Chemical preparation and crystal data for two condensed phosphates NiCs4(PO3)6 and NiK4(P3O9)2

2004 ◽  
Vol 19 (4) ◽  
pp. 375-377 ◽  
Author(s):  
Kacem Sbai ◽  
Said Belaaouad ◽  
Abdelkebir Kenz ◽  
El Mostafa Tace ◽  
Malika Tridane
Keyword(s):  
Unit Cell ◽  
Crystallographic Data ◽  
Crystal Data ◽  
Chemical Preparation ◽  
Space Group ◽  
Cell Dimensions ◽  
Condensed Phosphates ◽  
Unit Cell Dimensions

Methods of chemical preparation and crystallographic data are reported for two new condensed phosphates: a polyphosphate of nickel and cesium, NiCs4(PO3)6, and a cyclotriphosphate of nickel and potassium, NiK4(P3O9)2. NiCs4(PO3)6 is rhombohedral with the following unit-cell dimensions: a=b=11.602(1) Å, c=9.078(1) Å, space group P−31c, V=1058.24(1) Å3, and Z=2. NiK4(P3O9)2 is triclinic with the following unit-cell dimensions: a=6.143(8) Å, b=6.80(1) Å, c=12.80(3) Å, α=102.8(3)°, β=89.7(2)°, γ=66.03(7)°, space group P−1, V=473.56(3) Å3, and Z=1.

Chemical preparation and crystal data for two new condensed phosphates

2002 ◽  
Vol 17 (1) ◽  
pp. 23-24 ◽  
Author(s):  
S. Belaaouad ◽  
K. Sbai
Keyword(s):  
Unit Cell ◽  
Crystallographic Data ◽  
Crystal Data ◽  
Chemical Preparation ◽  
Cell Dimensions ◽  
Condensed Phosphates ◽  
Unit Cell Dimensions

Methods of chemical preparation and crystallographic data are reported for two new condensed phosphates: a hydrated cyclotriphosphate with a formula MnNa4(P3O9)2 4H2O and its anhydrous form MnNa4(P3O9)2. MnNa4(P3O9)2 4H2O is monoclinic P21/a with the following unit-cell dimensions: a=8.536(2) Å, b=14.309(3) Å, c=8.508(2) Å, β=96.452(2)°, and Z=2. MnNa4(P3O9)2 is monoclinic C2/c with the following unit-cell dimensions: a=13.198(2) Å, b=8.241(1) Å, c=14.228(2) Å, β=95.045(1)°, and Z=4.

Chemical preparation and crystal data for two hydrated cyclotriphosphates SrMIP3O9⋅3H2O and their corresponding anhydrous SrMIP3O9 (MI=K+ and Tl+)

2003 ◽  
Vol 18 (3) ◽  
pp. 233-235 ◽  
Author(s):  
Kacem Sbai ◽  
Khadija El Kababi ◽  
Saïd Belaaouad
Keyword(s):  
General Formula ◽  
Unit Cell ◽  
Monoclinic Space Group ◽  
Crystal Data ◽  
Chemical Preparation ◽  
Space Group ◽  
Cell Dimensions ◽  
Condensed Phosphates ◽  
Unit Cell Dimensions

Methods of chemical preparation and crystal data are reported for four new condensed phosphates: two hydrated cyclotriphosphates with a general formula SrMIP3O9⋅3H2O (MI=K+,Tl+) and their corresponding anhydrous cyclotriphosphates SrMIP3O9 (MI=K+,Tl+). The two hydrated condensed phosphates, SrKP3O9⋅3H2O and SrTlP3O9⋅3H2O, belong to previously investigated structure types. SrKP3O9⋅3H2O and SrTlP3O9⋅3H2O are orthorhombic, Z=4, space group Pnma, with respectively the following unit-cell dimensions: a=9.082(2) Å, b=8.133(2) Å, c=15.009(2) Å, M(20)=49, F(25)=61(0.0052;79) and a=9.115(7) Å, b=8.139(7) Å, c=15.221(2) Å, M(20)=285, F(30)=522(0.000 411;140). SrKP3O9 and SrTlP3O9 are monoclinic, space group P21/m or P21, Z=4, with, respectively, the following unit-cell dimensions: a=14.957(1) Å, b=8.372(1) Å, c=7.909(1) Å, β=102.27(1)°, M(20)=81, F(24)=95(0.000 025;92) and a=14.544(2) Å, b=8.639(1) Å, c=7.727(1) Å, β=102.05(1)°, M(20)=66, F(30)=78(0.003 098;125).

