Publikationsdatum:
2018-03-09
Beschreibung:
. Three polymorphs of barium dihydrogen-hypodiphosphate(IV)-dihydrate, BaH2P2O6 ∙ 2H2O (A, B and C), have been obtained and structurally characterized by single crystal X-ray diffraction. A crystallizes in the monoclinic space group P21/n (No. 14) with a = 7,459(1) Å, b = 8,066(1) Å, c = 12,460(2) Å, β = 91,27(1)° and Z = 4. B crystallizes in the monoclinic space group C2/c (No. 15) with a = 11,049(8) Å, b = 6,486(3) Å, c = 10,956(6) Å, β = 106,89(5)° and Z = 4. C crystallizes in the orthorhombic space group C2221 (No. 20) with a = 9,193(3) Å, b = 6,199(2) Å, c = 12,888(4) Å and Z = 4. Discrete [H2P2O6]2− units, barium cations and water molecules, held together by intermolecular hydrogen bonds of the type O-H∙∙∙O, build up the structures of the three polymorphs. The phase purity of A and C was verified by powder diffraction measurements.
Print ISSN:
0044-2313
Digitale ISSN:
1521-3749
Thema:
Chemie und Pharmazie
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