[PDF][PDF] The simpsonite paragenesis: The crystal chemistry and geochemistry of extreme Ta fractionation
TS Ercit - 1986 - mspace.lib.umanitoba.ca
… matite i:as been studied as background to the setting of the simpsonite par- … Canon:ca1
variable histogram for microli:es from simpsonitebearing versus simpsonite-free associa:ions …
variable histogram for microli:es from simpsonitebearing versus simpsonite-free associa:ions …
Simpsonite and the Northern Brazilian pegmatite region
FH Pough - Geological Society of America Bulletin, 1945 - pubs.geoscienceworld.org
A study of the Alto do Giz, near Equador, Rio Grande do Norte, Brazil, reveals an interesting
series of tantalum minerals including the rare aluminum tantalate, simpsonite. Crystals of …
series of tantalum minerals including the rare aluminum tantalate, simpsonite. Crystals of …
Simpsonite and other tantalates from Bikita, southern Rhodesia
AM McGregor - Mineralogical magazine and journal of the …, 1946 - cambridge.org
… and several tons of tantalite and simpsonite concentrates have been exported to America. …
The discovery of simpsonite in a more consistent body has somewhat improved the working …
The discovery of simpsonite in a more consistent body has somewhat improved the working …
THE SIMPSONITE PARAGENESIS: THE CRYSTAL CHEMISTRY AND GEOCHEMISTRY OF EXTREME TANTALUM FRACTIONATION.
TS Ercit - 1987 - elibrary.ru
… a background study to the setting of the simpsonite paragenesis, and shows that enrichment
… of the simpsonite paragenesis. Crystallization histories of all occurrences of the simpsonite …
… of the simpsonite paragenesis. Crystallization histories of all occurrences of the simpsonite …
Simpsonite and stibiotantalite from Benson pegmatite mine, Mtoko, Southern Rhodesia
O Von Knorring, G Hornung - … and journal of the Mineralogical Society, 1963 - cambridge.org
… Optical, chemical, and powder X-ray data are given and the formula of simpsonite is considered
; a new formula is proposed. … The first find of simpsonite in Southern Rhodesia was from …
; a new formula is proposed. … The first find of simpsonite in Southern Rhodesia was from …
X-ray study of the tantalum mineral simpsonite
PF Kerr, RJ Holmes - Geological Society of America …, 1945 - pubs.geoscienceworld.org
… simpsonite, and in some instances the simpsonite is replaced. The Brazilian and African
specimens are apparently more nearly pure simpsonite … The formula of simpsonite is believed to …
specimens are apparently more nearly pure simpsonite … The formula of simpsonite is believed to …
V3.047O7, a new high-pressure oxide with the simpsonite structure
IP Zibrov, VP Filonenko, VA Sidorov, SG Lyapin - Inorganic Materials, 2016 - Springer
… simpsonite) [16, 17], which has not only interplanar spacings but also peak intensities identical
to those of the phase in question. Simpsonite … , the formula of simpsonite can be written as …
to those of the phase in question. Simpsonite … , the formula of simpsonite can be written as …
[PDF][PDF] THE CRVSTAL CHEMISTRY OF SIMPSONITE
C Mineralogist - Canadian Mineralogist, 1992 - rruff.geo.arizona.edu
… The examination of simpsonite was prompted by a … The present study of simpsonite from
seven of its nine known … Optically uniaxial negative, simpsonite has a hardness of 7th, an (<o) in …
seven of its nine known … Optically uniaxial negative, simpsonite has a hardness of 7th, an (<o) in …
[PDF][PDF] THE CRYSTAL STRUCTURE OF ALUMOTANTITE: ITS RELATION TO THE STRUCTURES OF SIMPSONITE AND THE (Al, Ga)(Ta, Nb) O. COMPOUNDS T …
C Minerologist - rruff.geo.arizona.edu
… At about this time, during a systematic study of simpsonite, we encountered a mineral …
Close inspection of other samples procured for the simpsonite study reveals a third locality …
Close inspection of other samples procured for the simpsonite study reveals a third locality …
[CITATION][C] The crystal structure of alumotantite; its relation to the structures of simpsonite and the (Al,Ga)(Ta,Nb)O 4 compounds
TS Ercit, FC Hawthorne… - The Canadian …, 1992 - pubs.geoscienceworld.org
The crystal structure of alumotantite; its relation to the structures of simpsonite and the (Al,Ga)(Ta,Nb)O
4 compounds | The Canadian Mineralogist | GeoScienceWorld …
4 compounds | The Canadian Mineralogist | GeoScienceWorld …