Henclová - nová lokalita pseudomalachitu v Slovenskej republike

Pages 36-39
Bulletin mineralogicko-petrologického oddělení Národního muzea v Praze | 2008/16/1

Pseudomalachite was found at mine dumps of the occurrence Breziny, about 200 m northern from the Henclová village, the Slovenské Rudohorie Mountains, Slovak Republic. It forms hemispherical aggregates and crusts (up to 3 x 3 cm in size) in the cavities of quartz gangue in association with malachite, goethite and rare relics of primary chalcopyrite. Surface of its spherical aggregates is formed by tiny (up to 80 μm) tabular crystals. Pseudomalachite aggregates are dark green, non-diaphanous and they have a shimmer to vitreous luster. Pseudomalachite is monoclinic, space group P21/c, the unit-cell parameters refined from X-ray powder data are: a = 4.4799(5), b = 5.7485(7), c = 17.061(2) Å, β = 91.13° (1), V = 439.27(6) Å3. The ED analysis at electron microprobe confirmed results of X-ray diffraction study; Cu, P and O were found as main constituents.

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