Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

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During preliminary investigations of lithium mica from Govindpal area of Bastar District, a variety very rich in Rb2O (6.98%) was noted and is being reported here for the first time. It is colourless with fair relief. Extn. angle 6°; 2V 42° ± 1°. The high rubidium content is attributed to extreme differentiation of the host rock and extensive diadochic relationship of rubidium with potassium.
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