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Apophyllite from the Poona region of the Deccan Traps has been confirmed to be tetragonal, space group P4/mnc, a = 8.965 (3), c = 15.756 (7) Å, at 25°C, Z = 2 and measured density = 2.369 g cm−3 at 33°C. Complete powder data and chemical analysis are given.
Single crystals of Bi–Sb alloys were etched in transverse magnetic fields ranging from 1000 to 4000 gauss. It has been shown from the study of the etch pattern on the oppositely matched cleavage faces and from successive etching that the dislocations move in the magnetic field.
Crystal data for TPPO and BDPPO complexes with cobalt (II) thiocyanate, space group R32 (a = 17.50±0.06 Å, b = 30.99±0.08 Å) and Pbcn (a = 10.10±0.01 Å; b = 20.22±0.03 Å; c= 18.94±0.01 Å), respectively, suggest C2 as the only compatible symmetry for both complexes. Optical, morphological and...
The sign of the total pyroelectric coefficient, p3, of LiIO3 has been related to the known Morosin, 1972. Private communication quoted as Ref. 25 of Bergman, J. G. & Crane, G. R. (1974). J. Chem. Phys. 60, 2470-2474 absolute configuration by use of a model of Liminga & Abrahams J. Appl. Cryst....
The absolute polarity of single crystals of α‐Cu(IO3)2 and Nd(IO3)3.H2O, determined by anomalous X‐ray scattering techniques, has been related to the sense of the piezoelectric d22 and pyroelectric p2 coefficients in these monoclinic crystals. The absolute sense of d22 in both cases is...
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