New Diffraction Data

Chemical preparation and XRD data for four cyclotriphosphates: Ba₃(P₃O₉)₂·4H₂O, BaNH₄P₃O₉·2H₂O, BaTlP₃O₉·2H₂O, and BaTlP₃O₉·Ba₃(P₃O₉)₂·4H₂O

A. Kheïreddine^a1 c1, M. Tridane^a1 and S. Belaaouad^a1 c1

^a1 Laboratoire de Recherches de Chimie—Physique Générale des Matériaux, Faculté des Sciences Ben M'sik, B. P. 7955. Bd Cdt Driss El Harti, Université Hassan II- Mohammedia, Casablanca, Morocco

Abstract

Methods of chemical preparation and XRD data are reported for four cyclotriphosphates associated with barium alone and with ammonium and thallium. These phosphates are Ba₃(P₃O₉)₂·4H₂O, BaNH₄P₃O₉·2H₂O, BaTlP₃O₉·2H₂O, and BaTlP₃O₉·Ba₃(P₃O₉)₂·4H₂O was prepared by the direct method of chlorures, BaNH₄P₃O₉·2H₂O and BaTlP₃O₉·2H₂O by the method of ion-exchange resin, and BaTlP₃O₉ by total dehydration of BaTlP₃O₉·2H₂O. Ba₃(P₃O₉)₂·4H₂O is monoclinic, space group P2₁ /n, Z = 4, with a = 7.546(3), b = 12.105(4), c = 11.649(4) Å, β = 100.340(3)°, V = 1046.8(2) Å³, M(20) = 81, and F(20) = 117(0.003 419, 50). BaNH₄P₃O₉·2H₂O is monoclinic, space group P2₁ /n, Z = 4, with a = 7.547(1), b = 12.065(1), c = 11.697(1) Å, β = 101.111(1)°, V = 1045.1(3) Å³, M(20) = 9 (AV.EPS = 0.000 116 9), and F(20) = 14(0.0287 06, 53). BaTlP₃O₉·2H₂O is monoclinic, space group P2₁ /n, Z = 4, with a = 7.546(3), b = 12.105(4), c = 11.649(4) Å, β = 100.340(3)°, V = 1046.8(2) Å³, M(20) = 81, and F(20) = 117(0.003 419, 50). BaNH₄P₃O₉·2H₂O and BaTlP₃O₉·2H₂O are isostructural. BaTlP₃O₉ is orthorhombic, space group P2₁2₁2₁, Z = 4, with a = 11.086(2), b = 12.283(2), c = 5.786(1) Å, V = 787.9(4) Å³, M(20) = 10 (AV.EPS = 0.000 116 9), and F(20) = 14(0.026 955, 56).

(Received December 15 2011)

(Accepted January 03 2012)

Key words

• Ba₃(P₃O₉)₂·4H₂O;
• BaNH₄P₃O₉·2H₂O;
• BaTlP₃O₉·2H₂O;
• BaTlP₃O₉ ;
• X-ray powder diffraction

Correspondence:

^c1 Authors to whom correspondence should be addressed. Electronic mails: kheireddine.aziz@gmail.com and sbelaaouad@yahoo.fr