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Gregoryite, Nyerereite
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| Mineral: | Gregoryite: (Na2,K2,Ca)CO3 Nyerereite: Na2Ca(CO3)2 | ||||
| Comments: | Sodium (nyereteite) and potassium (gregoryite) carbonates, not stable in normal atmosphere, collected molten from the volcano and maintained in inert argon atmosphere. | ||||
| Location: | Ol Doinyo Lengai Vulkan, Maasai Steppe, East Africa Rift Valley, Tanzania. See Link. | ||||
| Scale: | Rock size 2 cm. | ||||
| Copyright: | © Richard Dale / Dale Minerals | ||||
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