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(NH 4 )[GaCl 4 ] and (NH 4 )[InCl 4 ] Revisited
Author(s) -
Timofte Tudor,
Bremm Stephan,
Mudring AnjaVerena,
Meyer Gerd
Publication year - 2009
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.200900008
Subject(s) - orthorhombic crystal system , tetragonal crystal system , crystal structure , chemistry , scheelite , crystallography , ion , stoichiometry , crystal (programming language) , tungsten , organic chemistry , computer science , programming language
(NH 4 )[GaCl 4 ] and (NH 4 )[InCl 4 ] are obtained by reaction of equimolar amounts of NH 4 Cl and GaCl 3 or InCl 3 , respectively, under dry inert gas conditions. (NH 4 )[GaCl 4 ] crystallizes with the baryte (BaSO 4 ) type of structure in the orthorhombic crystal system [ Pnma , no. 62, a = 1098(3), b = 701(2), c = 931(2) pm, V = 717(3) 10 6 pm 3 , Z = 4]. (NH 4 )[InCl 4 ] adopts the scheelite (CaWO 4 ) type of structure crystallizing with the tetragonal crystal system [ I 4 1 / a , no. 88, a = 699.0(1), c = 1569.5(4) pm, V = 766.8(3) 10 6 pm 3 , Z = 4]. The crystal structures are characterized by both tetrahedral (NH 4 ) + cations and [MCl 4 ] − complex anions. Space and packing requirements of these ions appear to determine the respective structure type adopted.