An X-Ray Investigation of Green Mica in Khondalite from Auranga-Koel Valley, Palamau, Bihar, India

M. P. Gupta and N. P. Gupta
Department of Physics, Ranchi University, Bihar, India

Summary: A new variety of chrome mica containing V2O3 and TiO2 has been investigated by X-rays. It is shown that the crystals of this mica are monoclinic with a= 5·25 Å, b = 9·03 Å, c = 20·11 Å, β = 96·00′, space group C 2/c. Comparison of the intensities of the X-ray powder lines of this new variety of mica with that of pure muscovite may indicate structural changes. The optical properties and chemical composition of the mica are described.

Mineralogical Magazine; December 1967 v. 36; no. 280; p. 591-594; DOI: 10.1180/minmag.1967.036.280.12
© 1967, The Mineralogical Society
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