Magadiite
Script error: No such module "Infobox".Template:Template otherScript error: No such module "Check for unknown parameters". Magadiite is a hydrous sodium silicate mineral (NaSi7O13(OH)3·4(H2O)) which precipitates from alkali brines as an evaporite phase. It forms as soft (Mohs hardness of 2) white powdery monoclinic crystal masses.[1][2] The mineral is unstable and decomposes during diagenesis leaving a distinctive variety of chert (Magadi-type chert).[3]
The mineral was first described by Hans P. Eugster in 1967 for an occurrence in Lake Magadi, Kenya, and is also found at Olduvai Gorge, Tanzania.[2][3] It is also reported from alkalic intrusive syenites as in Mont Saint-Hilaire, Canada.[1]
References
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- ↑ a b Mineral Handbook
- ↑ a b Webmineral
- ↑ a b Encyclopedia of Sediments & Sedimentary Rocks, Springer, 2003, p. 417, Template:ISBN
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