TY - JOUR
T1 - Structure and compressibility of synthetic ZnAl2O4 (gahnite) under high-pressure conditions, from synchrotron X-ray powder diffraction
AU - Levy, D.
AU - Pavese, A.
AU - Sani, A.
AU - Pischedda, V.
PY - 2001
Y1 - 2001
N2 - The structural behavior of synthetic gahnite (ZnAl2O4) has been investigated by X-ray powder diffraction at high pressure (0-43 GPa) and room temperature, on the ID9 beamline at ESRF. The equation of state of gahnite has been derived using the models of Birch-Murnaghan, Vinet and Poirier-Tarantola, and the results have been mutually compared (the elastic bulk modulus and its derivatives versus P determined by the third-order Birch-Murnaghan equation of state are K0 = 201.7(±0.9) GPa, K10 = 7.62(±0.09) and K110 = -0.1022 GPa-1 (implied value). The compressibilities of the tetrahedral and octahedral bond lengths [0.00188(8) and 0.00142(5) GPa-1 at P = O, respectively], and the polyhedral volume compressibilities of the four- and sixfold coordination sites [0.0057(2) and 0.0041 (2) GPa-1 at P = O, respectively] are discussed.
AB - The structural behavior of synthetic gahnite (ZnAl2O4) has been investigated by X-ray powder diffraction at high pressure (0-43 GPa) and room temperature, on the ID9 beamline at ESRF. The equation of state of gahnite has been derived using the models of Birch-Murnaghan, Vinet and Poirier-Tarantola, and the results have been mutually compared (the elastic bulk modulus and its derivatives versus P determined by the third-order Birch-Murnaghan equation of state are K0 = 201.7(±0.9) GPa, K10 = 7.62(±0.09) and K110 = -0.1022 GPa-1 (implied value). The compressibilities of the tetrahedral and octahedral bond lengths [0.00188(8) and 0.00142(5) GPa-1 at P = O, respectively], and the polyhedral volume compressibilities of the four- and sixfold coordination sites [0.0057(2) and 0.0041 (2) GPa-1 at P = O, respectively] are discussed.
KW - EoS
KW - Structural behaviour at HP
KW - Synthetic-gahnite
UR - http://www.scopus.com/inward/record.url?scp=0034751339&partnerID=8YFLogxK
U2 - 10.1007/s002690100194
DO - 10.1007/s002690100194
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AN - SCOPUS:0034751339
SN - 0342-1791
VL - 28
SP - 612
EP - 618
JO - Physics and Chemistry of Minerals
JF - Physics and Chemistry of Minerals
IS - 9
ER -