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X-ray diffraction investigations of CaF2 at high pressure (1992)

Gerward, L. ; Olsen, J. S. ; Steenstrup, S. ; [et al.]

Copenhagen : International Union of Crystallography (IUCr)

Applied crystallography online 25 (1992), S. 578-581

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ISSN: 1600-5767

Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001

Topics: Geosciences , Physics

Notes: Synchrotron-radiation X-ray diffraction studies of CaF2 at high pressures have been performed on a powder sample up to 45 GPa and on a single-crystal sample up to 9.4 GPa. The bulk modulus of the low-pressure phase was determined to be B0 = 87 (5) GPa. A phase transition was observed at about 9.5 GPa. The transition is accompanied by a volume contraction of 11%. The high-pressure phase is orthorhombic PbCl2 type (space group Pbnm). The sample only partially reverts to the low-pressure phase upon release of pressure.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1107/S0021889892004096

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