Describe how the structures of the following compounds could be described in terms of the simple structure types of Table 4.4 but with complex ions replacing simple monoatomic cations and anions. 

(a) K₂PtCl₆, 

(b) [Ni(H₂O)₆][SiF₆], 

(c) CsCN 

(d) CsPF₆.

Transcribed Image Text:

TABLE 4.4 The crystal structures of compounds, at standard conditions unless otherwise stated Crystal structure Examples* Antifluorite KO, K,S, LI,O, NaO, Na,Se, Na, S Caesium chloride CsCI, TII (low 7), CsAu, CsCN, CuZn, NbO Fluorite Nickel arsenide Perovskite Rock salt Rutile Sphalerite (zinc blende, cubic) Spinel Wurtzite (hexagonal) CaF, UO, HgF, LaH, PbO (high pressure, >6 GPa) NIAS, NIS, FeS, PtSn, CoS CATIO, (distorted), SrTiO, PbZrO, LaFeO, LiSrH, KMnF, NaCI, KBr, Rbl, AgCl, AgBr, MgO, SrO, TIO, FeO, NiO, SnAs, UC, SN TiO (one polymorph), MnO, SnO,WO,, MgF, NIF, ZnS (one polymorph), CUCI, CdS (Hawleyite polymorph), Hgs, GaP, Agl (at high pressure, >6 GPa, transforms to rock-salt structure), InA, ZnO (high pressure, >6 GPa) MgAlO, ZnFeO, ZnCrS, ZnS (one polymorph), ZnO, BeO, Agl (one polymorph, iodargyrite), AIN, SIC, NH,F, CdS (Greenockite polymorph) "A substance in bold type is the one that gives its name to the structure.