[CITATION][C] PETSCHECKIT U4+ (FE)(NB, TA) 2O8 UND LIANDRADIT U6+ (NB, TA) 2O8, ZWEI NEUE PEGMATIT-MINERALIEN VON MADAGASKAR.
A MUECKE, H STRUNZ - 1977 - pascal-francis.inist.fr
… Other title LA PETSCHECKITE U 4+ (FE)(NBTA) 2 O 8 ET LA LIANDRADITE U 6+ (NB,TA)
2 O 8 DEUX NOUVEAUX MINERAUX DES PEGMATITES DE MADAGASCAR (fr) …
2 O 8 DEUX NOUVEAUX MINERAUX DES PEGMATITES DE MADAGASCAR (fr) …
Liandratite from Karkonosze pegmatites, Sudetes, southwestern Poland
W Matyszczak - Mineralogy and Petrology, 2018 - Springer
… The A position is able to accommodate additional cations as happens in the isostructural
petscheckite U 4+ Fe 2+ (Nb,Ta) 2 O 8 . Hence, the chemical formula of liandratite is often …
petscheckite U 4+ Fe 2+ (Nb,Ta) 2 O 8 . Hence, the chemical formula of liandratite is often …
36th Rochester Mineralogical
C PEGMATITES - Canadian Mineralogist - search.proquest.com
[...] we conclude that (a) the P-rich samples are grayite and the Sirich samples may be either
a thorogummite-like mineral, a fine-grained intergrowth, or possibly a phase structurally …
a thorogummite-like mineral, a fine-grained intergrowth, or possibly a phase structurally …
Tables of mineral structure types
J Lima-de-Faria, J Lima-De-Faria - … of Minerals: Volume 2: Minerals with A …, 2003 - Springer
(", Auchecomite) TRIPLITE (Mn, Fe, Mg, cahoPJ04 (F, OH) 1 l2Ia VANDENBRANDEITE 2oo [CU
4nJU [7by! o2 (OH) 4] P" 1 VIRGILITE {3cO}[ShlAl'Li'os· TV.] P~ 22 (Inser. subs. dertv. …
4nJU [7by! o2 (OH) 4] P" 1 VIRGILITE {3cO}[ShlAl'Li'os· TV.] P~ 22 (Inser. subs. dertv. …
USA 122, 132 Boltwoodite, chemical and structural classification of 53, 54 Bolzano deposit, Italy 94 Bone Valley Formation, southeastern
E Lake, N Territory - … , Geology, Exploration and Resources: Published for …, 1984 - Springer
… vandenbrandeite 50 vandendriesscheite 50, 52 wolsendorfite 50, 52 brannerite 43, 47 coffinite
43, 46-7, 89 lermontovite 47 liandratite 48-9 ningyoite 47 orthobrannerite 47 petscheckite …
43, 46-7, 89 lermontovite 47 liandratite 48-9 ningyoite 47 orthobrannerite 47 petscheckite …
Mineralogy of niobium and tantalum: crystal chemical relationships, paragenetic aspects and their economic implications
P Černý, TS Ercit - … , Geochemistry, Characteristics of Primary Ore Deposits …, 1989 - Springer
… They are metamict, containing substantial quantities ofuranium oxides: petscheckite … In
both petscheckite and liandratite, heating restores a crystalline state resembling that of synthetic …
both petscheckite and liandratite, heating restores a crystalline state resembling that of synthetic …
[HTML][HTML] The Radioactive Rare Metal Mineralization in the World-Class Sn-Nb-Ta-U-Th-REE-Deposit Madeira (Pitinga, Amazonas State, Brazil): With Special …
IW Hadlich, AC Bastos Neto, VP Pereira, HG Dill… - Minerals, 2024 - mdpi.com
This study focuses on the relationship between U and pyrochlore in the world-class Sn-Nb-Ta
(U, Th, REE, Li) Madeira deposit within the Pitinga mining district of northern Brazil. The …
(U, Th, REE, Li) Madeira deposit within the Pitinga mining district of northern Brazil. The …
Pegmatite and Miarolitic Cavity Minerals of North Sugarloaf Mountain Bethlehem, New Hampshire
S Whittemore, B Janules - Rocks & Minerals, 1990 - Taylor & Francis
… This chemistry would seem to indicate the min eral petscheckite (U+ 4 Fe+ 2 (Nb,Ta)2 08
), but X-ray diffrac tion studies of heated material (900C, 3 hours, C 0 2 atmos phere) have …
), but X-ray diffrac tion studies of heated material (900C, 3 hours, C 0 2 atmos phere) have …
fra Herrebøkasa, Østfold
R Kristiansen - nags.net
Liandratitt eretmetamikt sekundært uran-mineral originalbeskrevet fra Madagaskar (Strunz
& Mticke 1978) forekommende som et belegg på petscheckitt. Et liandratitt-liknende mineral …
& Mticke 1978) forekommende som et belegg på petscheckitt. Et liandratitt-liknende mineral …
Geochemical alteration of pyrochlore group minerals: Betafite subgroup
GR Lumpkin, RC Ewing - American Mineralogist, 1996 - degruyter.com
Relatively low-temperature, secondary alteration is common in samples of metamict betafite
and initially proceeds by the substitution mechanisms A Na Y F → A ⃞ Y ⃞, A Ca Y O→ A ⃞ …
and initially proceeds by the substitution mechanisms A Na Y F → A ⃞ Y ⃞, A Ca Y O→ A ⃞ …