| Keatite | |
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Crystal structure
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| General | |
| Category | Silicate mineral |
| Formula (repeating unit) | SiO2 |
| Strunz classification | 4.DA.45 |
| Crystal system | Tetragonal |
| Identification | |
| Crystal habit | Microscopic inclusions |
Keatite is a silicate mineral with the chemical formula SiO2 (silicon dioxide) that was discovered in nature in 2013. It is a tetragonal polymorphofsilica first known as a synthetic phase.[1] It was reported as minute inclusions within clinopyroxene (diopside) crystals in an ultra high pressure garnet pyroxenite body. The host rock is part of the Kokchetav MassifinKazakhstan.[2]
Keatite was synthesized in 1954 and named for Paul P. Keat who discovered it while studying the role of soda in the crystallization of amorphous silica.[3] Keatite was well known before 1970 as evidenced in few studies from that era.[4][5]
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| Crystalline |
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| Cryptocrystalline |
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| Amorphous |
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| Miscellaneous |
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| Notable varieties |
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