Two-beam coupling gain enhancement is demonstrated for a nontraditional orientation of counterpropagating waves in the monoclinic crystal Sn2P2S6.

A second, monoclinic, polymorph of the title compound, C(14)H(8)Cl(2), has been found. In addition to the structure of this monoclinic form, the structure of the previously described orthorhombic form [Desvergne, Chekpo & Bouas-Laurent (1978). J. Chem. Soc. Perkin Trans. 2, pp. 84-87; Benites, Maverick & Fronczek (1996). Acta Cryst. C52, 647-648] has been redetermined at low temperature and usi...

Two different crystal forms of human thioredoxin peroxidase-B have been grown by vapour diffusion using polyethylene glycol 400 as a precipitant. Monoclinic P21 crystals were grown from freshly purified protein, whilst orthorhombic P212121 crystals were grown from purified protein that had been stored in ammonium sulfate, but otherwise under the same conditions. The diffraction from both crysta...

The crystal structure of barbituric acid dihydrate (C4H4N2O3*2H2O) has twice been reported as orthorhombic, space group Pnma, with all atoms (except for CH(2) H atoms) lying on the mirror plane [Al-Karaghouli et al. (1977). Acta Cryst. B33, 1655-1660; Jeffrey et al. (1961). Acta Cryst. 14, 881-887]. The present study has found that at low temperatures, below 200 K, the crystal structure is no l...

The crystal structure of the title compound, [C(NH(2))(3)](6)[Mo(7)O(24)]·H(2)O, previously determined at room temperature in the monoclinic space group C2/c from Weissenberg techniques [Don & Weakley (1981 ▶). Acta Cryst. B37, 451-453], has been redetermined from low-temperature single-crystal data in the monoclinic space group P2(1)/c. The asymmetric unit contains one hepta-molybdate anion, s...

Sr6Nb10O30–Nb2O5 nanocomposite was synthesized in 2M NaOH aqueous solution. A stoichiometric 1:1 Sr:Nb molar ratio hydrothermal method at 120°C was used to synthesize this nanocomposite. Sr(NO3)2 and Nb2O5 were used as raw materials. The synthesized nanomaterials were characterized by powder X-ray diffraction (PXRD) technique. It was found that Sr6Nb10O30 was crystallized in tetragonal crystal ...

The evolution of the geometric and electronic structures within the entire series of lanthanide orthophosphate nanoparticles ( approximately 2- approximately 5 nm) has been determined experimentally with X-ray diffraction and near edge X-ray absorption fine structure spectroscopy. In particular, the interplay between electronic structure, crystal morphology, and crystal phase has been systemati...

The crystal structure of the title chiral Schiff base compound (E)-3,4-dimethoxy[(1-phenylethyl)iminomethyl]bezyne (1) was determined by single-crystal X-ray diffraction data. The title compound was further characterized by elemental analyses (CHN), FT-IR, 1H-NMR and UV-Vis spectroscopic techniques. It crystallizes in the monoclinic space group P21 with unit cell parameters: a = 19.0121 (2), b...

A complex of N, N, N', N', -tetramethylated ethylenediamine, TMEDA, with CuCI is prepared. The crystal and molecular structure of this complex is characterized by a single-crystal X-ray diffraction study. The complex is found to contain [Cu (TMEDA) ] cation which is nearly tetrahedral and the [CuCI ) anion is linear which Cu lies on a center of symmetry. Crystals are monoclinic space grou...