Room-temperature equation of state of Li2VOSiO4 up to 8.5 GPa

被引：0
作者：
Serena C. Tarantino
Michele Zema
Tiziana Boffa Ballaran
Paolo Ghigna
机构：
[1] Università di Pavia,Dipartimento di Scienze della Terra
[2] CNR,Bayerisches Geoinstitut
[3] Istituto di Geoscienze e Georisorse,Dipartimento di Chimica Fisica “M. Rolla”
[4] sezione di Pavia,undefined
[5] Universität Bayreuth,undefined
[6] Università di Pavia,undefined
来源：
Physics and Chemistry of Minerals | 2008年 / 35卷
关键词：
Li; VOSiO; X-ray single-crystal diffraction; High pressure; Equation of state;
D O I：
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学科分类号：
摘要：
High-pressure single-crystal X-ray diffraction measurements of lattice parameters of the compound Li2VOSiO4, which crystallises with a natisite-type structure, has been carried out to a pressure of 8.54(5) GPa at room temperature. Unit-cell volume data were fitted with a second-order Birch-Murnaghan EoS (BM-EoS), simultaneously refining V0 and K0 using the data weighted by the uncertainties in V. The bulk modulus is K0 = 99(1) GPa, with K′ fixed to 4. Refinements of third order equations-of-state yielded values of K′ that did not differ significantly from 4. The compressibility of the unit-cell is strongly anisotropic with the c axis (K0(c) = 49.7 ± 0.5 GPa) approximately four times more compressible than the a axis (K0(a) = 195 ± 3 GPa).
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页码：71 / 76
页数：5
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