Compound isostructural

Sphalerite and wurtzite structures general remarks. Compounds isostructural with the cubic cF8-ZnS sphalerite include AgSe, A1P, AlAs, AlSb, BAs, GaAs, InAs, BeS, BeSe, BeTe, BePo, CdS, CdSe, CdTe, CdPo, HgS, HgSe, HgTe, etc. The sphalerite structure can be described as a derivative structure of the diamond-type structure. Alternatively, we may describe the same structure as a derivative of the cubic close-packed structure (cF4-Cu type) in which a set of tetrahedral holes has been filled-in. This alternative description would be especially convenient when the atomic diameter ratio of the two species is close to 0.225 see the comments reported in 3.7.3.1. In a similar way the closely related hP4-ZnO... 

Miscellaneous. Reduction of a palladium salt by CO is the basis of a visual test for ambient carbon monoxide (227). Palladium compounds are used as photographic sensitizers (228). The low dimensional mixed valence compound Csq 3[Pd(S2C2(CN)2)] 0.5H2O behaves as a semimetal at room temperature (229). Palladium compounds isostructural with potent platinum antitumor compounds have poor antitumor activity (230). 

FeOCl. The layers in this structure are of the same type as in 7-FeO. OH but they are packed together in a rather different way, as described on p. 528. The FeOCl structure is closely related to that of BiOCl as may be seen by comparing the elevation of FeOCl (Fig. 10.17) with that of BiOCl (Fig. 20.6(c), p. 715) the essential difference is that in FeOCl M is 6-coordinated and in BiOCl 8-coordinated. Bond lengths in FeOCl are as shown. Compounds isostructural with FeOCl include InOCI and InOBr. InOI,( > VOCl and TiOCl, and CrOCl. )... 

These include a number of compounds isostructural with silicates or phosphates, for example ... 

Tetrahedral coordination of Fe(ii) is comparatively rare, and in fact has not yet been directly established by a structure determination. It has been deduced from the existence of compounds isostructural with analogous compounds of Mn, Co, or Ni ... 

Xhe many actinide compounds isostructural with this compound are listed in Table 5. a) mean distance of the atoms from the two perpendicular planes through the dodecahedron, intersecting in the 4 axis. 

Tananaev (56) recently reported the synthesis and characterization of ternary alkali hydroxide complexes of AmOt in AOH solution (A = Li, Na, or K). Two different ternary hydroxy compounds were obtained, depending on the concentration of the base yellow AAm02(OH)2 xTLO (A = Li to K) precipitated from 0.1-0.5 Af AOH solution, while brown A Am02tOH)o xHoO (A = Na and K) was isolated fi om solutions with AOH concentrations higher than 2 Af. Both compounds isostructural with the corresponding NpO compounds. 

A range of shiny metallic compounds featuring trigonal planar anions SnX3 (X = As, Sb, Bi) have been characterized with composition M6(SnX3)Oo.5 (M = Rb, Cs) the Sn and X atoms in SnX3 (isostructural with C03 ) are coordinated by trigonal prisms of 6M+, and the ions occupy octahedral sites in the M+ lattice. 

The compound AS2O3CI4 is polymeric and is thus not isostructural with Cl2P(0)0P(0)Cl2-... 

These compounds are isostructural with the corresponding compounds of Ce (see Fig. 30.5, p. 1245) and can be visualized as octahedral if each is considered to occupy a single coordination site. 

All the trihalides are mixed valence compounds. PtF3 is isostructural with PdF3- PtX3 (X = Cl, Br, I) cannot be made by straightforward thermal decomposition of PtX4 [22] under open conditions but by routes involving continuous decomposition and formation under closed, equilibrium conditions. 

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