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Influence of cation size on the low-temperature heat capacity of alkaline earth metasilicate glasses

  • Pascal Richet EMAIL logo , Atsusi Nidaira , Daniel R. Neuville and Tooru Atake
Published/Copyright: April 1, 2015
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American Mineralogist
From the journal American Mineralogist Volume 94 Issue 11-12

Abstract

The heat capacities of Sr and Ba metasilicate glasses and of a Mg silicate glass with only 44 mol% SiO2 have been measured between 2 and 300 K with the Quantum Design Physical Property Measurement System. The derived vibrational entropies S298-S0 are 50.90, 61.00, and 36.65 J/(mol⋅K) for Sr0.5Si0.5O1.5, Ba0.5Si0.5O1.5, and Mg0.56Si0.44O1.44 glasses, respectively. Along with available data for Mg- and Ca-bearing glasses, these results indicate a regular variation of the partial molar vibrational entropy of the metal oxide as a function of the ionization potential of the cation. At very low temperatures, however, the excess heat capacity of barium metasilicate glass relative to Debye limiting T3 law is stronger than expected from such a trend, whereas Mg1.12Si0.88O2.88 is the known glass whose CP deviates the less from this law.

Keywords: Heat capacity; entropy; alkaline earth silicate glasses
Received: 2009-3-11
Accepted: 2009-6-17
Published Online: 2015-4-1
Published in Print: 2009-11-1

© 2015 by Walter de Gruyter Berlin/Boston

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https://doi.org/10.2138/am.2009.3240
Keywords for this article
Heat capacity; entropy; alkaline earth silicate glasses

Articles in the same Issue

  1. Review Paper. Microbe-clay mineral interactions
  2. Chemical substitutions, paragenetic relations, and physical conditions of formation of högbomite in the Sittampundi layered anorthosite complex, South India
  3. Miguelromeroite, the Mn analogue of sainfeldite, and redefinition of villyaellenite as an ordered intermediate in the sainfeldite-miguelromeroite series
  4. Mechanism and kinetics of a mineral transformation under hydrothermal conditions: Calaverite to metallic gold
  5. A statistical reassessment of the evidence for the racemic distribution of quartz enantiomorphs
  6. On the crystal structure and crystal chemistry of pollucite, (Cs,Na)16Al16Si32O96·nH2O: A natural microporous material of interest in nuclear technology
  7. The effect of fluid inclusion size on determination of homogenization temperature and density of liquid-rich aqueous inclusions
  8. Effect of SiO2, total FeO, Fe3+/Fe2+, and alkali elements in basaltic glasses on mid-infrared
  9. Influence of cation size on the low-temperature heat capacity of alkaline earth metasilicate glasses
  10. The high-pressure–high-temperature behavior of bassanite
  11. Geochemistry of reversible hydratable tephra from the Trans Mexican Volcanic Belt
  12. Physical contradictions and remedies using simple polythermal equations of state
  13. Thermodynamic and crystallographic properties of kornelite [Fe2(SO4)3·~7.75H2O] and paracoquimbite [Fe2(SO4)3·9H2O]
  14. Humidity-induced phase transitions of ferric sulfate minerals studied by in situ and ex situ X-ray diffraction
  15. In situ Raman spectroscopy of MgSiO3 enstatite up to 1550 K
  16. Optical spectroscopic study of tetrahedrally coordinated Co2+ in natural spinel and staurolite at different temperatures and pressures
  17. New insights into smectite illitization: A zoned K-bentonite revisited
  18. The hydrothermal conversion of kaolinite to kalsilite: Influence of time, temperature, and pH
  19. Sideronatrite, Na2Fe(SO4)2(OH)·3H2O: Crystal structure of the orthorhombic polytype and OD character analysis
  20. Anharmonic OH vibrations in brucite: Small pressure-induced redshift in the range 0–22 GPa
  21. Structural properties of biologically controlled hydrozincite: An HRTEM and NMR spectroscopic study
  22. Mechanism of wollastonite carbonation deduced from micro- to nanometer length scale observations
  23. Letter. Crystal structure of argentopyrite, AgFe2S3, and its relationship with cubanite
  24. Letter. Magnetite-free, yellow lizardite serpentinization of olivine websterite, Canyon Mountain complex, N.E. Oregon
  25. Letter. The influence of atomic size and charge of dissolved species on the diffusivity and viscosity of silicate melts
  26. Letter. Si-Al distribution in high-pressure CaAl4Si2O11 phase: A 29Si and 27Al NMR study
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