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Minerals - Stibiocolumbite | TerraCollect

Mineral - Stibiocolumbite

StibiocolumbiteSb(Nb,Ta)O₄

Chemical Properties

Mineral Class

Oxides and Hydrxides

Toxicity

none

Formula

Sb(Nb,Ta)O₄

Unit Cell

a=4,93 b=11,80 c=5,56 Z=4

Physical Properties

Hardness

5.5

Streak

brownyellowyellow brown

Optical Properties

Color

blackbrownorangeyellow

Birefringence

0,061

Luster

Adamantine,

Resinous

Transparency

translucent,

transparent

Pleochroism

Geomineralogical Properties

Crystal System

Composition

Elements

Mass

Nb₂O₅

37,30

Ta₂O₅

13,00

TiO₂

0,01

SnO₂

0,01

Bi₂O₃

0,53

Sb₂O₃

49,28

Kalifornien

Groups and Members

Cervantit-Gruppe

Density

Cleavage

Deutlich auf (001), undeutlich auf (100)

Fracture

conchoidal,

uneven

Tenacity

Brittle

orthorhombic

Point Group

Space Group

Habit

prismatic

Formation

Magmatisch, Granit-Pegmatite

Paragenesis

Twinning

Rarity

Very rare

Synonyms

Stibiocolumbite