ISSN:
1600-5767
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Geosciences
,
Physics
Notes:
X-ray powder diffraction data for BeGa2O4 have been obtained from the synthesized compound. The space group was determined by using a hexagonal prismatic single crystal obtained from a lead pyrophosphate flux by slow cooling. The crystal of BeGa2O4 belongs to the hexagonal system, with unit-cell parameters a = 7.7525(3), c = 2.9817(2) Å, V = 155.19; space group P63 or P63/m, z = 2. The crystal lattice is isomorphous with β-Si3N4.BeGa2O4 melts at 2013 K and has fairly small thermal expansion coefficients: α//a = 3.29 × 10− 6 K−1, α//c = 2.95 × 10− 6 K−1 (298–1173 K average). Dm = 4.511 Mg m−3 (323 K), Dx = 4.546 Mg m−3 (298 K); Cu Kα, Cu Kα radiation. The JCPDS Diffraction File No. for BeGa2O4 is 36-1493.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0021889885010500
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