Hydrogen-bonding properties of galanthamine: an investigation through crystallographic database observations and computational chemistry [0.03%]
雪花碱的氢键性质：通过晶体学数据库观察和计算化学研究
Soleymane Koné,Nicolas Galland,El Hadji Sawaliho Bamba et al.
Soleymane Koné et al.
The hydrogen-bonding properties of galanthamine have been investigated experimentally from a thorough analysis of crystallographic data retrieved from the Protein Data Bank and Cambridge Structural Database databases and theoretically throu...
Carla Slebodnick,Ross J Angel,Brian E Hanson et al.
Carla Slebodnick et al.
Octakis(trivinylsilyl)octasilicate was prepared by capping octaspherosilicate cubes, [Si(8)O(20)](8-), with trivinylsilyl groups in methanol solution. Crystals grown from CCl(4) crystallize in the tetragonal space group I4(1). Systematic ab...
Five-coordinate copper(II) complexes: crystal structures, spectroscopic properties and new extended structural pathways of [Cu(chelate)2X]Y, where chelate = dpyam, phen and bipy; X = pseudohalide ligands [0.03%]
五配位铜（II）配合物：晶体结构，光谱性质及[dpyam/phen/bipy铜(伪卤素)]的扩展结构路径（dpyam=2,6-二（咪唑-1-基甲基）吡啶；phen = 1,10-菲啰啉；bipy = 2,2’-联吡啶）
Sujittra Youngme,Pongthipun Phuengphai,Chaveng Pakawatchai et al.
Sujittra Youngme et al.
The crystal structures of four distortion isomers of the [Cu(chelate)(2)X](+) cation, where chelate = 2,2-bipyridine (bipy), 1,10-phenanthroline (phen) and di-2-pyridylamine (dpyam), X = a pseudohalide ligand (NCO, NCS, N(3) and C(2)N(3)), ...
Iain J Maley,Daniel H Brown,Richard M Ibberson et al.
Iain J Maley et al.
The low-temperature crystal structures of perdeuterogermane (m.p. 108 K) and perdeuterostannane (m.p. 123 K) are reported. The structures have been characterized from low-temperature (5 K) high-resolution neutron powder diffraction experime...
Orientational disorder in crystals of (NH4)3MoO3F3 and (NH4)3WO3F3 [0.03%]
(NH4)3MoO3F3和(NH4)3WO3F3晶体中的取向无序现象
A A Udovenko,N M Laptash
A A Udovenko
Triammonium trioxotrifluoromolybdate (NH(4))(3)MoO(3)F(3) (I) and trioxotrifluorotungstate (NH(4))(3)WO(3)F(3) (II) were synthesized in a single-crystal form and their structures were refined by X-ray diffraction. These two isostructural co...
A bond-valence investigation of two series of isostructural lanthanide compounds [0.03%]
两系列同构稀土化合物的配位价研究
F Liebau,X Wang
F Liebau
Since the days of Pauling it has been tacitly assumed that the valence, which is distributed between the bonds to neighbouring atoms, is the stoichiometric valence, (stoich)V, which has integer values. It is shown here that this is not true...
Structure and electron density of oxysulfide Sm2Ti2S2O4.9, a visible-light-responsive photocatalyst [0.03%]
二氧化硫系复合氧化物Sm₂Ti₂S₂O₄·9的晶体结构及其电子密度分布研究
Masatomo Yashima,Kiyonori Ogisu,Kazunari Domen
Masatomo Yashima
We report the crystal structure and electron density of samarium titanium oxysulfide, Sm(2)Ti(2)S(2)O(4.9), photocatalyst obtained through the Rietveld analysis, maximum-entropy method (MEM) and MEM-based pattern fitting of the high-resolut...
A Shalimov,M T Borowiec,T Zayarnyuk et al.
A Shalimov et al.
Potassium yttrium tungstate is a monoclinic crystal with space group C2/c. The specific X-ray investigations presented in this article determine the coherence scattering length for this crystal. The scattering profiles were obtained using a...
Structural analysis of perovskite LaCr1 - xNixO3 by Rietveld refinement of X-ray powder diffraction data [0.03%]
基于X射线粉末衍射数据的Rietveld细化研究钙钛矿型LaCr_{1-x}Ni_xO_3结构
J Yang
J Yang
The crystal structure of perovskite LaCr(1 - x)Ni(x)O(3) (0 < or = x < or = 1.0) has been systematically investigated by analyzing X-ray powder-diffraction data taken at room temperature. Rietveld refinement has confirmed the structural evo...
Jeppe Christensen,Sven Lidin,Bernard Malaman et al.
Jeppe Christensen et al.
In the Er-Ge system, the compostion range ErGe(2) to Er(2)Ge(3) has been investigated. Eight samples were produced by arc melting of the elements, and analyzed using X-ray powder diffraction. Nine crystal structures were found to be present...