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2004
Structure
D 2000
44- 006
Single-Crystal X-Ray Diffraction Study of α-Quartz-Type Al 1-xGaxPO4. — Single
crystals of the title compounds are synthesized hydrothermally from solutions of AlPO4
and GaPO4 in aq. H2SO4. Al1-xGa xPO 4 with x = 0.42 crystallizes in the hexagonal space
group P3121 with Z = 3, whereas the compounds with x = 0.25 and x = 0.71 crystallize
in the hexagonal space group P3221 with Z = 3. The details of the crystal structures, and
in particular, the intertetrahedral bridging angle and the tetrahedral tilt angle, vary in an
essentially linear manner with Ga content. Thus it seems to be possible to tune the
piezoelectric properties of these materials by varying the chemical composition. —
(HAINES*, J.; CAMBON, O.; CACHAU-HERREILLAT, D.; FRAYSSE, G.;
MALLASSAGNE, F. E.; Solid State Sci. 6 (2004) 9, 995-999; Lab. Physicochim.
Matiere Condens., CNRS, Univ. Montpellier II, F-34095 Montpellier, Fr.; Eng.) —
W. Pewestorf
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