Zur Kenntnis von EuBeGd2O5 mit einem Beitrag über Phasen der Zusammensetzung M1-xM′xBeLn2O5: Ca0,4Sr0,6BeSm2O5, Ba0,25Ca0,75BeNd2O5 und Ba0,36Sr0,64BeNd2O5 / On EuBeGd2O5 and on Phases of the Composition M1-xM′xBeLn2O5: Ca0,4Sr0,6BeSm2O5, Ba0,25Ca0,75BeNd2O5 and Ba0,36Sr0,64BeNd2O5

1994 ◽  
Vol 49 (7) ◽  
pp. 919-922 ◽  
Author(s):  
Hk. Müller-Buschbaum ◽  
S. Frenzen
Keyword(s):  
Single Crystals ◽  
Plasma Torch ◽  
Monoclinic Space Group ◽  
Orthorhombic Symmetry ◽  
Laser Technique ◽  
Space Group

Abstract Single crystals of (I): EuBeGd2O5, (II): Ca0,4Sr0,6BeSm2O5, (III): Ba0,25Ca0,75BeNd2O5 and (IV): Ba0.36Sr0.64BeNd2O5 were prepared by (I): plasma torch and (II)-(IV ): CO2-LASER technique. X-Rayo investigations lead to (I) monoclinic (space group C52h-P21/c, a = 7.126, b = 6.457, c = 9.394 Å , β = 90.40°) and (II)-(IV) orthorhombic symmetry (D162h-Pnma). (II: a = 9.454, b = 7.142, c = 6.490 Å; III: a = 9.508, b = 7.188, c = 6.531 Å; IV: a = 9.642, b = 7.295, c = 6.614 Å). In contrary to the phases M1-xM′xBeLn2O5, EuBeGd2O5 is characterized by an ordered distribution of Eu2+ and Gd3+ inside of the Kagomé network.

Two lithium tricyanomethanide compounds: syntheses and single-crystal structure determination of LiK[C(CN)3]2 and Li[C(CN)3]·½ (H3C)2CO

2015 ◽  
Vol 70 (3) ◽  
pp. 191-196 ◽  
Author(s):  
Olaf Reckeweg ◽  
Francis J. DiSalvo
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Single Crystals ◽  
Structure Determination ◽  
Monoclinic Space Group ◽  
Orthorhombic Space Group ◽  
Space Group ◽  
Cell Parameters ◽  
New Compounds

AbstractThe new compounds LiK[C(CN)3]2 and Li[C(CN)3]·½ (H3C)2CO were synthesized and their crystal structures were determined. Li[C(CN)3]·½ (H3C)2CO crystallizes in the orthorhombic space group Ima2 (no. 46) with the cell parameters a=794.97(14), b=1165.1(2) and c=1485.4(3) pm, while LiK[C(CN)3]2 adopts the monoclinic space group P21/c (no. 14) with the cell parameters a=1265.7(2), b=1068.0(2) and c=778.36(12) pm and the angle β=95.775(7)°. Single crystals of K[C(CN)3] were also acquired, and the crystal structure was refined more precisely than before corroborating earlier results.

Geordnete Metallverteilung in KBaVO4 und KSrVO4 mit β-K2SO4-Struktur / Ordered Metal Distribution in KBaVO4and KSrVO4 Showing β -K2SO4 Structure

1996 ◽  
Vol 51 (4) ◽  
pp. 477-480 ◽  
Author(s):  
O. Schrandt ◽  
Hk. Müller-Buschbaum
Keyword(s):  
Single Crystals ◽  
Lattice Energy ◽  
Metal Distribution ◽  
Orthorhombic Symmetry ◽  
Space Group ◽  
Group D ◽  
Symmetry Space ◽  
Symmetry Space Group

Abstract Single crystals of KBaVO4(I) and KSrVO4(II) have been prepared by crystallization from V2O5 flux. The yellowish crystals show orthorhombic symmetry, space group D162h-Pnma with (I): a = 7.774(2), b = 5.899(1), c = 10.375(2) Å , (II): a = 7.400(2), b = 5.812(1), c -9.961(1), Z = 4. Both compounds show an ordered distribution of K+ and Ba2+ and Sr2+ respectively. The different sizes of the KO10 and BaO9 (SrO9) polyhedra are discussed with respect to those of the β-K2SO4 structure, considering the calculations of the Coulomb terms of lattice energy.

