VS
Name
—
(Mn²⁺,Ca)Mn²⁺(Fe²⁺,Mn²⁺,Mg)₂(Al,Fe³⁺)₂(PO₄)₄(OH)₂·8H₂O
Formula
—
Mineral Species
Entry type
—
Phosphates
Chemical class
—
Monoclinic
Crystal system
—
3.5
Mohs hardness
—
2.81
Specific gravity
—
White
Streak
—
Vitreous
Luster
—
On {001}, indistinct
Cleavage
—
P2/a
Space group
—
Jahnsite
Structural group
—
Rit · Approved
IMA
—
1987
Named in
—
Very pale yellow to lemon-yellow, brownish yellow
Typical colors
—
Mn · Ca · Fe · Mg · Al · P · O · H
Elements
—