Wagnerite
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 (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] |
References
- Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
- Mindat - Wagnerite
- Webmineral - Wagnerite
- Handbook of Mineralogy - Wagnerite
Bibliography
- Palache, P.; Berman H.; Frondel, C. (1960). "Dana's System of Mineralogy, Volume II: Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. (Seventh Edition)" John Wiley and Sons, Inc., New York, pp. 845-847.
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