Benzo-18-krone-6 -Acetonitril (1/2): Kristallisation und Tieftemperatur- Röntgenstrukturanalyse / Benzo-18 -crown-6 -Acetonitrile (1/2): Crystallization and Low-Temperature X-Ray Analysis

1998 ◽  
Vol 53 (12) ◽  
pp. 1528-1530 ◽  
Author(s):  
Karna Wijaya ◽  
Oliver Moers ◽  
Armand Blaschette ◽  
Peter G. Jones
Keyword(s):  
Crystal Structure ◽  
Low Temperature ◽  
Data Collection ◽  
Single Crystals ◽  
Title Complex ◽  
Monoclinic Space Group ◽  
Hydrogen Atoms ◽  
Space Group ◽  
X Ray ◽  
Mecn Solution

Abstract Benzo-18 -crown-6 -Acetonitrile (1/2), Crystal Structure Single crystals of the title complex resulted fortuitously during an attempt to co-crystallise MeN(SO2Me)2 with benzo-18-crown-6 from an MeCN solution at -30 °C. The crystal structure has been determined via data collection at -100 °C (monoclinic, space group P21/n, Z = 4). The nitrile molecules are located with their me­ thyl groups above and below the plane of the 18-membered crown ring, the Me hydrogen atoms being rotationally disordered about the MeCN axes; C(methyl)···O(crown) distances range from 309.4(3) to 384.9(3) pm.

The preparation and X-ray crystal structure of Te(N3)3SbF6 containing the triazidotellurium(IV) cation, Te(N3)3+

1989 ◽  
Vol 67 (11) ◽  
pp. 1687-1692 ◽  
Author(s):  
James P. Johnson ◽  
Gregory K. MacLean ◽  
Jack Passmore ◽  
Peter S. White
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
Monoclinic Space Group ◽  
Space Group ◽  
X Ray ◽  
Bond Angles ◽  
X Ray Crystallography ◽  
Distorted Octahedral ◽  
Average Bond

The crystal structure of Te(N3)3SbF6 containing the first binary tellurium–nitrogen cation, triazidotellurium(IV) (Te(N3)3+), has been determined by X-ray crystallography. Single crystals of Te(N3)3SbF6 are monoclinic, space group P21/c with a = 9.201(6), b = 8.445(4), c = 13.582(7) Å, β = 100.36(5)°, Z = 4, final R1 = 0.036 for 1286 observed reflections. The structure consists of discrete Te(N3)3+ cations and distorted octahedral SbF6− anions, with some cation–anion interactions. The average Te—Nα—Nβ—Nγ bond distances in Te(N3)3+ are Te—Nα, 1.994(7); Nα—Nβ, 1.237(11); and Nβ—Nγ, 1.116(12) Å. The average bond angles about the Te, Nα, and Nβ atoms are 94.1(3)°, 116.5(6)°, and 173.7(9)°. Structural correlations with other TeX3+ species have yielded an estimate of the electronegativity of the N3− group to be 3.1 ± 0.1. Keywords: tetratellurium (2+) cation, triazidotellurium(IV) cation, electronegativity, azide.

Kristallstrukturen der iodierten closo-Hexaborate trans-(Ph4P)2[B6H4I2], mer-(Ph4P)2[B6H3I3] · 2 CH2Cl2, trans-(Ph4P)2[B6H2I4] · 2 CH3CN und (CH2Py2)[B6HI5]/Crystal Structures of the Iodized closo-Hexaborates trans-(Ph4P)2[B6H4I2], mer-(Ph4P)2[B6H3I3] · 2 CH2Cl2, trans-(Ph4P )2[B6H2I4] · 2 CH3CN and (CH2Py2)[B6HI5]

1998 ◽  
Vol 53 (2) ◽  
pp. 206-210 ◽  
Author(s):  
D. Sonnak ◽  
W. Preetz
Keyword(s):  
Single Crystals ◽  
Crystal Structures ◽  
Monoclinic Space Group ◽  
Orthorhombic Space Group ◽  
Triclinic Space Group ◽  
Space Group ◽  
X Ray ◽  
Structure Determinations