Chemical preparation and crystal data for two new cyclotriphosphates MIIK4(P3O9)2 (MII=Co2+ and Mn2+)

2003 ◽  
Vol 18 (3) ◽  
pp. 224-226 ◽  
Author(s):  
Kacem Sbai ◽  
Malika Tridane ◽  
Ali Abouimrane ◽  
Saïd Belaaouad ◽  
Abdelouahed Cherqaoui
Keyword(s):  
Unit Cell ◽  
Crystal Data ◽  
Chemical Preparation ◽  
Triclinic Space Group ◽  
Space Group ◽  
Cell Dimensions ◽  
Unit Cell Dimensions

Methods of chemical preparation and crystal data are reported for two new anhydrous cyclotriphosphates MIIK4(P3O9)2 (MII=Co2+ and Mn2+). These anhydrous cyclotriphosphates CoK4(P3O9)2 and MnK4(P3O9)2 were obtained by total dehydration of corresponding hydrated cyclotriphosphates CoK4(P3O9)2.7H2O and MnK4(P3O9)2.2H2O. CoK4(P3O9)2 is triclinic, space group P−1, Z=1 with the following unit-cell dimensions: a=6.29(3) Å, b=8.00(1)Å, c=13.05(8)Å, α=86.03(5)°, β=98.00(1)°, γ=68.11(2)°. MnK4(P3O9)2 crystallizes in the rhombohedral system, space group P−31c, Z=2 with the following unit-cell dimensions: a=b=7.337(3)Å, c=19.920(1)Å.

Crystal data and X-ray powder diffraction data of 2,4-diiodo-4-nitrophenol (disophenol), C6H3I2NO3. More precise X-ray powder diffraction data of p-nitrophenol, C6H5NO3

1996 ◽  
Vol 11 (4) ◽  
pp. 301-304
Author(s):  
Héctor Novoa de Armas ◽  
Rolando González Hernández ◽  
José Antonio Henao Martínez ◽  
Ramón Poméz Hernández
Keyword(s):  
Powder Diffraction ◽  
Diffraction Data ◽  
Unit Cell ◽  
Crystal Data ◽  
Powder Diffraction Data ◽  
Space Group ◽  
X Ray ◽  
Cell Dimensions ◽  
Unit Cell Dimensions ◽  
Monoclinic Cell

p-nitrophenol, C6H5NO3, and disophenol, C6H3I2NO3, have been investigated by means of X-ray powder diffraction. The unit cell dimensions were determined from diffractometer methods, using monochromatic CuKα1 radiation, and evaluated by indexing programs. The monoclinic cell found for p-nitrophenol was a=6.159(2) Å, b=8.890(2) Å, c=11.770(2) Å, β=103.04(2)°, Z=4, space group P21 or P2l/m, Dx=1.469 Mg/m3. The monoclinic cell found for disophenol has the dimensions a=8.886(1) Å, b=14.088(2) Å, c=8.521(1) Å, β=91.11(1)°, Z=4, space group P2, P2, Pm or P2/m, Dx=2.438 Mg/m3.

Notizen: Refinement of the Crystal Structures of CuTe2Br and CuTe2I

1989 ◽  
Vol 44 (8) ◽  
pp. 990-992 ◽  
Author(s):  
Wolfgang Milius
Keyword(s):  
Single Crystal ◽  
Crystal Structures ◽  
Unit Cell ◽  
Lattice Parameters ◽  
Crystal Data ◽  
Space Group ◽  
Cell Dimensions ◽  
Unit Cell Dimensions

The crystal structures of CuTe2Br and CuTe2I have been refined on the basis of single crystal data. Both compounds crystallize monoclinically in space group P21/c. The structures are isotypic with that of CuTe2Cl. The lattice parameters of CuTe2Br are a = 834.5(8) pm, b = 492.8(4) pm, c = 1573.3(5) pm and β = 135.3(2)°. The unit cell dimensions of CuTe2I are a = 866.5(8) pm, b = 491.4(4) pm, c = 1649.6(3) pm and β = 135.1(2)°.

Chemical preparation and XRD data for a new triphosphate CuNa3P3O10 and two cyclotriphosphates SrRbP3O9·3H2O and SrRbP3O9

2011 ◽  
Vol 26 (1) ◽  
pp. 78-81 ◽  
Author(s):  
I. Fahim ◽  
A. Kheïreddine ◽  
M. Tridane ◽  
S. Belaaouad
Keyword(s):  
Ion Exchange ◽  
Exchange Resin ◽  
Ion Exchange Resin ◽  
Unit Cell ◽  
Chemical Preparation ◽  
Hexagonal System ◽  
Space Group ◽  
Cell Dimensions ◽  
Unit Cell Dimensions

Methods of chemical preparation and XRD data are reported for a new triphosphate CuNa3P3O10 and two cyclotriphosphates SrRbP3O9·3H2O and SrRbP3O9. SrRbP3O9·3H2O was prepared by the method of ion-exchange resin, while CuNa3P3O10 and SrRbP3O9 were obtained by total dehydration of CuNa3P3O10·12H2O and SrRbP3O9·3H2O, respectively. CuNa3P3O10 crystallizes in the hexagonal system, with space group P-31c, Z=2, and the following unit-cell dimensions: a=b=7.022(1) Å, c=9.217(1) Å, M(20)=81, F(20)=117(0.003 419, 50), and V=393.24(2) Å3. SrRbP3O9·3H2O is orthorhombic, with Z=4, space group Pnma, and the following unit-cell dimensions: a=9.120(1) Å, b=8.141(1) Å, c=15.234(1) Å, M(20)=5.1, F(20)=5.8(0.0173,199), and V=1131.1(3) Å3. SrRbP3O9 is monoclinic, with space group P21/m or P21, Z=4, and the following unit-cell dimensions: a=14.958(3) Å, b=8.503(2) Å, c=7.898(2) Å, β=122.19(2)°, M(20)=9.9, F(20)=16.5(0.0189, 64), and V=850.2(8) Å3.

