Detail of "1312-81-8"

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CAS Number:
1312-81-8
Name:
Lanthanum oxide
Molecular Structure:
Formula:
La₂O₃
Molecular Weight:
325.82
Deleted CAS:
162525-16-8
Synonyms:
Dilanthanumoxide;Dilanthanum trioxide;Lanthana;Lanthanum sesquioxide;Lanthanum trioxide;Lanthanum(3+) oxide;Lanthanum(III) oxide;
EINECS:
215-200-5
Density:
6.51 g/cm³
Melting Point:
2315°C (2590 K)
Boiling Point:
4200°C (4500 K)
Solubility:
insoluble in water
Appearance:
white powder
Hazard Symbols:
Xi
Risk Codes:
36/37/38
Safety:
26-36/39 Details

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Reference

Preparation and crystal structure of lanthanum molybdenum silicon oxide (La3MO4SiO14), an unusual cluster compound of molybdenum: Preparation and crystal structure of lanthanum molybdenum silicon oxide (La3MO4SiO14), an unusual cluster compound of molybdenum. Betteridge, P. W.; Cheetham, A. K.; Howard, J. A. K.; Jakubicki, G.; McCarroll, W. H. (Chem. Crystall. Lab., Oxford Univ., Oxford OXI 3PD, UK). Inorg. Chem., 23(6), 737-40 (English) 1984. CODEN: INOCAJ. ISSN: 0020-1669. DOCUMENT TYPE: Journal CA Section: 72 (Electrochemistry) Section cross-reference(s): 75, 78 Black needles of La3Mo4SiO14 (av. Mo oxidn. state: 3.75) were prepd. by electrolytic redn. at 1100° of melt contg. Na2MoO4, MoO3, and La2O3. The Si was abstracted from the porcelain crucible. The comp. crystallizes in orthorhombic space group Pnma with a 17.684(4), b 5.643(1), c 11. 1312-81-8 and 7439-98-7 are also in the experiment.037(2) ?, and Z = 4. The structure was refined by using blocked-cascade full-matrix least-squares methods to R = 4.2% and RW = 4.5% using 1755 reflections. The structure contains triangular Mo3O13 units with Mo-Mo distances of 2.550(1) and 2.562(1) ? and edge-sharing MoO6 octahedra with Mo-Mo distances alternately 2.551(1) and 3.13(1) ? along the chain direction. The Si is tetrahedrally coordinated (mean Si-O distance: 1.64 (?), and the 3 crystalog. distinct La atoms have coordination nos. of 8, 9, and 10, the stereochem. in each case being based upon trigonal-prismatic coordination. .

Phase equilibria in the system lanthanum oxide-phosphorus oxide (La2O3-P2O5): Phase equilibria in the system lanthanum oxide-phosphorus oxide (La2O3-P2O5). Park, Hee Dong; Kreidler, Eric R. (Dep. Ceram. Eng., Ohio State Univ., Columbus, OH 43210, USA). J. Am. Ceram. Soc., 67(1), 23-6 (English) 1984. CODEN: JACTAW. ISSN: 0002-7820. DOCUMENT TYPE: Journal CA Section: 57 (Ceramics) Subsolidus phase equil. in the system La2O3-P2O5 were established. The system contains 6 intermediate compds. having La2O3:P2O5 molar ratios of 3:1, 7:3, 1:1, 1:2, 1:3, and 1:5.Several substances with their cas registry numbers 1312-81-8 and 13778-59-1 may be metioned in this study. The 3:1 compd. has a phase transformation at 935°. The 1:2 compd. decomps. to a mixt. of 1:1 and 1:3 at 755°. The 1:3 compd. melts incongruously to 1:1 and liq. at 1235° and the 1:5 compd. melts congruously at 1095°. None of the La phosphates have lower temp. limits of stability. .

Detail of "1312-81-8"

Lanthanum oxide

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Reference