Fersmite R060717

Name: Fersmite
RRUFF ID: R060717
Ideal Chemistry: CaNb2O6
Locality: Lueshe carbonatite, Kivu Province, Democratic Republic of the Congo
Source: Michael Scott S101205 [view label]
Owner: RRUFF
Description: Dark brown coating on octahedral columbite crystals
Status: The identification of this mineral is not yet confirmed.
Mineral Group: [ Columbite (32) ]
Sample Description: Unoriented sample

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RRUFF ID: R060717
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
REFERENCES for Fersmite

American Mineralogist Crystal Structure Database Record: [view record]

Anthony J W, Bideaux R A, Bladh K W, and Nichols M C (1990) Handbook of Mineralogy, Mineral Data Publishing, Tucson Arizona, USA, by permission of the Mineralogical Society of America. [view file]

Bohnstedt-Kupletskaya E M, Burova T A (1946) Fersmite, a new calcium niobate from the pegmatites of the Vishnevye Mts., the Central Urals, Comptes Rendus (Doklady) de l'Académie des Sciences de l'URSS, 52, 69-71   [view file]

Fleischer M (1947) New mineral names, American Mineralogist, 32, 371-374   [view file]

Ismailzade I G (1958) Crystal structure of the niobiates and the tantalates of bivalent metals and their solid solutions, 22, 1480-1482

Yamnova N A, Tsomirova E S, Leonyuk N I (1993) Crystal structure of synthetic La-containig fersmite, Crystallography Reports, 38, 124-125

Gurbanova O A, Rastsvetaeva R K, Kashaev A A, Smolin A S (2001) Refined crystal structure of TR-fersmite (TR = Ce), Crystallography Reports, 46, 194-195

Škoda R, Novák M (2007) Y,REE,Nb,Ta,Ti-oxide (AB2O6) minerals from REL-REE euxenite-subtype pegmatites of the Třebíč Pluton, Czech Republic; substitutions and fractionation trends, Lithos, 95, 43-57

Chukanov N, Pasero M, Aksenov S M, Britvin S N, Zubkova N V, Yike L, Witzke T (2023) Columbite supergroup of minerals: nomenclature and classification, Mineralogical Magazine, 87, 18-33