Accurate Debye–Waller factors of ⁷LiH and ⁷LiD by neutron diffraction at three temperatures

Reactivity of hydrogen and ternary nitrides containing lithium and 13 group elements

“…This pattern consists of the peaks from GaN, LiNH 2 , and LiH, and very small peaks of Li 3 GaN 2 . The peak positions and relative intensities of LiNH 2 and LiH agreed with the reported values [13,14]. The XRD pattern shown in Fig.…”

Heat capacities of polycrystalline nLiH and nLiD by differential scanning calorimetric method

“…Extensive studies on elastic parameters [6][7][8][9][10][11], lattice parameters and thermal expansion coefficients [11][12][13][14][15][16][17][18][19][20][21][22], specific heats and Debye temperatures [21][22][23][24][25][26][27][28][29][30][31] have been carried out both for LiH and LiD by many investigators. Experimental and theoretical investigation on the other physico-chemical properties of isotopic lithium hydride has been carried out by many researchers [16][17][18]20,[32][33][34][35][36][37][38][39][40][41][42][43][44]. However, these studies are limited to narrow temperature ranges, preferably sub-ambient temperatures and on single crystals.…”

Evidence on the breakdown of the Born-Oppenheimer approximation in the charge density of crystalline 7LiH/D

“…The single-crystal samples of 7LiI-I and 7LiD for the X-ray diffraction measurements were cut parallel to the {001} crystal faces from the same crystalline discs as the samples for the neutron diffraction study by Vidal & Vidal-Valat (1986) -synthesis of the crystals and preparation of the discs have been reported in detail in that context. The original crystal boules had been kindly provided by Dr Mathew C. Delong, University of Utah.…”

“…It is possible to include the scale factor in the Fourier refinement and it is, in fact, included in our refinement program referred to as the iterative procedure (Vidal & Vidal-Valat, 1986), while the possibility to include any extinction parameters has not been studied. The potential presence of significant extinction therefore makes the use of least-squares fitting necessary -we use the LINEX program by Becker & Coppens (1975 Hurst (1959).]…”