Английская Википедия:Gregoryite
Gregoryite is an anhydrous carbonate mineral that is rich in potassium and sodium[1] with the chemical formula Шаблон:Chem2.[2][3][4] It is one of the two main ingredients of natrocarbonatite, found naturally in the lava of Ol Doinyo Lengai volcano of Arusha Region, Tanzania, and the other being nyerereite.[5]
Because of its anhydrous nature, gregoryite reacts quickly with the environment, causing the dark lava to be converted to white substance within hours.[1]
Gregoryite was first described in 1980 and named after the British geologist and author John Walter Gregory (1864–1932), who studied the East African Rift Valley.[2][6] It occurs associated with nyerereite, alabandite, halite, sylvite, fluorite and calcite.[7]
References
- ↑ 1,0 1,1 Шаблон:Cite web
- ↑ 2,0 2,1 Ошибка цитирования Неверный тег
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- ↑ Шаблон:Cite journalШаблон:Dead linkШаблон:Cbignore
- ↑ Шаблон:Cite web
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