Bismit z uranového rudního výskytu Harrachov-Rýžoviště =Bismite from uranium ore occurrence Harrachov-Rýžoviště

Abstract

Bismite, the momoclinic Bi2O3, was found at small uranium occurrence Rýžoviště near Harrachov, Krkonoše Mts., Czech Republic. Bismite forms grey massive aggregate with greasy luster. Unit cell parameters of bismitea=5.842(6),b=8.170(6, c=7.503(6)A, á=67.09(5)ř for monocline cell and a=5.852(6), b=8.167(5), c=13.820(8) from orthorhombic pseudocell agree good with other publisch data. IR absorption spectra are given, it is close to corundum andamorphousSiO2 spectra