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- W2157194865 abstract "Raman spectroscopic studies of daughter crystals of hambergite [Be2BO3(OH, F)] in primary melt and secondary fluid inclusions in morganite crystals from the Muiane pegmatite, Mozambique, show that the inclusions have extremely high beryllium concentrations, corresponding to as much as 10.6% (g/g) in melt inclusions and 1.25% (g/g) BeO in fluid inclusions. These melt and fluid inclusions were trapped at about 610°C and 277°C, respectively. We propose two possible mechanisms for the formation of the hambergite crystals: (i) direct crystallization from a boron- and beryllium-rich pegmatite-forming melt or (ii) these are daughter crystals produced by the retrograde reaction of the boron-rich inclusion fluid with the beryl host, after release of boric acid from the primary trapped metastable volatile-rich silicate melt during cooling and recrystallization. Although we favor the second option, either case demonstrate the extent to which Be maybe concentrated in a boron-rich fluid at relatively high temperatures, and in which species of Be maybe transported. One important constraint on the stability of the hambergite paragenesis is temperature; at temperatures of ≥650°C (at 2 kbar) hambergite is not stable and converts to bromellite [BeO]." @default.
- W2157194865 created "2016-06-24" @default.
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- W2157194865 date "2010-10-02" @default.
- W2157194865 modified "2023-09-27" @default.
- W2157194865 title "Hambergite-rich melt inclusions in morganite crystals from the Muiane pegmatite, Mozambique and some remarks on the paragenesis of hambergite" @default.
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- W2157194865 doi "https://doi.org/10.1007/s00710-010-0132-8" @default.
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