The crystal structure of kukisvumite, Na6ZnTi4(Si2O6)4O4 · 4H2O

2000 ◽  
Vol 215 (6) ◽  
Author(s):  
M. Pasero ◽  
St. Merlino ◽  
O. Ferro
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Kola Peninsula ◽  
Crystal Data ◽  
Space Group ◽  
X Ray

The crystal structure of kukisvumite, a rare mineral from Kola peninsula, Russia, has been refined in the Pccn space group with X-ray single-crystal data to R = 0.055. Kukisvumite, ideally Na

scholarly journals Darstellung und Kristallstruktur der Verbindungen MnCuX (X = P, As, PxAs1-x) / Preparation and Crystal Structure of Compounds MnCuX (X = P, As, PxAs1-x)

1992 ◽  
Vol 47 (7) ◽  
pp. 925-928 ◽  
Author(s):  
Joachim Mündelein ◽  
Hans-Uwe Schuster
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Magnetic Measurements ◽  
Crystal Data ◽  
Melting Points ◽  
Space Group ◽  
X Ray ◽  
Ternary Compounds ◽  
Antiferromagnetic Ordering

Three new ternary compounds MnCuP, MnCuP0.5As0.5 and MnCuAs have been prepared and characterized by X-Ray, DTA and magnetic measurements. They crystallize orthorhombically in the space group P nma (No. 62). The structures were calculated from single crystal data. The melting points were determined by DTA measurements (MnCuP: 1090°C; MnCuP0.5As0.5: 1000 °C; MnCuAs: 950 °C). MnCuAs appears to show an antiferromagnetic ordering up to 295 K.

Crystal data for Cu2Th4(MoO4)9 and isostructural compounds

1998 ◽  
Vol 13 (2) ◽  
pp. 107-112 ◽  
Author(s):  
S. Launay ◽  
M. Quarton
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Chemical Study ◽  
Crystal Data ◽  
Space Group ◽  
X Ray

Cu2Th4(MoO4)9 is cubic: a=14.4856(1) Å, space group I4¯3d, Z=4. Its crystal structure was recently determined using a single crystal. The results of chemical study allow one to reject the existence of Li4Th7(MO4)16 and La(MO4)(ReO4) compounds with M=Mo, W, reported as isostructural with Cu2Th4(MoO4)9. Precise X-ray powder patterns are established for Cu2Th4(MoO4)9 and isotypic compounds Li2Th4(MoO4)9, Li2Th4(WO4)9, and La4(MoO4)3(ReO4)6.

Schwermetall-π-Komplexe II [1] Arenkomplexe des Quecksilbers(I)

1987 ◽  
Vol 42 (7) ◽  
pp. 828-834 ◽  
Author(s):  
W. Frank ◽  
B. Dincher
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Diffraction Data ◽  
Monoclinic Space Group ◽  
Crystal Data ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Aluminium Trichloride

Abstract The crystalline compounds [(CH3C6H5)2Hg,][AlCl4]2 (1), [(1,2-(CH3)2C6H4)2Hg2][AlCl4]2(2), [(1,3,5-(CH3)3C6H3)2Hg2][AlCl4]2 (3), [1,2,4,5-(CH3)4C6H2Hg2][AlCl4]2 (4) and [((CH3)6C6)2Hg2][AlCl4]2-CH3C6H5 (5) have been prepared from mercury(I)chloride, aluminium trichloride and the corresponding arenes and characterized by elem ental analysis. The crystal structure of 5 has been determ ined from single crystal X-ray diffraction data and refined to R - 0.093 for 3269 unique reflections. Crystal data: monoclinic, space group P21/c, a = 2116(1), b = 1095.1(7), c = 1880(1) pm, β - 104,9(1)°, Z = 4. Each atom of a central Hg2 unit (Hg -Hg distance 251.5 pm) is asymmetrically complexed by hexamethylbenzene, the Hg - Carene distances being in the range from 241 to 340 pm. Two distorted AlCl4 tetrahedra complete a “molecular” [arene2Hg2][AlCl4]2 unit. The shortest Hg-Cl distances are 310 and 312 pm, respectively.

