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ringwoodite
Sign in to savethumb|Scanning electron microscope|SEM image of Ringwoodite (RGW) discovered in the Suizhou L6 [[chondrite meteorite. See image for details. ]]
Key facts
- Mineral.name
- Ringwoodite
- Mineral.image
- BlueRingwoodite.jpg
- Mineral.caption
- Crystal (~150 micrometers across) of Fo90 composition blue ringwoodite synthesized at 20 GPa and 1200 °C.
- Mineral.category
- Nesosilicates Spinel group
- Mineral.formula
- Magnesium silicate (Mg2SiO4)
- Mineral.IMAsymbol
- Rgd
- Mineral.strunz
- 9.AC.15
- Mineral.system
- Cubic
- Mineral.class
- Hexoctahedral (mm) H-M symbol: (4/m 2/m)
- Mineral.symmetry
- Fdm
- Mineral.unit cell
- a = 8.113 Å; Z = 8
- Mineral.colour
- Deep blue, also red, violet, or colourless (pure Mg2SiO4)
- Mineral.habit
- Microcrystalline aggregates
- Mineral.diaphaneity
- Semitransparent
- Mineral.gravity
- 3.90 (Mg2SiO4); 4.13 ((Mg0.91,Fe0.09)2SiO4); 4.85 (Fe2SiO4)
- Mineral.opticalprop
- Isotropic
- Mineral.refractive
- n = 1.8
- Mineral.birefringence
- none
via Wikipedia infobox
Article
8 sectionsContents
- Characteristics
- Geological occurrences
- Synthetic
- Crystal structure
- Chemical composition
- Physical properties
- References
- External links
thumb|Scanning electron microscope|SEM image of Ringwoodite (RGW) discovered in the Suizhou L6 [[chondrite meteorite. See image for details. ]]
Ringwoodite is a high-pressure phase of Mg2SiO4 (magnesium silicate) formed at high temperatures and pressures of the Earth's mantle between depth. It may also contain iron and hydrogen. It is polymorphous with the olivine phase forsterite (a magnesium iron silicate).