Abstract The chemical composition (including B, Be and Li), the Raman spectrum crystal-structure evolution (at temperature range 27–1000°C) of a Mn-bearing, Bi-rich gadolinite-subgroup mineral from Jaguaraçu Pegmatite, Brazil (type-locality minasgeraisite-(Y)) was studied. Elemental mapping revealed that crystal investigated has complex zonation with various Bi (~8–24 wt.% 2 O 3 ), Ca (~8–10 Ca...

The field work, backscattered electron images and detailed microanalyses of three generations tourmaline from the Namacotche LCT pegmatites allows de distinction between compositional magmatic hydrothermal tourmalines. generation 1 occurs in outer intermediate zone pegmatite. It consists zoned crystals with an oscillatory inner core foitite schorl, schorl Fe-rich fluor-elbaite rim. Unzoned occu...

Quartz from 254 pegmatites representing eight pegmatite fields and provinces worldwide was investigated by laser-ablation inductively-coupled plasma mass spectrometry (LA-ICP-MS) to determine concentrations of trace elements Al, Ti, Li, Ge, B, Be, Rb, Na, K, Ca, P, Ga, Sb, Zn U. A total 271 new analyses combined with 535 published LA-ICP-MS quartz chemistry data were evaluated binary ternary el...