Pyroxmangite
| Pyroxmangite | |
|---|---|
| 240px
Pyroxmangite from Chubu Region, Honshu Island, Japan
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| General | |
| Category | Inosilicate |
| Formula (repeating unit) |
MnSiO3 |
| Strunz classification | 09.DO.05 |
| Crystal symmetry | 1 pinacoidal |
| Unit cell | a = 9.69 Å, b = 10.5 Å, c = 17.39 Å; α = 112.17°, β = 102.85°, γ = 82.93°; V 1,596.00 ų; Z = 14 |
| Identification | |
| Color | pink, red, brown |
| Crystal system | Triclinic |
| Twinning | Lamellar on {010}, simple on {001} |
| Cleavage | Perfect on {110}, {110}, (110) ^ (110) = 92° poor on {010}, {001} |
| Fracture | hackly, uneven |
| Tenacity | brittle |
| Mohs scale hardness | 5½–6 |
| Luster | vitreous, pearly |
| Streak | colorless |
| Diaphaneity | transparent, translucent |
| Specific gravity | 3.8 |
| Birefringence | δ=0.018 |
| References | [1][2][3] |
Pyroxmangite has the general chemical formula of MnSiO3.[4] It is the high-pressure, low-temperature dimorph of rhodonite.[1]
It was first described in 1913 and named for the mineral group, pyroxenes, and is known as the manganese member.[5] It forms a series with pyroxferroite.
Pyroxmangite occurs in metamorphosed ore deposits rich in manganese. Associated minerals include spessartine, tephroite, alleghanyite, hausmannite, pyrophanite, alabandite, rhodonite and rhodochrosite.[3]
References
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- ↑ 1.0 1.1 Ralph, Jolyon, and Ida Chao. "Pyroxmangite: Pyroxmangite Mineral Information and Data." MinDat.org
- ↑ Barthelmy, David. "The Mineral Pyroxmangite." minerals.net
- ↑ 3.0 3.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Pinckney, Linda R, and Charles W Burnham. "High-Temperature crystal structure of pyroxmangite." American Mineralogist 73 (1988): 809–817. GeoScienceWorld. Web. 13 September 2010.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
