Published August 1, 1988 | Version v1
Journal article Metadata-only

Rietveld profile analysis of calcined AlPO4-11 using pulsed neutron powder diffraction

Creators

  • 1. Chicago Univ., IL (USA). Materials Research Lab.
  • 2. Chicago Univ., IL (USA). Dept. of Geophysical Sciences

Description

Aluminium phosphate, AlPO4, Mr=121.95, orthorhombic, Icmm (disordered Al, P), Icm2 (ordered Al, P), a=13.5333(8), b=18.4845(10), c=8.3703(4) A, V=2094 A3, Z=20, Dx=1.93 g cm-3, T ≅ 295 K, Rwp=0.031, RF2=0.109 (Icmm) and Rwp=0.027, RF2=0.058 (Icm2) for 1017 independent reflections. Sample calcined at 873 K and dehydrated at 573 K. Time-of-flight neutron powder diffraction data were taken on the GPPD diffractometer at the Argonne National Laboratory Intense Pulsed Neutron Source. The structure was refined by Rietveld profile analysis in the range d=0.86-3.91 A in two space groups: Icmm assuming no ordering of Al and P, and Icm2 assuming strict alternation of Al and P on tetrahedral nodes. (orig./BHo)

Additional details

Publishing Information

Journal Title
Acta Crystallogr., Sect. B: Struct. Sci.
Journal Volume
44
Journal Issue
4
Series
Acta Crystallogr., Sect. B: Struct. Sci.
Journal Page Range
367-373
ISSN
0108-7681
CODEN
ASBSD

INIS

Country of Publication
Denmark
Country of Input or Organization
Denmark
INIS RN
19102114
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Resource subtype / Literary indicator
Numerical Data
Descriptors DEI
ALUMINIUM PHOSPHATES; BOND ANGLE; CALCINATION; CRYSTAL STRUCTURE; DEHYDRATION; EXPERIMENTAL DATA; HIGH TEMPERATURE; INTERATOMIC DISTANCES; LATTICE PARAMETERS; MEDIUM TEMPERATURE; NEUTRON DIFFRACTION; ORTHORHOMBIC LATTICES; POWDERS; SPACE GROUPS; TEMPERATURE DEPENDENCE
Descriptors DEC
ALUMINIUM COMPOUNDS; CHEMICAL REACTIONS; COHERENT SCATTERING; CRYSTAL LATTICES; DATA; DECOMPOSITION; DIFFRACTION; DISTANCE; INFORMATION; NUMERICAL DATA; OXYGEN COMPOUNDS; PHOSPHATES; PHOSPHORUS COMPOUNDS; PYROLYSIS; SCATTERING; SYMMETRY GROUPS

Optional Information

Contract/Grant/Project number
Contract W-31-109-ENG-38; Grant CHE-84-05167; DMR-82-16892