VS
Name
—
(Ca,Na, )₁₉Ti₈Fe³⁺₄Fe²⁺₄(AsO₃)₂₈F
Formula
—
Mineral Species
Entry type
—
Arsenates
Chemical class
—
Cubic
Crystal system
—
5.5–6
Mohs hardness
—
3.9
Specific gravity
—
Yellow-brown
Streak
—
—
Luster
—
—
Cleavage
—
Pn3
Space group
—
—
Structural group
—
Caf · Approved
IMA
—
1965
Named in
—
Dark brown; red in transmitted light
Typical colors
—
Ca · Na · Ti · Fe · As · O · F
Elements
—