Wagnerite is a mineral, a combined phosphate and fluoride of iron and magnesium, with the formula (Mg,Fe2+)2PO4F.[2][3] It occurs in pegmatite associated with other phosphate minerals.[4] It is named after Franz Michael von Wagner (1768–1851), a German mining official in Munich.[2]
Wagnerite | |
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General | |
Category | Phosphate mineral |
Formula (repeating unit) | (Mg,Fe2+)2PO4F |
IMA symbol | Wag[1] |
Strunz classification | 8.BB.15 |
Dana classification | 41.6.2.1 |
Crystal system | Monoclinic |
Crystal class | Prismatic (2/m) |
Space group | P21/a’’ |
Identification | |
Color | Yellow, grayish, red, reddish brown, brown, green |
Crystal habit | Elongate and striated prisms, tabular, massive |
Cleavage | {100} imperfect, {120} imperfect |
Fracture | Sub-conchoidal, splintery |
Tenacity | Brittle |
Mohs scale hardness | 5–5.5 |
Luster | Vitreous, resinous |
Diaphaneity | Translucent, nearly opaque |
Specific gravity | 3.15 |
Density | 3.15 (measured), 3.15 (calculated) |
Optical properties | Biaxial (+), colorless (transmitted light) |
Pleochroism | None |
2V angle | 25°–35° (measured) |
Solubility | Soluble in acids |
References | [2][3][4] |