osumilite

Osumilite is a very rare potassium-sodium-iron-magnesium-aluminium silicate mineral. Osumilite is part of the milarite group (also known as the milarite-osumilite group) of cyclosilicates.

Key facts

Mineral.name: Osumilite
Mineral.category: Cyclosilicate
Mineral.image: Osumilite tablets with Mullite - Ochtendung, Eifel, Germany.jpg
Mineral.imagesize: 260px
Mineral.caption: Osumilite tablets with mullite from Ochtendung, Eifel, Germany.
Mineral.IMAsymbol: Osm
Mineral.dana: 63.02.01a.06
Mineral.strunz: 9.CM.05
Mineral.system: Hexagonal
Mineral.class: Dihexagonal dipyramidal (6mmm) H-M symbol: (6/m 2/m 2/m)
Mineral.symmetry: P6/mcc
Mineral.unit cell: a = 10.15, c = 14.25 [Å]; Z = 2
Mineral.color: Black, dark blue, dark brown, pink, gray
Mineral.habit: Crystals tabular to prismatic also anhedral and massive
Mineral.twinning: Rarely
Mineral.cleavage: None
Mineral.fracture: Subconchoidal
Mineral.mohs: 5 - 6

via Wikipedia infobox

~2 min read

Encyclopedic overview

4 sections

Contents

Characteristics
Occurrence
See also
References

Osumilite is a very rare potassium-sodium-iron-magnesium-aluminium silicate mineral. Osumilite is part of the milarite group (also known as the milarite-osumilite group) of cyclosilicates.

==Characteristics==

Excerpted from Wikipedia’s “osumilite” article, available under the CC BY-SA 4.0 licence.