Key facts
- Mineral.name
- Cryptomelane
- Mineral.image
- Kryptomelan2, Maroko.jpg
- Mineral.imagesize
- 260px
- Mineral.category
- Oxide mineral
- Mineral.formula
- K(Mn4+,Mn2+)8O16
- Mineral.IMAsymbol
- Cml
- Mineral.strunz
- 4.DK.10
- Mineral.system
- Tetragonal
- Mineral.class
- Dipyramidal (4/m) H-M symbol: (4/m)
- Mineral.symmetry
- I4/m
- Mineral.unit cell
- a = 9.956 Å, b = 2.8705 Å, c = 9.706 Å; β = 90.95°; Z = 1
- Mineral.color
- Steel-gray to bluish gray; light tan or gray in reflected light
- Mineral.habit
- Rare as subhedral crystals, commonly as compact fine-grained masses, banded colloform, botryoidal, or radial fibrous aggregates
- Mineral.twinning
- Twinning developed on (010) and (101) resulting in a pseudotetragonal unit cell.
- Mineral.fracture
- Conchoidal
- Mineral.tenacity
- Brittle
- Mineral.mohs
- 6 – 6.5
- Mineral.luster
- Metallic to dull
via Wikipedia infobox
Wikidata facts
- Named after
- secrecy
- Image
- Kryptomelan2, Maroko.jpg
Show 7 more facts
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 4.DK.05a
- Nickel-Strunz 9th edition (updated 2009)
- 4.DK.05
- Commons category
- Cryptomelane
- type locality (geology)
- Tombstone
- crystal system
- monoclinic crystal system
- IMA Mineral Symbol
- Cml
- chemical formula
- K(Mn⁴⁺₇Mn³⁺)O₁₆
Sources (2)
via Wikidata · CC0
Article · Italiano
Il criptomelano è un minerale appartenente al gruppo della coronadite.
Abstract from DBpedia / Wikipedia · CC BY-SA