پایراکسفروات
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Pyroxferroite (Fe2+,Ca)SiO3 is a single chain inosilicate. It is mostly composed of iron, silicon and oxygen, with smaller fractions of calcium and several other metals. Together with armalcolite and tranquillityite, it is one of the three minerals which were discovered on the Moon during the 1969 Apollo 11 mission. It was then found in Lunar and Martian meteorites as well as a mineral in the Earth's crust. Pyroxferroite can also be produced by annealing synthetic clinopyroxene at high pressures and temperatures. The mineral is metastable and gradually decomposes at ambient conditions, but thi
Key facts
- Mineral.name
- Pyroxferroite
- Mineral.category
- Inosilicate minerals (single chain)
- Mineral.group
- Pyroxene group
- Mineral.series
- Pyroxferroite-Pyroxmangite series
- Mineral.image
- Pyroxferroite.jpg
- Mineral.caption
- Pyroxferroite
- Mineral.formula
- (Fe2+,Ca)SiO3
- Mineral.IMAsymbol
- Pxf
- Mineral.strunz
- 9.DO.05
- Mineral.system
- Triclinic
- Mineral.symmetry
- P (no. 2)
- Mineral.unit cell
- a = 6.6213 Å, b = 7.5506 Å, c = 17.3806 Å, α = 114.267°, β = 82.684°, γ = 94.756°, Z = 14
- Mineral.color
- Yellow
- Mineral.cleavage
- Good on (010), poor on (001)
- Mineral.mohs
- 4.5–5.5
- Mineral.luster
- Vitreous
- Mineral.opticalprop
- Biaxial (+)
- Mineral.refractive
- nα = 1.748–1.756 nβ = 1.750–1.758 nγ = 1.767–1.768
via Wikipedia infobox