Details
| Translated title of the contribution | Structure and properties of UO2(H2AsO4)2 · H2O |
|---|---|
| Original language | German |
| Pages (from-to) | 1414-1420 |
| Number of pages | 7 |
| Journal | Zeitschrift fur Anorganische und Allgemeine Chemie |
| Volume | 626 |
| Issue number | 6 |
| Publication status | Published - 16 May 2000 |
Abstract
UO2(H2AsO4)2 · H2O was synthesized by dissolving elemental uranium in arsenic acid (80.5%) for twelve weeks at room temperature. The resulting small crystals were transparent and of yellow-green color. The crystal structure was refined from single-crystal X-ray data: C2/c, a = 1316.4(3) pm, b = 886.2(2) pm, c = 905.0(3) pm, β= 124.41(3)°, R1 = 0.023, wR2 = 0.060, 981 structure factors, and 65 variable parameters. The uranium atoms of this new structure type are coordinated by two very close oxygen atoms in linear arrangement. Four further oxygen atoms which belong to four different AsO4 tetrahedra and the oxygen atom of the water molecule complete the 7-fold coordination of the uranium atoms. [UO2(H2O)]2+ and two H2AsO4- units form infinite electroneutral chains which are the main building units of the structure and which are interconnected by hydrogen bridging bonds. IR heating experiments show that dehydration around 500 K leads to a complete decomposition of the structure. Magnetic measurement gave a diamagnetic behavior with a susceptibility of χ = -8.68 10-9 m3/mol in good agreement with the diamagnetic increment of the compound (χ = -8.20 10-9 m3/mol) calculations with U6+.
ASJC Scopus subject areas
- Chemistry(all)
- Inorganic Chemistry
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In: Zeitschrift fur Anorganische und Allgemeine Chemie, Vol. 626, No. 6, 16.05.2000, p. 1414-1420.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Struktur und eigenschaften von UO2(H2AsO4)2 · H2O
AU - Gesing, Thorsten M.
AU - Rüscher, Claus H.
PY - 2000/5/16
Y1 - 2000/5/16
N2 - UO2(H2AsO4)2 · H2O was synthesized by dissolving elemental uranium in arsenic acid (80.5%) for twelve weeks at room temperature. The resulting small crystals were transparent and of yellow-green color. The crystal structure was refined from single-crystal X-ray data: C2/c, a = 1316.4(3) pm, b = 886.2(2) pm, c = 905.0(3) pm, β= 124.41(3)°, R1 = 0.023, wR2 = 0.060, 981 structure factors, and 65 variable parameters. The uranium atoms of this new structure type are coordinated by two very close oxygen atoms in linear arrangement. Four further oxygen atoms which belong to four different AsO4 tetrahedra and the oxygen atom of the water molecule complete the 7-fold coordination of the uranium atoms. [UO2(H2O)]2+ and two H2AsO4- units form infinite electroneutral chains which are the main building units of the structure and which are interconnected by hydrogen bridging bonds. IR heating experiments show that dehydration around 500 K leads to a complete decomposition of the structure. Magnetic measurement gave a diamagnetic behavior with a susceptibility of χ = -8.68 10-9 m3/mol in good agreement with the diamagnetic increment of the compound (χ = -8.20 10-9 m3/mol) calculations with U6+.
AB - UO2(H2AsO4)2 · H2O was synthesized by dissolving elemental uranium in arsenic acid (80.5%) for twelve weeks at room temperature. The resulting small crystals were transparent and of yellow-green color. The crystal structure was refined from single-crystal X-ray data: C2/c, a = 1316.4(3) pm, b = 886.2(2) pm, c = 905.0(3) pm, β= 124.41(3)°, R1 = 0.023, wR2 = 0.060, 981 structure factors, and 65 variable parameters. The uranium atoms of this new structure type are coordinated by two very close oxygen atoms in linear arrangement. Four further oxygen atoms which belong to four different AsO4 tetrahedra and the oxygen atom of the water molecule complete the 7-fold coordination of the uranium atoms. [UO2(H2O)]2+ and two H2AsO4- units form infinite electroneutral chains which are the main building units of the structure and which are interconnected by hydrogen bridging bonds. IR heating experiments show that dehydration around 500 K leads to a complete decomposition of the structure. Magnetic measurement gave a diamagnetic behavior with a susceptibility of χ = -8.68 10-9 m3/mol in good agreement with the diamagnetic increment of the compound (χ = -8.20 10-9 m3/mol) calculations with U6+.
KW - Crystal structure
KW - Diamagnetism
KW - Spectroscopy
KW - Thermogravimetry
KW - Uranyl arsenate hydrate
UR - http://www.scopus.com/inward/record.url?scp=0008264478&partnerID=8YFLogxK
U2 - 10.1002/(sici)1521-3749(200006)626:6<1414::aid-zaac1414>3.0.co;2-j
DO - 10.1002/(sici)1521-3749(200006)626:6<1414::aid-zaac1414>3.0.co;2-j
M3 - Artikel
AN - SCOPUS:0008264478
VL - 626
SP - 1414
EP - 1420
JO - Zeitschrift fur Anorganische und Allgemeine Chemie
JF - Zeitschrift fur Anorganische und Allgemeine Chemie
SN - 0044-2313
IS - 6
ER -