| Pyroxmangite | |
| Category: | Inosilicate minerals (single chain) |
| Group: | Pyroxene group |
| Series: | Pyroxferroite-Pyroxmangite series |
| Formula: | MnSiO3 |
| Imasymbol: | Pxm[1] |
| Strunz: | 9.DO.05 |
| System: | Triclinic |
| Class: | Pinacoidal (same H-M symbol) |
| Symmetry: | C |
| 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 Å3; Z = 28 |
| Color: | pink, red, brown |
| Twinning: | Lamellar on, simple on |
| Cleavage: | Perfect on,, (110) ^ (10) = 92° poor on, |
| Fracture: | hackly, uneven |
| Tenacity: | brittle |
| Mohs: | - 6 |
| Luster: | vitreous, pearly |
| Birefringence: | δ=0.018 |
| Streak: | colorless |
| Gravity: | 3.8 |
| Other: | morphology: tabular crystals, granular massive, grainy |
| Diaphaneity: | transparent, translucent |
| References: | [2] [3] [4] |
Pyroxmangite has the general chemical formula of MnSiO3.[5] It is the high-pressure, low-temperature dimorph of rhodonite.[2]
It was first described in 1913 and named for the mineral group, pyroxenes, and is known as the manganese member.[6] 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.[4]