Improved Crystallographic Data for AlNbO4

1991 ◽  
Vol 6 (1) ◽  
pp. 48-49 ◽  
Author(s):  
C. J. Rawn ◽  
R. S. Roth ◽  
H. F. McMurdie
Keyword(s):  
Single Crystal ◽  
Least Squares ◽  
Powder Diffraction ◽  
Unit Cell ◽  
Crystallographic Data ◽  
Space Group ◽  
X Ray ◽  
Cell Dimensions ◽  
Unit Cell Dimensions ◽  
Monoclinic Cell

AbstractThe compound AlNbO4 has been studied by single crystal X-ray precession photographs and X-ray powder diffraction. Unit cell dimensions were calculated using a least squares analysis that refined to a Δ2θ° of no more than 0.03°. A monoclinic cell was found with space group C2/m, a = 12.1558(5)Å, b = 3.7345(2)Å, c = 6.4886(3)Å, and β = 107.613(4)°.

Unit-cell Dimensions and Space Group of 6-Mercaptopurine Monohydrate

Nature ◽  
1956 ◽  
Vol 178 (4529) ◽  
pp. 379-379 ◽  
Author(s):  
K. HOOGSTEEN
Keyword(s):  
Unit Cell ◽  
Space Group ◽  
Cell Dimensions ◽  
Unit Cell Dimensions

Clathrathydrate von Tetramethylammoniumhydroxid: Neue Phasen und Kristallstrukturen [1] / Clathrate Hydrates of Tetramethylammonium Hydroxide: New Phases and Crystal Structures [1]

1992 ◽  
Vol 47 (2) ◽  
pp. 263-274 ◽  
Author(s):  
Dietrich Mootz ◽  
Dieter Stäben
Keyword(s):  
Unit Cell ◽  
Tetramethylammonium Hydroxide ◽  
Clathrate Hydrates ◽  
Space Group ◽  
Β Phase ◽  
Metastable Structure ◽  
Cell Dimensions ◽  
Structure Determinations ◽  
Butyl Amine ◽  
Unit Cell Dimensions

The melting diagram of the system tetramethylammonium hydroxide-water has been reinvestigated in the region of 66.67 - 100 mol% H2O , using DTA , DSC and temperature-dependent X-ray powder diffraction. This was done as correction and supplementation of a previous study in the same laboratory (D. Mootz, R. Seidel, J. Incl. Phenom. 8 , 139 (1990)). The system is now considered to contain as many as eight stable hydrates, three of them dimorphic with a low-temperature α and a high-temperature β form. The compositions are Me4NOH · χH2O with χ = 2 (α and β), 4, 4.6 (α and β), 5 (α and β), 6.67, 7.5, 8.75 and 10. A second 7.5-hydrate, called 7 .5 α in the previous study, is now regarded as metastable. - Structure determinations have been performed for the new phases with x = 4.6 (α), 6.67 and 8.75. The 4.6 α-hydrate, transforming to 4.6 β at 32 °C, is cubic with space group Pa3̄ and Z = 40 formula units per unit cell. The lattice constant is a = 21.493 Å at -160 °C. The 6.67-hydrate, melting with decomposition at 13 °C, is monoclinic with space group P21/m and Z = 6 . It was studied as the O-deuterated isotype with unit-cell dimensions a = 11.874, b = 20.019, c = 8.272 Å and β = 103.84° at 3 °C. The 8.75-hydrate, melting with decomposition at - 3 °C, is cubic with space group 14̄3 d, Z = 16 and a = 18.38(2) Å at - 20 °C. The three structures, as most others of the higher hydrates of the system studied previously, are those of polyhedral clathrate hydrates. For the hydrates 4 .6 α and 6.67 deviations of the anionic, i.e. proton-deficient, new water structures from being fully four-connected are described in detail. The 8.75-hydrate is isostructural with the hitherto unparalleled 9.75-hydrate of t-butyl amine. - The phase identity and structure of the 4.6 β-hydrate were recognized as those attributed to an erroneously assumed 5 β-phase in the previous study. 5 β now denotes the room-temperature form of the pentahydrate, previously called 5 α. The present 5 α is another of the new phases and the only one of the system with its structure still undetermined.

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