cell parameters are close to those

of M(UOr)(VO4),.4H,O compounds (M : Mn, Co, Ni)

which, however, are orthorhombic, space grovp Pnam.

Strongest lines of the powder pattem (Cu radiation, I l4-

mm camera) are 7 .47(10,001), 4.15(70,020),3.7 5(40,002),

3.6 l (30,02 l ), 3.27 (60,220), 3.r3(r0,22r), 3.0 l (608, l l 2;

probable interference from the strongest line of calcite),

and 2.836(10,221).The pattern is unlike that of carnotite.

J.L.J.

P analogue of molybdofornacite

E.H. Nickel, G.J. Hitchen (1994) The phosphate analog

of molybdofornacite from Whim Creek, Western Aus-

tralia. Mineral. Record. 25. 203-204.

The mineral occurs sparingly as tufts, to I mm, ofgeenish

yellow prismatic crystals up to 0.3 mm long and a few mi-

crometers wide. Electron microprobe analysis gave PbO 61.2,

CUO 10.5, MoO, 15.4, AsrO, 1.0, CrO3 0.8, GarOr 0.l, P,O,

9.5, (HrO)".," 1.2, sum 99.7 wto/o, corresponding to

Pb, o, Cuo n, (Moo, Aso ou Cro *Ga" o, )..r, (POo )o rn Or r, (OH),

ideally PbrCu(Mo,As,Cr)Oo (PO.)(OH). Refractive indi-

ces >2.0, length slow, high birefringence. The X-ray pow-

der pattern is similar to that ofmolybdofornacite; by anal-

ogy and refinement a : 8.05, b -- 5.91, c : 17.67 A, P :

109.7", D*" : 6.18 g,/cm3 for Z: 4' Stron1est lines (l l4-

mm camera, Cu radiation) are 3.308(100,212), 2.950

(5 0B,0 20), 2.8 | 4(40, | | 4), 2.7 26(40,20 3), 2.332(30,22O),

and 1.895(30,304). Occurs with numerous other second-

ary minerals in the gossan at the Whim Creek Cu-Zn-Pb-

Ag deposit, Pilbara region, northern Western Australia.

J.L.J.

New Data

Yingiiangite

JingyiZhang, Anwa Wan, Wenshu Gong (1992) New data

on yingiiangite. Acta Petrologica Mineralogica, ll(2),

178-184 (in Chinese, English abs.).

Chemical analysis of yingliangite from the Xiazhuang

uranium deposit, Guangdong Province, China, gave NarO

0.15, &O 3.37, MgO 0.10, CaO 2.00, MnO 0.03, Fe,O'

0.31, Tio,0.09, sio, 1.20, P,o5 10.50, uo3 75.42,H2O+

6.19, HrO- 0.25, sum 99.61 wto/o, corresponding to

K, noNao, rC% r, ([JOr)7 o, (POo)3 e3 (OH)6 16' 6.07HrO. Elec-

tron microprobe analysis and DTA gave similar results,

supporting the new formula (Kr,CaXUOr)'(POo)o(OH)6'

6HrO. Optically biaxial negative, 2V : 36-38o, d :

1.666(I), 0 : 1.703(2),7 : |.707(2). Single-crystal X-ray

study indicated orthorhombic symmetry, space group

Bmmb, a: 15.707(3), b : 17.424(3), c: 13.692Q) L;

D-.", : 4.54, D,nb -- 4'60 g,/cm3 for Z : 4. Strongest lines

of the diffractometer powder pattern (Cu radiation) are

r 0. 36( l 9, l 0 l ), 7. 89( l 00,200), 5.83(17,220), 3.94(50,400),

3. | 5 (29,20 4), 3.09 (r 4,0 5 2, 14 3), and 2.81 8(l 6,2 52). J.LJ.

Znucalite

P.-J. Chiappero, H. Sarp (1993) New data and the second

occurrence of znucalite. Archs Sci. Gendve, 46,291-

301 (in French, English abs.).

Occurs as spherules to 350 pm in diameter in the oxi-

dation zone of the Mas d'Alary uranium deposit near

Loddve, H6rault, France. Crystals are elongate [001] and

platy on (010), perfect {010} cleavage, nonluminescent,

soluble in HCl, D-..": 3.1, D*k: 3.15 g/cm3 for Z:2.

Electron microprobe analyses (range of 17) gave ZnO

51.16-56.60, CaO 3.29-3.76, UO3 r7.10-19.92. Opti-

cally biaxial negative, a : 1.556(2), B : 1.600(2), t :

1.620(2), 2Vu,: 50-60', 2V*n: 66, X : c, Y : \, /' :

a, parallel extinction. Partial single-crystal X-ray study

indicated orthorhombic symmetry, and the cell was in-

dexed with orthorhombic parameters a: 10.72(l), b:

25.16(l), c:6.325(4) A. Strongest lines of the powder

pattern are 25.2(100,010), 6.27(60,040), 6.13(70,01 l),

5.642(50,021), 2.949(50,032,122), 2.7 l8(7 0,360,280), and

2.702(90,190,271). The new cell and density lead to a

formula of CaZn,,(UO,XCO3)3(OH)','4H2O instead of the

original CaZn,(U O r)(CO3)3 (OH)r,' 4H 20 (A m. M i ne r al.,

76, t732-1733, l99l). J.L.J.

Erratum

Yol.79, p. 387: The correct name is antimonselite.