| Niningerite | |
|---|---|
| General | |
| Category | Sulfide minerals |
| Formula (repeating unit) | MgS |
| IMA symbol | Nng[1] |
| Strunz classification | 2.CD.10 |
| Crystal system | Cubic |
| Crystal class | Hexoctahedral (m3m) H-M symbol: (4/m 3 2/m) |
| Space group | Fm3m |
| Unit cell | a = 5.2 Å; Z = 4 |
| Identification | |
| Color | grey |
| Mohs scale hardness | 3+1⁄2 – 4 |
| Luster | metallic |
| Diaphaneity | opaque |
Niningerite is a magnesium–iron–manganese sulfide mineral with the chemical formula MgS that is found in enstatite chondrite meteorites.[2] Niningerite is the magnesium-dominant analog of keilite.[3] This mineral is named after Harvey H. Nininger.
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