On the determination of linear thermal expansion coefficients of triclinic crystals using X-ray diffraction
Paufler, Peter; Weber, Thomas
European Journal of Mineralogy Volume 11 Number 4 (1999), p. 721 - 730
published: Jul 16, 1999
manuscript accepted: Mar 16, 1999
manuscript received: Mar 18, 1998
ArtNo. ESP147051104011, Price: 29.00 €
Abstract The representation of all components of the tensor of linear thermal expansion by temperature derivatives of lattice parameters α, b, c, α, β, and γ has been extended to triclinic symmetry. The advantages of this approach are elucidated by taking data of α-CuMoO4 as an example. The uncertainty due to various influences including the approximation of a(T), b(T), ... by power series is discussed quantitatively. Thermal expansion coefficients of triclinic crystals seem to be particularly sensitive to the exact procedure of their evaluation.