Wagnerite
From Wikipedia, the free encyclopedia
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 | |
|---|---|
| |
| General | |
| Category | Phosphate mineral |
| Formula | (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] |
