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A 10 9 high‐pressure cell for X‐ray and optical measurements
Author(s) -
Leszczynski M.,
Podlasin S.,
Suski T.
Publication year - 1993
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889892006009
Subject(s) - lattice constant , compressibility , diffraction , bulk modulus , x ray , lattice (music) , cylinder , diamond anvil cell , bond length , diamond , reflection (computer programming) , materials science , optics , crystallography , x ray crystallography , high pressure , chemistry , thermodynamics , crystal structure , physics , composite material , geometry , programming language , mathematics , computer science , acoustics
The construction of a new high‐pressure cell is presented. It is a piston‐cylinder type of apparatus. The entrance and exit of X‐rays or light are possible through two parallel diamond‐plate windows placed on V‐shaped slits covering almost the whole range of reflection angles. This makes the cell particularly suitable for X‐ray diffraction examinations of monocrystals. The potential accuracy of absolute‐bulk‐modulus determination by lattice‐constant measurements using the Bond method [Bond (1960). Acta Cryst . 13 , 814–816] at pressures of 10 8 –10 9 Pa can be estimated at 1–2%. The cell enables the simultaneous examination of two samples, which makes possible the comparison of their compressibilities with an accuracy of 0.01–0.1%. As examples, the results of compressibility measurements on GaAs and GaN are given.