loparite
Sign in to saveAlso known as loparite-(Ce)
Loparite-(Ce) is a granular, brittle oxide mineral of the perovskite class. It is black to dark grey and may appear grey to white in reflected light on polished thin section with reddish brown internal reflections. It has the chemical formula of . Nioboloparite is a variation of loparite-(Ce) containing niobium.
Key facts
- Mineral.name
- Loparite-(Ce)
- Mineral.category
- Oxide minerals
- Mineral.image
- Loparite-(Ce)-41714.jpg
- Mineral.imagesize
- 260px
- Mineral.IMAsymbol
- Lop-Ce
- Mineral.strunz
- 4.CC.35
- Mineral.color
- Black to grey-brown in thin section
- Mineral.habit
- Cubic and octahedral crystals and massive
- Mineral.system
- Loparit-(Ce)-Q: tetragonal Loparit-(Ce)-O: orthorhombisch Loparit-(Ce)-C: cubic
- Mineral.twinning
- Penetration twins common on [111]
- Mineral.cleavage
- [100] Imperfect
- Mineral.fracture
- Uneven
- Mineral.tenacity
- Brittle
- Mineral.mohs
- 5.5–6.0
- Mineral.luster
- Metallic to sub-metallic
- Mineral.refractive
- n = 2.26–2.38
- Mineral.opticalprop
- Isotropic, anomalously anisotropic
- Mineral.streak
- Reddish brown
via Wikipedia infobox
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Encyclopedic overview
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- Etymology
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Loparite-(Ce) is a granular, brittle oxide mineral of the perovskite class. It is black to dark grey and may appear grey to white in reflected light on polished thin section with reddish brown internal reflections. It has the chemical formula of . Nioboloparite is a variation of loparite-(Ce) containing niobium.
Loparite occurs as a primary phase in nepheline syenite intrusions and pegmatites. It is also found replacing perovskite in carbonatites.
Excerpted from Wikipedia’s “loparite” article, available under the CC BY-SA 4.0 licence.