VS
Name
—
Na₃CaFe²⁺₁₁(PO₄)₉
Formula
—
Mineral Species
Entry type
—
Phosphates
Chemical class
—
Hexagonal
Crystal system
—
4.5
Mohs hardness
—
3.35
Specific gravity
—
Pale brown; gray-brown with an olive tint
Streak
—
Vitreous
Luster
—
Perfect, on {0001}, probable
Cleavage
—
—
Space group
—
Fillowite
Structural group
—
Jsv · Approved
IMA
—
1979
Named in
—
Very dark brown to blackish gray, pitch-black; brown in transmitted light
Typical colors
—
Na · Ca · Fe · P · O
Elements
—