Heat capacities and thermodynamic functions for beryl, Be3Al2Si6O18, phenakite, Be2SiO4, euclase, BeAlSiO4(OH), bertrandite, Be4Si2O7(OH)2, and chrysoberyl, BeAl2O4

The heat capacities of beryl, phenakite, euclase and bertrandite have been measured between approx 5 and 800 K by combined quasi-adiabatic cryogenic calorimetry and differential scanning calorimetry. The heat capacities of chrysoberyl have been measured from 340 to 800 K. The resulting data have bee...

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Bibliographic Details
Published in:The American mineralogist 1986-04, Vol.71 (3-4), p.557-568
Main Authors: Hemingway, Bruce S, Barton, Mark D, Robie, R. A, Haselton, Jr
Format: Article
Language:English
Subjects:
bertrandite
beryl
beryllium minerals
beryllium ores
chrysoberyl
Economic geology
euclase
experimental studies
geochemistry
granites
heat capacity
igneous rocks
metal ores
mineral data
Mineralogy
minerals
nesosilicates
orthosilicates
oxides
pegmatite
phenakite
phenakite group
plutonic rocks
properties
ring silicates
silicates
sorosilicates
thermodynamic properties
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Summary:The heat capacities of beryl, phenakite, euclase and bertrandite have been measured between approx 5 and 800 K by combined quasi-adiabatic cryogenic calorimetry and differential scanning calorimetry. The heat capacities of chrysoberyl have been measured from 340 to 800 K. The resulting data have been combined with solution and phase-equilibrium experimental data and simultaneously adjusted using the programme PHAS20 to provide an internally consistent set of thermodynamic properties for several important beryllium phases. The experimental heat capacities and tables of derived thermodynamic properties are presented.
ISSN:0003-004X
1945-3027