coesite
Sign in to saveCoesite () is a form (polymorph) of silicon dioxide (SiO2) that is formed when very high pressure (2–3 gigapascals), and moderately high temperature (), are applied to quartz. Coesite was first synthesized by Loring Coes, Jr., a chemist at the Norton Company, in 1953.
Key facts
- Mineral.name
- Coesite
- Mineral.image
- Coesiteimage.jpg
- Mineral.imagesize
- 260px
- Mineral.caption
- Crossed-polars image of coesite grain (gray) ~1 mm across in eclogite. Small, colored inclusion is pyroxene. Polycrystalline rim is quartz.
- Mineral.category
- Tectosilicate minerals
- Mineral.group
- Quartz group
- Mineral.molweight
- 60.0843 g/mol
- Mineral.IMAsymbol
- Coe
- Mineral.strunz
- 4.DA.35
- Mineral.system
- Monoclinic
- Mineral.class
- Prismatic (2/m) (same H–M symbol)
- Mineral.symmetry
- C2/c
- Mineral.unit cell
- a = 7.143b = 12.383c = 7.143 [Å]β = 120.00°Z = 16
- Mineral.color
- Colorless
- Mineral.habit
- Inclusions in UHP metamorphic minerals up to 3 mm in size
- Mineral.fracture
- Conchoidal
- Mineral.tenacity
- Brittle
- Mineral.mohs
- 7.5-8
via Wikipedia infobox
Article
5 sectionsContents
- Occurrences
- Crystal structure
- See also
- References
- External links
Coesite () is a form (polymorph) of silicon dioxide (SiO2) that is formed when very high pressure (2–3 gigapascals), and moderately high temperature (), are applied to quartz. Coesite was first synthesized by Loring Coes, Jr., a chemist at the Norton Company, in 1953.
==Occurrences==