Published 1983 | Version v1
Journal article Metadata-only

Crystal structure of upalite Al[(UO2)3O(OH)(PO4)2].7H2O. An example of mimetic twin

Creators

  • 1. Universite de Louvain, Louvain-la-Neuve (Belgium)

Description

The crystal structure of natural upalite from Kobokobo (Zaire) is determined: monoclinic system, space group P21/a; a = 13.704(4), b = 16.82(1), c = 9.332(2) A, β = 111.5(1)0, V = 2,001 A3, Z = 4. Crystals are always twinned and present the perfect appearance of orthorhombic symmetry. Structure type: phosphuranylite. Layers are connected by two octahedral centrosymmetrical AlO2(H2O)4 and Al(H2O)6 groups and by 2 H2O

Abstract (French)

La structure cristalline de l'upalite naturelle de Kobokobo (Zaire) a ete determinee. Systeme monoclinique, groupe spatial P21/a; a = 13,704(4), b = 16,82(1), c = 9,332(2) A, β = 111,5(1)0, V = 2001 A3, Z = 4. Les cristaux sont invariablement macles et simulent parfaitement la symetrie orthorhombique. Type structural: phosphuranylite. Les feuillets sont relies entre eux par deux groupes octaedriques centrosymetriques AlO2(H2O)4 et Al(H2O)6 et par deux molecules d'eau

Additional details

Additional titles

Original title (French)
Structure cristalline de l'upalite Al[(UO

Publishing Information

Journal Title
Bull. Mineral.
Journal Volume
106
Journal Issue
4
Series
Bull. Mineral.
Journal Page Range
383-389
ISSN
0180-9210

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
15024136
Subject category
S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY;
Resource subtype / Literary indicator
Numerical Data
Descriptors DEI
ALUMINIUM PHOSPHATES; CRYSTAL LATTICES; DENSITY; EXPERIMENTAL DATA; INTERATOMIC DISTANCES; SPACE GROUPS; TWINNING; URANIUM MINERALS; URANYL PHOSPHATES
Descriptors DEC
ACTINIDE COMPOUNDS; ALUMINIUM COMPOUNDS; CRYSTAL STRUCTURE; DATA; DISTANCE; INFORMATION; MATERIALS; MINERALS; NUMERICAL DATA; OXYGEN COMPOUNDS; PHOSPHATES; PHOSPHORUS COMPOUNDS; PHYSICAL PROPERTIES; RADIOACTIVE MATERIALS; RADIOACTIVE MINERALS; SYMMETRY GROUPS; URANIUM COMPOUNDS; URANYL COMPOUNDS