Abstract X-ray structure determinations have been performed on single crystals of trans-(Ph4P)2-[B6H4I2] (1) (triclinic, space group P1̄, a = 9.9680(12), b = 10.9690(11), c = 11.0470(14) Å,α = 88.167(9), β = 80.466(12), γ = 68.839(11)°, Z = 1), mer-(Ph4P)2[B6H3I3] · 2 CH2Cl2 (2)(triclinic, space group P1̄, a = 11.8694(11), b = 15.1699(13), c = 17.051(2) Å, α = 75.118(9), β = 71.953(10), γ = 69.331(8)°, Z = 2), trans-(Ph4P )2[B6H2I4] · 2 CH3CN (3) (monoclinic, space group P21/n, a = 14.9665(10), b = 7.6783(10), c = 23.385(3) Å, β = 95.78(9)°, Z = 2), and (CH2Py2)[B6HI5] (4) (orthorhombic, space group Pnma, a = 13.660(2), b = 11.8711(13), c = 13.839(2) Å, Z = 4). The B6 octahedra are compressed in the direction of the B-I bonds, resulting in shortened diagonal B ··· B distances with average values of the groups I-B ··· B-I = 2.37 and I-B ··· B-H = 2.43 Å as compared with H-B ··· B-H = 2.49 Å.

Zur Synthese und Kristallstruktur von manganhaltigen Boratoxiden: MnFe(BO3)O und MnAl0,5Yo,5(BO3)O / Synthesis and Crystal Structure of Manganese Borate Oxides: MnFe(BO3)O and MnAl0,5Yo,5(BO3)O

1995 ◽  
Vol 50 (8) ◽  
pp. 1146-1150 ◽  
Author(s):  
Anne Utzolino ◽  
Karsten Bluhm
Keyword(s):  
Crystal Structure ◽  
Metal Ions ◽  
Single Crystals ◽  
Orthorhombic Symmetry ◽  
Monoclinic Symmetry ◽  
Synthesis And Crystal Structure ◽  
Space Group ◽  
Group D ◽  
Symmetry Space ◽  
Symmetry Space Group

Single crystals of the compounds MnFe(BO3)O (I) and MnAl0.5Y0.5(BO3)O (II), were obtained by a B2O3 flux technique. I crystallizes with orthorhombic symmetry, space group D162h -Pnma (Nr.62), a = 939.92; b = 319.41; c = 939.11 pm; Z = 4 and II with monoclinic symmetry, space group C52h-P21/n (Nr. 14). a = 325.6; b = 955.1; c = 929.2 pm; β = 90.70° ; Z = 4. I is isotypic to the mineral Warwickite, while II is a distorded variant of this structure. All metal ions are octahedrally coordinated. Both structures contain isolated, trigonal planar BO3 units and oxygen atoms that are not coordinated to boron.

Activation of P4 by Li[SitBu3]: generation of lithium bis(supersilyl)heptaphosphanortricyclanide Li[P7(SitBu3)2]

2016 ◽  
Vol 71 (2) ◽  
pp. 135-139 ◽  
Author(s):  
Inge Sänger ◽  
Jens Breunig ◽  
Frauke Schödel ◽  
Michael Bolte ◽  
Hans-Wolfram Lerner
Keyword(s):  
Ambient Temperature ◽  
Single Crystals ◽  
Benzene Solution ◽  
Benzene Molecule ◽  
Cluster Compound ◽  
Monoclinic Space Group ◽  
Orthorhombic Space Group ◽  
Space Group ◽  
Degradation Reaction