Crystal structure of Sc3Co1.64In4 and Sc10Co9In20 from single-crystal data

2019 ◽  
Vol 74 (3) ◽  
pp. 289-295 ◽  
Author(s):  
Nataliya Gulay ◽  
Yuriy Tyvanchuk ◽  
Marek Daszkiewicz ◽  
Bohdan Stel’makhovych ◽  
Yaroslav Kalychak
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Crystal Structures ◽  
Diffraction Data ◽  
Crystal Data ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Arc Melting ◽  
Pure Metals

AbstractTwo compounds in the Sc-Co-In system were obtained by arc-melting of the pure metals and their crystal structures have been determined using single crystal X-ray diffraction data. The structure of Sc3Co1.64In4 (space group P6̅, а=7.6702(5), c=3.3595(2) Å, Z=1, R1=0.0160, wR2=0.0301) belongs to the Lu3Co2−xIn4 type structure, which is closely related to the ZrNiAl and Lu3CoGa5 types. The structure of Sc10Co9In20 (space group P4/nmm, а=12.8331(1), c=9.0226(1) Å, Z=2, R1=0.0203, wR2=0.0465) belongs to the Ho10Ni9In20 type, which is closely related to HfNiGa2.

Crystal Structure of the New Ternary Antimonide Ho5GaSb3

2009 ◽  
Vol 64 (8) ◽  
pp. 909-914 ◽  
Author(s):  
Iryna Antonyshyn ◽  
Olga Zhak ◽  
Stepan Oryshchyn ◽  
Volodymyr Babizhetskyy ◽  
Constantin Hoch ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Structure Type ◽  
Crystal Data ◽  
Space Group ◽  
X Ray ◽  
Partially Ordered ◽  
Data Space ◽  
Ternary Derivative

The crystal structure of the new ternary antimonide Ho5GaSb3 has been determined from X-ray single-crystal data: space group Pnma, a = 7.9667(8), b = 15.128(2), c = 7.9616(8) Å , V = 959.5(3) Å3, Z = 4, RF = 0.059, Rw = 0.066 for 9020 reflections. The crystal structure of Ho5GaSb3 is a ternary derivative of the Sm5Ge4 structure type with partially ordered distribution of gallium and antimony atoms

Evidence of a centre of symmetry: redetermination of Ni2.60Te2 from single-crystal data

2007 ◽  
Vol 63 (11) ◽  
pp. i188-i188 ◽  
Author(s):  
L. D. Gulay ◽  
M. Daszkiewicz ◽  
A. Pietraszko
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Title Compound ◽  
Previous Investigation ◽  
Crystal Data ◽  
Interatomic Distances ◽  
Space Group ◽  
X Ray ◽  
The Subject ◽  
Atomic Coordinates

The crystal structure of the title compound, nickel telluride, with composition Ni2.60Te2, has been the subject of a previous investigation based on X-ray powder data, when a slightly different composition of Ni2.58Te2 was determined [Gulay & Olekseyuk (2004). J. Alloys Compd, 376, 131–138]. In contrast to the previous refinement in the space group Pmc21, the redetermination from single-crystal data reveals a centre of symmetry and the structure was refined in the space group Pnma with improved precision for the atomic coordinates and interatomic distances. The structure can be described as a c × a × (3a)1/2 distorted orthorhombic variant of the hexagonal Ni1.10Se0.16Te0.74 structure. All atoms are situated on mirror planes.

scholarly journals Preparation, characterization and crystal structure of the complex formed between N,N,N',N'-tetrabutylmalonamide and lanthanum(III)nitrate

2006 ◽  
Vol 71 (5) ◽  
pp. 513-519 ◽  
Author(s):  
Y.U. Cui ◽  
Guo-Xin Sun ◽  
Zhen-Wei Zhang ◽  
Si-Xiu Sun
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Extraction Method ◽  
Crystal Data ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Nitrate Ions ◽  
Triclinic System ◽  
Oxygen Atoms

The complex [La(NO 3)3(TBMA)2] (TBMA = N,N,N?,N?-tetrabutylmalonamide) was prepared by the extraction method and characterized by single-crystal X-ray diffraction. The complex consists of two bidentate TBMA extractant and three bidentate nitrate ions coordinated to a La3+ ion. The lanthanum(III) is 10-coordinate, being bonded to four oxygen atoms of the malonamides and six oxygen atoms of the three nitrates. The crystal data are as follows C38H76N7O13La, Mr = 977.97, triclinic system, space group P 1, a = 1.3025(12), b = 1.4353(14), c = 0.4871(13) nm, ? = 70.025(17), ? = 71.411(19), ? = 84.017(18)?, V = 2.476(4) nm3, Z = 2, F(000) = 1028, D = 1.312 g.cm-3, R 1 = 0.0833, wR 2 = 0.1471.

