betafite

Also known as betafite group, betafite mineral group

thumb|Betafite, Gunnison, Colorado

Key facts

Mineral.name: Betafite
Mineral.boxbgcolor: 73604c
Mineral.image: Betafite_octahedron.jpg
Mineral.caption: Betafite dodecahedron, Locality: Bancroft, Ontario, Canada
Mineral.category: Oxide minerals
Mineral.formula: (Ca,U)2(Ti,Nb,Ta)2O6(OH)
Mineral.IMAsymbol: Btf
Mineral.strunz: 4.DH.15
Mineral.system: Cubic
Mineral.symmetry: Fdm (no. 227)
Mineral.color: Brown, Black, Brownish green, Yellow, Greenish black
Mineral.habit: Massive - Granular
Mineral.cleavage: None
Mineral.mohs: 5 - 5.5
Mineral.luster: Vitreous
Mineral.streak: Yellowish white
Mineral.diaphaneity: Translucent to Opaque
Mineral.density: 3.7 - 4.9

via Wikipedia infobox

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Encyclopedic overview

4 sections

Contents

Structure
Origin and uses
References
External links

thumb|Betafite, Gunnison, Colorado

Betafite is a mineral group in the pyrochlore supergroup, with the chemical formula . Betafite typically occurs as a primary mineral in granite pegmatites, rarely in carbonatites. Originally defined by the B-site atom Ti, the development of new nomenclature for mineral names led to modernization of the system for nomenclature of pyrochlore and betafite in order to further rationalize the naming process of this grouping of minerals. Only two of the mineral species that were formerly recognized as betafite are presently retained. They are oxyuranobetafite and oxycalciobetafite. The term betafite is now a synonym or varietal group name under the pyrochlore super group. thumb|Betafite from Madagascar

Excerpted from Wikipedia’s “betafite” article, available under the CC BY-SA 4.0 licence.

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