AbstractTreatment of P4 with one equivalent of Li[SitBu3] leads to the formation of a number of oligo-phosphanes and -phosphides, e.g. the bicyclo[1.1.0]tetraphosphane P4(SitBu3)2, the heptaphosphanortricyclane P7(SitBu3)3, the tetraphosphides Li3[P(PSitBu3)3] (Li3[2a]), and the pentaphosphacyclopentadienide Li[P5]. From this reaction we could isolate single crystals of Li3[2a]. However, this reaction took another course in the presence of Li[OSitBu3]. When P4 was treated with one equivalent of Li[SitBu3] in the presence of Li[OSitBu3], the heptaphosphanortricyclanide Li[P7(SitBu3)2] (Li[8a]) was formed. Single crystals of the cluster {Li4(C6H6)(OSitBu3)[8a]3}·C6H6 (orthorhombic, space group Pca21) were isolated from the reaction mixture at ambient temperature. This cluster compound consists of three chiral Li[P7(SitBu3)2] units, one silanolate Li[OSitBu3], and one benzene molecule. We further investigated the degradation reaction of the bicyclo[1.1.0]tetraphosphane P4(SitBu3)2. After heating a benzene solution to 60 °C for 24 h, we found 100 % conversion of P4(SitBu3)2, and P7(SitBu3)3 (monoclinic, space group P21/c) and tBu3SiPH2 were formed.

Caesium Tetrachlorido Aurate(III), CsAuCl4

2011 ◽  
Vol 66 (8) ◽  
pp. 871-872
Author(s):  
Florian Kraus
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
Monoclinic Space Group ◽  
Space Group ◽  
Square Planar

The crystal structure of caesium tetrachlorido aurate(III), CsAuCl4, is presented. The compound crystallizes in the form of orange, needle-shaped single crystals in the monoclinic space group C2/c with a = 12.923(2), b = 6.1715(9), c = 96512(13) Å , β = 105.049(13)°, V = 743.34(19) Å3, and Z = 4. As expected, the compound consists of isolated Cs+ cations and square planar AuCl4- anions

Zur Kenntnis der Tief-und Hochtemperaturform eines Oxidarsenats des Zinks: ZnOZn3(AsO4)2

1996 ◽  
Vol 51 (2) ◽  
pp. 233-239 ◽  
Author(s):  
D. Frerichs ◽  
C.H. Park ◽  
Hk. Müller-Buschbaum
Keyword(s):  
Single Crystals ◽  
Crystal Structures ◽  
Lattice Parameters ◽  
Monoclinic Space Group ◽  
Space Group ◽  
Temperature Form ◽  
Laser Techniques ◽  
Similarities And Differences

Abstract Single crystals of the low (t-) and high (h-) temperature form of ZnOZn3(AsO4)2 have been prepared by flux and by CO2-LASER techniques respectively. Both compounds crystal­lizes monoclinic, space group C52h-P21/n with the lattice parameters t-ZnOZn3(AsO4)2: a = 9.807(3), b = 8.180(2), c = 9.967(2) Å , β = 116.53(2)°, Z = 4 and h -ZnOZn3(AsO4)2: a = 9.743(3), b = 8.163(8), c = 17.933(2) Å , β = 91.55(2)°, Z = 8. Similarities and differences of the crystal structures will be discussed.

Preparation and Crystal Structure Determination of [(C2Η5)4N]2Hg3Cl8

1995 ◽  
Vol 50 (1) ◽  
pp. 66-70 ◽  
Author(s):  
Inge Pabst ◽  
Peter Sondergeld ◽  
Mirjam Czjzek ◽  
Hartmut Fuess
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
Structure Analysis ◽  
Structure Determination ◽  
Title Compound ◽  
Monoclinic Space Group ◽  
Space Group ◽  
Coordination Type ◽  
X Ray

The title compound has been prepared in two different ways: First, by boiling single crystals of [(C2H5)4N]HgCl3 in a mixture of n-hexane/n-octane [4:1] at T = 350 K, and second, in a synthesis from stoichiometric quantities of the components. X-ray structure analysis gave the stoichiometry [(C2H5)4N]2Hg3Cl8, monoclinic, space group P21, a = 7.538(3), b = 19.909(6), c = 10.274(3) Å, β = 95.13(1)°, V = 1535.7(9) A3, Z = 2. The basic [Hg3Cl8]2--units form broken zig-zag chains along [100]. The Hg–Cl distances within the [Hg3Cl8]2- clusters range from 2.315(3) to 2.755(4) Å. This is a new coordination type for halomercurates.

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