Synthesis and Crystal Structure of 1-(2R,3S,4R,5R)-3-fluoro-4-hydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-5-iodopyrimidine-2,4(1H,3H)-dione

2014 ◽  
Vol 997 ◽  
pp. 196-199
Author(s):  
Wei Li ◽  
Qiang Xiao ◽  
Ru Chun Yang
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Title Compound ◽  
Nmr Spectra ◽  
Crystal Data ◽  
Single Crystal Diffraction ◽  
Monoclinic System ◽  
Synthesis And Crystal Structure ◽  
Space Group ◽  
X Ray

The title compound, 1-(2R,3S,4R,5R)-3-fluoro-4-hydroxy-5-(hydroxymethyl) tetrahydrofuran-2-yl)-5-iodopyrimidine-2,4(1H,3H)-dione , C9H10FIN2O5, as potential drugs for anti-tumor, anti-viral have been synthesized and characterized by NMR spectra. Meanwhile, the crystal of 2b was obtained and determined by X-ray single-crystal diffraction. Crystal data: monoclinic system, space group P2(1),a= 9.0832(11) Ǻ,b= 5.4332(7) Ǻ,c= 12.2464(15) Ǻ,β= 107.809(4)°,V= 575.41(12) Ǻ3,Z= 2,F(000) = 360,Dx= 2.148 Mg m-3,μ= 2.813 mm-1,R= 0.014 andwR= 0.056 for 1988 independent reflections (Rint= 0.0209) and 1932 observed ones (I > 2σ (I)).

Preparation and Crystal Structure of New 1,3-Diaza-λ5,λ5-diphosphetidines

1986 ◽  
Vol 41 (10) ◽  
pp. 1201-1205 ◽  
Author(s):  
Ch. Donath ◽  
M. Meisel ◽  
K .-H . Jost ◽  
K. K. Palkina ◽  
S. I. Maksimova ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Methyl Ester ◽  
Single Crystal ◽  
Fractional Crystallization ◽  
Crystal Data ◽  
X Ray Diffraction ◽  
Triclinic Space Group ◽  
Space Group ◽  
X Ray ◽  
Benzyl Amine

Abstract Reaction of py · PS2Cl (py = pyridine) with benzyl amine in the presence of NEt3 yields triethyl-ammonium 1,3-dibenzyl-2,4-dithioxo-1,3-diaza-2λ5,4λ5-diphosphetidine-2,4-dithiolate which reacts with MeI to give the corresponding methyl ester. By fractional crystallization from cyclohexane three modifications of the methyl ester were obtained (two trans-(A and A') and one cis-modification (B)). The crystal structure of these modifications have been determined by single crystal X-ray diffraction. Crystal data: A: triclinic, space group P1̄ , Z = 2, a = 7.100(3), b = 10.088(6), c = 17.785(6) Å , α = 99.18(4)°, β = 93.75(5)°, γ = 106.96(4)°, A': monoclinic, P21/c, Z = 2, a = 7.933(3), b = 13.689(3), c = 9.917(4) Å, β = 111.98(3)°; B: orthorhombic, P cab, Z = 8, a = 12.962(6), b = 16.581(6), c = 19.475(7).

scholarly journals Indole type akuammiline from Vinca erecta: Crystal structure of 10-OAc-Akuammine

2019 ◽  
Vol 10 (4) ◽  
pp. 345-349 ◽  
Author(s):  
Shahobiddin Adizov ◽  
Bakhodir Tashkhodjaev
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Absolute Configuration ◽  
Indole Alkaloids ◽  
Acyl Derivative ◽  
Crystal Data ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
Space Group ◽  
X Ray

Single crystal X-ray diffraction has established the absolute configuration of the indole alkaloids from Vinca erecta such as akuammiline-o-acyl derivative of akuammine with a 3D stable polycyclic framework. Crystal data for C24H28N2O5: orthorhombic, space group P212121 (no. 19), a = 7.349(3) Å, b = 16.099(5) Å, c = 17.323(5) Å, V = 2049.5(12) Å3, Z = 4, T = 293(2) K, μ(CuKα) = 0.789 mm-1, Dcalc = 1.376 g/cm3, 1742 reflections measured (7.496° ≤ 2Θ ≤ 119.792°), 1742 unique (Rsigma = 0.0374) which were used in all calculations. The final R1 was 0.0608 (I > 2σ(I)) and wR2 was 0.1680 (all data). The polycyclic framework of the well-known picrinine and akuammine is compared. The ether bridges located in different positions of the framework and forming five-membered cycles do not change the conformation of the polycyclic akuammiline framework. In V. erecta alkaloids, the exomethylene fragment (C18-C19=C20-C21) of the polycyclic backbone always takes on the E-condition.

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