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- Title
Vauquelinit z ložiska polymetalických rud Suchovršice u Trutnova (Česká republika).
- Authors
PAULÍŠ, PETR; KOPECKÝ, SEN STANISLAV; KOPECKÝ, JUN STANISLAV; SEJKORA, JIŘÍ; MALIKOVÁ, RADANA
- Abstract
Vauquelinite, a rare phosphate and chromate of Cu and Pb, was found at the mine dump in base-metal deposit Suchovršice near Trutnov (Czech Republic). It occurs there as green-yellowish powder aggregates on the area up to 1 x 1 cm on the siliceous sandstone. Vauquelinite forms rosette aggregates composed by very thin platy crystals with a length of 10 - 20 µm and thickness about 1 µm only. The unit cell parameters of vauquelinite refined from powder X-ray data are: a 13.758(4) Å, b 5.806(2), c 9.558(5) Å, 94.58(4)° and V761.0(5) ų. Chemical analyses of vauquelinite (mean of 4 points) correspond to the empirical formula (Pb1.94Ca0.02)Σ1.98(Cu1.02Al0.03Fe0.02)Σ1.07[(PO4)0.84(AsO4)0.13(VO4)0.01]Σ0.98 [(CrO4)0.79(SiO4)0.21]Σ1.00(OH)0.73.
- Subjects
CHROMATES; CHROMIUM compounds; CALCIUM chromate; COPPER phosphate; COPPER compounds
- Publication
Bulletin Mineralogicko-Petrologickeho Oddeleni Narodniho Muzea v Praze, 2014, Vol 22, Issue 1, p82
- ISSN
1211-0329
- Publication type
Article