Magnesioferrite
MgFe3+2O4IMA symbol: Mfrgrandfathered
Magnesioferrite is an oxide or hydroxide mineral with the formula MgFe3+2O4, crystallizing in the cubic system. It has a Mohs hardness of 6-6.5, a specific gravity of 6.5. Its streak is garnet.
Photos
Crystallography
| Crystal system | cubic crystal systemWikidata (CC0) |
|---|---|
| Space group | F d -3 m :1 |
| Cell (Å, °) | a = 8.3978, b = 8.3978, c = 8.3978; α = 90, β = 90, γ = 90 |
| Cell volume | 592.2 ų, Z = 8 |
| Axial ratios | 1.0000:1:1.0000calculated from COD 1006063 |
| Source structure | COD 1006063 (Solid State Ionics, 1993) — 1 of 129 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 2.532 | 1.485 | 2.969 | 1.616 | 2.099 | 1.093 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 57.2 | 36.6 | 33.6 | 25.7 | 16.9 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 1006063; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 4.285 g/cm³calculated from COD 1006063 |
|---|---|
| Hardness (Mohs) | 6-6.5Dana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 6.5 g/cm3single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Streak | garnetsingle sourceWikidata (CC0) |
Classification
| Nickel-Strunz (10th) | 4.BB.05Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 4.BB.05Wikidata (CC0) |
| Dana (8th) | 7.2.2.1Wikidata (CC0) |