Crystal structure of the Ca{sub 3}TaGa{sub 3}Si{sub 2}O{sub 14} compound

Journal Article · Thu Mar 15 00:00:00 EDT 2007 · Crystallography Reports

DOI:https://doi.org/10.1134/S1063774507020083· OSTI ID:21090953

Klimenkova, A A ^[1]; Molchanov, V N ^[2]; Mill', B V ^[1]; Rabadanov, M H; Pisarevsky, Yu V ^[2]; Pushcharovsky, D Yu ^[1]

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1. Moscow State University (Russian Federation)
2. Russian Academy of Sciences, Shubnikov Institute of Crystallography (Russian Federation)

The absolute crystal structure of the Ca{sub 3}TaGa{sub 3}Si{sub 2}O{sub 14} piezoelectric compound is refined using X-ray diffraction analysis. The unit cell parameters and final R factors are as follows: a = 8.112(1) A, c = 4.9862(6) A, space group P321, Z = 1, R = 0.98%, and R{sub w} = 1.42%. It is shown that the configuration of the absolute crystal structure inherited from the seed material determines the positive sense of the optical activity of the crystal under investigation. The structural and acoustical characteristics of the Ca{sub 3}TaGa{sub 3}Si{sub 2}O{sub 14} crystals are compared with those of the La{sub 3}Ga{sub 5}SiO{sub 14} crystals.

• OSTI ID: 21090953
• Journal Information: Crystallography Reports, Vol. 52, Issue 2; Other Information: DOI: 10.1134/S1063774507020083; Copyright (c) 2007 Nauka/Interperiodica; Article Copyright (c) 2007 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7745
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CALCIUM COMPOUNDS
CRYSTALS
GALLIUM COMPOUNDS
OPTICAL ACTIVITY
OXIDES
PIEZOELECTRICITY
R FACTORS
SILICON COMPOUNDS
SPACE GROUPS
THALLIUM COMPOUNDS
TRIGONAL LATTICES
X-RAY DIFFRACTION