AbstraetThe compound is orthorhombic. The unit cell, with a = 9.997 (3), b = 5.477 (2), c = 18.443 (10) A, contains four formula units, arm = 2.48; d x = 2.50 Mg m-3; /~(Mo Ka) = 2.78 mm -1. The crystal structure has been solved in space group Pnam from single-crystal data collected on an automated diffractometer by Patterson and Fourier syntheses and refined by least-squares methods. With anisotropic temperature factors, the final R value is 0.033 for 783 independent observed reflexions corrected for absorption effects. The crystal structure can be described in terms of layers perpen-0567-7408/79/071580-04501.00 dicular to the c axis consisting of indium atoms joined to four others by SO 4 groups. The coordination polyhedron around the indium atoms is completed by the water molecules forming an InO4(OH2) 2 distorted octahedron. These layers are linked together by oxonium ions. One H502 + joins two sheets by the intermediary of short hydrogen bonds. In view of these results, the compound must be formulated as (HsO2)+[In(H20)2 -(SO4)2]-and named: diaquadisulfatoindic(III) acid dihydrate.This conclusion can be extended to acids HM(SO4) 2. 4HzO with M = AI, Ga, TI, V, Fe and Ti.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.