Synthesis, crystal structure, and thermal studies of (NH sub 4 ) sub 2 Cd sub 2 (SeO sub 4 ) sub 3. 3H sub 2 O

Journal Article · Thu Nov 01 04:00:00 EST 1990 · Journal of Solid State Chemistry; (USA)

OSTI ID:6110237

Martinez, M L; Rodriguez, A; Mestres, L ^[1]; Solans, X ^[2]; Bocanegra, E H ^[3]

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1. Universidade de Barcelona (Spain)
2. Universidad de Barcelona (Spain)
3. Universidad del Pais Vasco, Bilbao (Spain)

The species (NH{sub 4}){sub 2}Cd{sub 2}(SeO{sub 4}){sub 3}.3H{sub 2}O has been synthesized and its crystal structure has been determined. Crystals were obtained by slow evaporation from an aqueous solution at 85-90{degree}C. The compound is monoclinic, P2{sub 1}/m, a = 6.836(2), b = 19.372(4), c = 5.690(2) {angstrom}, {beta} = 94,02(2){degree}, V = 751.7(6) {angstrom}{sup 3}, D{sub x} = 3.285 g cm{sup {minus}3}, Z = 2; F(000) = 692.0, {lambda}(MoK{alpha}) = 0.71069 {angstrom}, {mu}(MoK{alpha}) = 106.99 cm{sup {minus}1}, 298 K. Refinement was terminated at R = 0.043 for all observed reflections. Two kinds of tetrahedrally coordinated selenium atoms occur in the structure which form double chains which in turn give the three-dimensional structure. Thermogravimetry shows that the anhydrous species of langbeinite stoichiometry is not stable.

• OSTI ID: 6110237
• Journal Information: Journal of Solid State Chemistry; (USA), Journal Name: Journal of Solid State Chemistry; (USA) Vol. 89:1; ISSN 0022-4596; ISSN JSSCB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
360602 -- Other Materials-- Structure & Phase Studies
AMMONIUM COMPOUNDS
AQUEOUS SOLUTIONS
CADMIUM COMPOUNDS
CHEMICAL ANALYSIS
CHEMICAL PREPARATION
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DATA
DISPERSIONS
EXPERIMENTAL DATA
GRAVIMETRIC ANALYSIS
INFORMATION
INFRARED SPECTRA
MEASURING METHODS
MIXTURES
MONOCLINIC LATTICES
NUMERICAL DATA
OXYGEN COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
SELENATES
SELENIUM COMPOUNDS
SOLUTIONS
SPECTRA
SYNTHESIS
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS