VS
Name
—
Na(Pb,Na,K)₂(Ta,Nb,Ti)₄As₄O₁₈
Formula
—
Mineral Species
Entry type
—
Oxides & Hydroxides
Chemical class
—
Orthorhombic
Crystal system
—
5–5.5
Mohs hardness
—
6.2
Specific gravity
—
White
Streak
—
Adamantine
Luster
—
{010}, perfect
Cleavage
—
Ccmb
Space group
—
—
Structural group
—
Zbb · Approved
IMA
—
1984
Named in
—
Honey-yellow-brown; in transmitted light, pale yellow
Typical colors
—
Na · Pb · K · Ta · Nb · Ti · As · O
Elements
—