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Préparation et Structure Cristalline d'un Nouveau Composé en Couches Rb2MoO2As2O7

✍ Scribed by Mohamed Faouzi Zid; Ahmed Driss; Tahar Jouini


Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
780 KB
Volume
141
Category
Article
ISSN
0022-4596

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A new molybdenylarsenate NaMoO 2 AsO 4 has been isolated. The single-crystal X-ray diffraction study of this phase has shown that it is noncentrosymmetric. It crystallizes in the Pca2 1 (No. 29) space group with a‫,)3(177.41؍‬ b‫,)2(665.6؍‬ c"10.101(1) A s , Z‫,8؍‬ V‫)4(7.979؍‬ A s 3 , R(F 2 ‫,920.0

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The rubidium oxochromium (III) arsenate Rb 2 Cr 2 O(AsO 4 ) 2 crystallizes in the Pnma (no. 62) space group with a ‫؍‬ 8.546(3) A s , b ‫؍‬ 5.665(1) A s , c ‫؍‬ 18.464(5) A s , V ‫؍‬ 893.9(4) A s 3 , Z ‫؍‬ 4, R(F 2 ) ‫؍‬ 0.037, R w (F 2 ) ‫؍‬ 0.090 for 766 reflections with F 2 > 4 (F 2 ). The struct