ludwigite
Sign in to saveLudwigite is a magnesium-iron borate mineral: Mg2FeBO5.
Key facts
- Mineral.name
- Ludwigite
- Mineral.category
- Borate mineral
- Mineral.image
- Ludwigite-242641.jpg
- Mineral.imagesize
- 260px
- Mineral.caption
- Radial aggregates of lustrous, black, metallic, acicular ludwigite crystals to 0.5 cm, from Alta Stock, Salt Lake County, Utah, USA.
- Mineral.formula
- Mg2Fe3+BO5
- Mineral.IMAsymbol
- Ldw
- Mineral.molweight
- 195.26 g/mol
- Mineral.strunz
- 6.AB.30
- Mineral.system
- Orthorhombic
- Mineral.class
- Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m)
- Mineral.symmetry
- Pbam
- Mineral.unit cell
- a = 9.26, b = 12.26 c = 3.05 [Å]; Z =
- Mineral.color
- Pitch-black, olive-black
- Mineral.habit
- Massive – fibrous commonly in fanlike to felted aggregates
- Mineral.cleavage
- [001] Perfect
- Mineral.fracture
- Brittle – Conchoidal – Very brittle fracture producing small, conchoidal fragments.
- Mineral.mohs
- 5.5
via Wikipedia infobox
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Encyclopedic overview
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- References
Ludwigite is a magnesium-iron borate mineral: Mg2FeBO5.
Ludwigite typically occurs in magnesian iron skarn and other high temperature contact metamorphic deposits. It occurs in association with magnetite, forsterite, clinohumite and the borates vonsenite and szaibelyite. It forms a solid solution series with the iron(II)-iron(III) borate mineral vonsenite.
Excerpted from Wikipedia’s “ludwigite” article, available under the CC BY-SA 4.0 licence.