Published November 1997 | Version v1
Journal article Metadata-only

New silicon band in haiweete structure

Creators

  • 1. University of Sao Paulo, (Brazil)
  • 2. Geology Faculty, Moscow State University, Moscow, 119899 (Russian Federation)
  • 3. Baikov Institute of Metallurgy, Russian Academy of Sciences, Leninskii pr. 49, Moscow, 117334 (Russian Federation)
  • 4. Shubnikov Institute of Crystallography, Russian Academy of Sciences, Leninskii pr. 59, Moscow, 117333 (Russian Federation)

Description

The structure of the mineral haiweete from Brazil has been determined [automatic Enraf-Nonius diffractometer, R=11.8%, 1260 reflections with I>3σ(I)]. The experimental data were obtained from a block single crystal with the misorientation of blocks up to 10 deg. The parameters of the orthorhombic unit cell are: a=14.263(3), b=17.988(3), c=18.395(3) A, V=4719.5 A3, sp. gr. P212121, Z=8. The refined chemical formula of the mineral is Ca(UO2)2[Si5O12(OH)2]·4.5H2O. The specific features of the mineral structure distinguishing it from other members of this group were established, including the formation of an original silicate band

Additional details

Identifiers

URL
https://www.pleiades.online/contents/cryst/cryst6_97v42cont.htm;

Publishing Information

Journal Title
Crystallography Reports
Journal Volume
42
Journal Issue
6
Journal Page Range
p. 927-933
ISSN
1063-7745
CODEN
CYSTE3

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
35075893
Subject category
S36: MATERIALS SCIENCE; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Resource subtype / Literary indicator
Translation
Descriptors DEI
BRAZIL; CALCIUM COMPOUNDS; CRYSTALLOGRAPHY; LATTICE PARAMETERS; MINERALS; MONOCRYSTALS; ORTHORHOMBIC LATTICES; REFLECTION; REFRACTIVE INDEX; SILICATES; SILICON; SPACE GROUPS; SYMMETRY; SYNTHESIS; URANYL COMPOUNDS; X-RAY DIFFRACTION
Descriptors DEC
ACTINIDE COMPOUNDS; ALKALINE EARTH METAL COMPOUNDS; COHERENT SCATTERING; CRYSTAL LATTICES; CRYSTAL STRUCTURE; CRYSTALS; DEVELOPING COUNTRIES; DIFFRACTION; ELEMENTS; LATIN AMERICA; OPTICAL PROPERTIES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; SCATTERING; SEMIMETALS; SILICON COMPOUNDS; SOUTH AMERICA; SYMMETRY GROUPS; URANIUM COMPOUNDS

Optional Information

Notes
Translated from Kristallografiya, ISSN 0023-4761, 42, 1003-1009 (November-December 1997); (c) 1997 MAIK/Interperiodika