VS
Name
—
Sn²⁺Ta₂O₆
Formula
—
Mineral Species
Entry type
—
Oxides & Hydroxides
Chemical class
—
Monoclinic
Crystal system
—
6
Mohs hardness
—
7.6–7.9
Specific gravity
—
Brown to yellow, slightly greenish
Streak
—
Resinous to adamantine on the cleavage
Luster
—
{100}, perfect; {011}, imperfect
Cleavage
—
Cc
Space group
—
—
Structural group
—
Tre · Grandfathered
IMA
—
1933
Named in
—
Brown, red when altered; yellow in transmitted light
Typical colors
—
Sn · Ta · O
Elements
—