Niningerite

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.

Niningerite
General
Category	Sulfide minerals
Formula	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

See also

• Glossary of meteoritics