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Petrov, A. D.; Mironov, V. F. Doklady Akademii Nauk SSSR, 1950 , vol. 75, p. 707 - 710 Full Text Show Details Petrov, A. D.; Mironov, V. F. Doklady Akademii Nauk SSSR, 1951 , vol. 80, p. 761 - 764 Full Text Show Details Gmelin Handbook: Si: MVol.C, 16, page 48 - 53