"[3B093D738897]" . . . "601099" . . . . . "A detailed electron microprobe study of P, F, Ge and Ga-contents in rock-forming topaz was performed on a suite of Variscan Podles\u00ED granites, Czech Republic. Phosphorus contents reach 0.5 wt% (= 1.15 wt% P2O5) in topaz from the zinnwaldite granite. Many crystals are distinctly zoned with a maximum in P- contents in the transition zone between core and margin. Phosphorus is incorporated into topaz lattice by berlinite substitution: Al3+ + P5+ = Si4+ + Si4+. The majority of analysed topazes are highly aturated in F, reaching 90-97 % of the theoretical maximum saturation. Topaz from the marginal pegmatite only reaches 87-90% of F-saturation. There is a positive correlation between Ptopaz and Pwhole rock, but no correlation between Ftopaz and Fwhole" . "RIV/00025798:_____/03:00000117" . "Brno" . "Chemistry of phosphorus-rich topaz" . "0"^^ . "LERM 2003 International symposium on Light Elements in Rock-forming Minerals, Book of Abstracts" . "0"^^ . "2"^^ . "A detailed electron microprobe study of P, F, Ge and Ga-contents in rock-forming topaz was performed on a suite of Variscan Podles\u00ED granites, Czech Republic. Phosphorus contents reach 0.5 wt% (= 1.15 wt% P2O5) in topaz from the zinnwaldite granite. Many crystals are distinctly zoned with a maximum in P- contents in the transition zone between core and margin. Phosphorus is incorporated into topaz lattice by berlinite substitution: Al3+ + P5+ = Si4+ + Si4+. The majority of analysed topazes are highly aturated in F, reaching 90-97 % of the theoretical maximum saturation. Topaz from the marginal pegmatite only reaches 87-90% of F-saturation. There is a positive correlation between Ptopaz and Pwhole rock, but no correlation between Ftopaz and Fwhole"@en . "1"^^ . . "Chemistry of phosphorus-rich topaz"@en . "10/09/04" . . "2"^^ . . "Masarykova univerzita" . "Breiter, Karel" . . . "Nov\u00E9 M\u011Bsto na Morav\u011B" . "topaz; granite; phosphorus"@en . . "Chemistry of phosphorus-rich topaz" . . "Chemistry of phosphorus-rich topaz"@en . . . "RIV/00025798:_____/03:00000117!RIV/2004/MZP/N03004/N" . "Z(MZP:N03/98:00)" . "80-7028-199-5" . .