homilite
Sign in to saveHomilite is a borosilicate mineral belonging to the gadolinite group of minerals with formula .
Key facts
- Mineral.symmetry
- P21/b
- Mineral.name
- Homilite
- Mineral.imagesize
- 260px
- Mineral.category
- Nesosilicate
- Mineral.formula
- Ca2(Fe2+,Mg)B2Si2O10
- Mineral.IMAsymbol
- Hom
- Mineral.strunz
- 8/B.29-30
- Mineral.system
- Monoclinic
- Mineral.class
- Prismatic (2/m)
- Mineral.unit cell
- a = 9.78 Å, b = 7.61 Å, c = 4.78 Å; β = 90.56°; Z = ?
- Mineral.color
- Greenish to brownish black
- Mineral.mohs
- 5–
- Mineral.luster
- Vitreous, resinous
- Mineral.diaphaneity
- Opaque
- Mineral.gravity
- 3.34
- Mineral.opticalprop
- Biaxial (+)
- Mineral.refractive
- nα = 1.715 nβ = 1.725 nγ = 1.738
- Mineral.birefringence
- δ =
via Wikipedia infobox
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Encyclopedic overview
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Homilite is a borosilicate mineral belonging to the gadolinite group of minerals with formula .
It occurs as brown monoclinic crystals (space group P21/a) within feldspar masses in pegmatite and was discovered in 1876 in Stoko island, Langesundfiord, Norway. The name is from the Greek for to occur together, in allusion to its association with meliphanite and allanite.
Excerpted from Wikipedia’s “homilite” article, available under the CC BY-SA 4.0 licence.
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