The crystal structure of AlAsO4 at high pressure

1991 ◽  
Vol 194 (3-4) ◽  
Author(s):  
H. Sowa
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Low Temperature ◽  
Single Crystal ◽  
Single Crystal Structure ◽  
Space Groups ◽  
Structure Determinations ◽  
Oxygen Anions

AbstractSingle-crystal structure determinations of the low-temperature quartz modification of AlAsOThe refinements were carried out in space groupsThe high pressure behaviour of AlAsOFrom the shortening of intertetrahedral O – O distances and the changes of the shape of the Dirichlet domains of the oxygen anions, it can be concluded that the oxygen packing changes with increasing pressure in the direction of an arrangement corresponding to a cubic body-centered lattice. As in the case of SiO

High‐pressure single‐crystal structure determinations for ruby up to 90 kbar using an automatic diffractometer

1978 ◽  
Vol 49 (8) ◽  
pp. 4411-4416 ◽  
Author(s):  
H. d’Amour ◽  
D. Schiferl ◽  
W. Denner ◽  
Heinz Schulz ◽  
W. B. Holzapfel
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Single Crystal ◽  
Single Crystal Structure ◽  
Structure Determinations ◽  
Automatic Diffractometer

scholarly journals Single-crystal structure ofHoBaCo4O7at ambient conditions, at low temperature, and at high pressure

2009 ◽  
Vol 79 (6) ◽  
Author(s):  
Erick A. Juarez-Arellano ◽  
Alexandra Friedrich ◽  
Dan J. Wilson ◽  
Leonore Wiehl ◽  
Wolfgang Morgenroth ◽  
...  
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Low Temperature ◽  
Single Crystal ◽  
Single Crystal Structure ◽  
Ambient Conditions

The trans-[py2AlCl4] - (‘py’ = pyridine) Anion, Structurally Characterized in Two Pyridinium Salts

2004 ◽  
Vol 57 (5) ◽  
pp. 503 ◽  
Author(s):  
Peter C. Junk ◽  
Colin L. Raston ◽  
Brian W. Skelton ◽  
Allan H. White
Keyword(s):  
Crystal Structure ◽  
Low Temperature ◽  
Single Crystal ◽  
Metal Atom ◽  
Single Crystal Structure ◽  
Pyridinium Salts ◽  
Structure Determinations

Salts of the trans-[py2AlCl4]– anion have been structurally characterized by ‘low’-temperature single crystal structure determinations of the adducts 2AlCl3 · 2HCl · 4py {=(pyH)2[(py)2AlCl4](AlCl4)}, and 2AlCl3 · 3HCl · 7py {=(pyH)3[(py)2AlCl4]2Cl}, extending the structurally characterized members of the array [(py)nAlCl(6–n)](n–3)± with ‘octahedral’ six-coordinate metal atom geometries, the members for n = 3 (mer) and 4 (trans) having been previously characterized.

The crystal structure of GaPO4 at high pressure

1994 ◽  
Vol 209 (12) ◽  
Author(s):  
H. Sowa
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Low Temperature ◽  
Single Crystal ◽  
Single Crystal Structure ◽  
Space Group ◽  
Pressure Behavior

AbstractSingle-crystal structure refinements of the low-temperature quartz modification of GaPOThe refinements were carried out in space groupThe high pressure behavior of GaPOAs in the case of other quartz-type structures, the high-pressure behavior of GaPO

Crystal and powder XRD data of Mg3(PO4)2-III: High-temperature and high-pressure form

1995 ◽  
Vol 10 (4) ◽  
pp. 293-295 ◽  
Author(s):  
F. Brunet ◽  
C. Chopin ◽  
A. Elfakir ◽  
M. Quarton
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
High Temperature ◽  
Single Crystal ◽  
Diffraction Pattern ◽  
Structure Refinement ◽  
Powder Xrd ◽  
Single Crystal Structure ◽  
Crystal Structure Refinement ◽  
Pressure Form

A new diffraction pattern of the high-temperature and high-pressure polymorph Mg3(PO4)2-III (PDF 43-500) is given and indexed on the basis of a single-crystal structure refinement. It allows diffractogram indexing of the isostructural high-temperature and high-pressure form of Co3(PO4)2 (PDF 43-499).

Lewis-Base Adducts of Main Group 1 Metal Compounds. X. Lithium Bromide and Iodide Complexes With Acetonitrile (1 : 2, 1 : 4 Respectively)

1989 ◽  
Vol 42 (1) ◽  
pp. 201 ◽  
Author(s):  
CL Raston ◽  
CR Whitaker ◽  
AH White
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Lithium Bromide ◽  
Main Group ◽  
Lewis Base ◽  
Single Crystal Structure ◽  
Metal Compounds ◽  
Structure Determinations ◽  
Group 1

Although only sparingly soluble in acetonitrile, lithium(1) bromide and iodide crystallize as acetonitrile adducts, structurally characterized as LiX/MeCN 1 : 2 and 1 : 4 respectively by single-crystal structure determinations. The bromide is a �,�′-dibromo-bridged dimer , ( MeCN )2LiBr2Li( NCMe )2)] (monoclinic, P21/n, a 7.624(2), b 12.61 2(2), c 8.047(3) � , β 98.94(3)°p; Z 2 dimers; R 0.038 for No 1081 'observed' reflections); Li-Br, N 2.534(7), 2.492(8); 2.031(9), 2.047(8) � respectively, with Li…Li, 3.17(1); Br…Br, 3.8989(9) � respectively. The iodide is ionic, [Li( NCMe )4]+1- (orthorhombic, P21221, a 20.66(1), b 12.208(6), c 8.4296) �, Z 6; R 0.062 for No 866).

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