TY - JOUR
T1 - Compression of lithium fluoride to 92 GPa
AU - Dong, Haini
AU - Dorfman, Susannah M.
AU - Holl, Christopher M.
AU - Meng, Yue
AU - Prakapenka, Vitali B.
AU - He, Duanwei
AU - Duffy, Thomas S.
PY - 2014/1/2
Y1 - 2014/1/2
N2 - The equation of state and compression behavior of lithium fluoride, LiF, have been determined to 92 GPa by X-ray diffraction in a diamond anvil cell. A neon pressure-transmitting medium was used to minimize the effect of differential stress on the sample. Consistent results using multiple pressure standards were obtained. By fitting the pressure-volume data to a Birch-Murnaghan equation of state, the isothermal bulk modulus and its corresponding pressure derivative at zero pressure were determined to be K 0=70.1±0.7 GPa, and K′0=4.3±0.1. If the bulk modulus is fixed at 66.2 GPa, a value well constrained by independent elasticity measurements, we obtain K′0=4.6±0.1. The bulk modulus and its pressure derivative obtained from this work resolve the large discrepancy in previously reported values of K0 and K′0 for this material. Consequently, the equation of state of LiF is now sufficiently well constrained to allow its use as a pressure calibrant in high pressure experiments.
AB - The equation of state and compression behavior of lithium fluoride, LiF, have been determined to 92 GPa by X-ray diffraction in a diamond anvil cell. A neon pressure-transmitting medium was used to minimize the effect of differential stress on the sample. Consistent results using multiple pressure standards were obtained. By fitting the pressure-volume data to a Birch-Murnaghan equation of state, the isothermal bulk modulus and its corresponding pressure derivative at zero pressure were determined to be K 0=70.1±0.7 GPa, and K′0=4.3±0.1. If the bulk modulus is fixed at 66.2 GPa, a value well constrained by independent elasticity measurements, we obtain K′0=4.6±0.1. The bulk modulus and its pressure derivative obtained from this work resolve the large discrepancy in previously reported values of K0 and K′0 for this material. Consequently, the equation of state of LiF is now sufficiently well constrained to allow its use as a pressure calibrant in high pressure experiments.
KW - X-ray diffraction
KW - equation of state
KW - lithium fluoride
UR - http://www.scopus.com/inward/record.url?scp=84896392154&partnerID=8YFLogxK
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U2 - 10.1080/08957959.2013.878932
DO - 10.1080/08957959.2013.878932
M3 - Article
AN - SCOPUS:84896392154
SN - 0895-7959
VL - 34
SP - 39
EP - 48
JO - High Pressure Research
JF - High Pressure Research
IS - 1
ER -