Crystal Data for (NH 4 ) 3 AsCr 4 O 16  and K 3 AsCr 4 O 16  the first examples of quaternary arsenic | Zendy

AverbuchPouchot M.T. | Zendy; Durif A. | Zendy

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Crystal Data for (NH 4 ) 3 AsCr 4 O 16 and K 3 AsCr 4 O 16 the first examples of quaternary arsenic

Author(s) -

AverbuchPouchot M.T.,

Durif A.

Publication year - 1981

Publication title -

zeitschrift für anorganische und allgemeine chemie

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.354

H-Index - 66

eISSN - 1521-3749

pISSN - 0044-2313

DOI - 10.1002/zaac.19814760528

Subject(s) - tetrahedron , monoclinic crystal system , salt (chemistry) , crystallography , ammonium , crystal (programming language) , ion , potassium , arsenic , crystal structure , chemistry , quaternary , unit (ring theory) , inorganic chemistry , materials science , geology , computer science , mathematics , organic chemistry , paleontology , mathematics education , programming language

We describe chemical preparations and give crystal data for two new arsenatochromates: (NH 4 ) 3 AsCr 4 O 16 and K 3 AsCr 4 O 16 isotypic with K 3 PCr 4 O 16 . Both are monoclinic (Cc) with the following unit cells: a = 9.724(5), b = 11.98(5), c = 14.88(5)Å, β 105.82(5)º for the ammonium salt and a = 9.323(5), b = 12.03(5), c = 14.62(5) Å, β 105.25 (5)º for the potassium salt. The main feature of these salts is the geometrical configuration of the finite AsCr 4 O 16 anion: a central AsO 4 tetrahedron sharing its four corners with CrO 4 tetrahedra. Up to now, these salts are the first example of a quaternary arsenic in a finite anion.

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