I. Introduction and Definition.- II. Geometrical Derivation of Simple Layer-Type Structures.- 1. Coordination Numbers 9 and 8.- 2. Coordination Number 6: Trigonal Prism.- 3. Coordination Number 6: Octahedron.- 4. Coordination Number 4: Tetrahedron.- 5. Coordination Number 3: Trigonal Pyramid and Triangle.- III. Repartition of the Layer Structures.- IV. Discussion of Special Compounds.- 1. Compounds with Coordination Number 2.- a. AuI.- b. HgCl2.- c. HgBr2.- 2. Compounds with Coordination Number 3.- a. Sassolite B(OH)3.- b. Metaboric Acid HB02.- c. The B2S3 Structure.- d. The BCl3 Structure.- e. Graphite.- f. Boron Nitride.- g. Non-symmetrical Graphite Analogs, B2O.- h. Graphite Intercalation Compounds.- ?. Metal-Graphite Compounds.- ?. Graphite Salts.- 3. Compounds with Lone-Pair Cations (CN 3 ?6).- A. Phosphorus-Group Chalcogenides.- a. M2X3 Compounds with CN3.- b. Claudetite As2O3(h).- c. Orpiment As2S3.- d. As2Te3.- e. Kermesite Sb2S2O.- f. Getchellite AsSbS3.- g. Wolfsbergite-Type Compounds.- h. Livingstonite HgSb4S8.- i. CuTe2Cl (see Appendix).- B. Group V Elements and Isoelectronic Compounds.- a. The Arsenic Structure.- b. Superstructures Derived from the As Structure: GeTe, SnP3.- c. The Black Phosphorus and SnS Structure.- d. Hittorf's Phosphorus.- e. Yellow PbO (Massicot).- f. Red PbO (Litharge).- g. Red SnO.- C. Various Compounds with s2 Cations.- a. Na2PbO2, LiBiO2, NaAs02 , ...- b. Lanarkite Pb2O(SO4).- c. Pb3(PO4)2(r).- d. SbPO4 and Related Phases.- e. Tellurite ?-TeO2.- f. 2TeO2*HN03.- g. Mixed TeIVOxides: Te2O5, H2Te2O6 and Te4O9.- h. Li2TeO3.- i. A Layered Sulfate, (IO)2SO4.- j. SnCl2.- k. Tl Chalcogenides Tl2X and Tl4X3.- 4. MX and MX2: Phases with Low Coordination Number.- a. In and Tl Monohalides and Alkali Hydroxides.- b. LiOH and Related Structures.- c. CuTe.- d. ?-NiTe.- e. Tetrahedral MX2 Structures (HgI2, AlPS4, GaPS4, GeS2).- 5. Polycationic Tetrahedral Layer Structures.- a. GeAs2-Type Compounds.- b. Layer-Type Group III Monochalcogenides and Group IV Monopnictides.- 6. Compounds with Polycationic Layers.- 7. Compounds with d8 Cations in Square-Planar Coordination.- a. PdS2 and PdPS.- b. Pd3(PS4)2.- c. AuTe2Cl.- d. AuCl3 and AuBr3.- e. AuSe (see Appendix).- 8. Oxides with Cation-Coordination Numbers 4 ?6.- a. P2O5.- b. The d0 Transition-Element Oxides and Related Hydroxides.- C . Tc2O7.- d. Re2O7.- e. MoO3 and Related Phases.- f . MoO3*2H2O and MoO3*H2O.- g . Mo18O52.- h. Layered Vanadium Oxyhydroxides.- i. V2O5.- 9. Close-Packed Structures with Group II and III Cations in Tetrahedral and Octahedral Coordination.- 10. Layer Compounds with B Metal Cations in Octahedral Coordination.- a. Non-Transition-Element CdI2-Type Chalcogenides.- b. Tetradymite (Bi2Te2S)-Type Compounds.- c. Layer Structures Based on NaCl-CdI2-Type Mixtures.- d. Tetradymite-Bismuth Composites.- 11. Transition-Element Compounds with Octahedral Cation Coordination.- a. Smythite Fe3S4.- b. (Fe,Ni)3Te2(h).- c. Pt2Sn3.- d. The Structures of PtTe (ZrCl), Pt3Te4 and Pt2Te3.- e. The FePS3 and the FePSe3 Structures.- f. CdI2-Type Transition-Element Chalcogenides.- g. The NbTe2 Structure.- h. Calaverite, Krennerite and Sylvanite.- i. PtBi2(h2).- j. Pt4PbBi7, MoTe2(h) and WTe2.- k. ReSe2 and TcS2.- 12. Group V and VI Dichalcogenides with Trigonal-Prismatic Cation Coordination.- 13. Compounds with Cation Coordination Number ?8.- a. Layer-Type Rare-Earth Polytellurides.- b. PdBi2(h).- c. The ZrSe3 Structure.- d. The HfTe5 Structure.- e. TaSe3.- f. NbSe3.- 14. Mixed-Anion Compounds MXY.- a. The PbFCl (Matlockite) Structure.- b. The SmSI Structure.- c. The ?-ZrNCl Random Structure.- d. The FeOCl and the ?-FeO(OH) Structure.- e. The AlOCl Structure.- f. The InTeCl Structure.- 15. Layer-Type Dihalides.- a. Halides with Trigonal-Prismatic Cation Coordination.- b. CdCl2- and Cdl2-Type Halides.- c. Cr and Cu Dihalides.- d. The Brucite-Type Hydroxides.- e. Mixed Hydroxyhalides.- f. Composite Layer Structures Derived from Brucite.- g. White Lead Pb(OH)2*2PbCO3.- h. Composite Layer Structures with Incommensurate Sublattices.- i. The Composite Layer Structure of Lithiophorite.- 16. MX3 Halides.- a. The PuBr3 Structure.- b. Rare-Earth Hydroxychlorides.- c. CdCl2-/CdI2-Type Derivatives (TiCl3, BiI3, AlCl3, CrCl3).- d. MoCl3.- e. The NbS2Cl2 Structure.- f. Nb3Cl8, Nb3Br8, NbCl4.- g. Al(OH)3.- h. Rhenium Trihalides.- i. The AsBr3 Structure.- j. Group III Halides (AlBr3, GaCl3, InI3).- 17. Layer-Type Halides of Composition MX4, MX5 and MX6.- a. The UBr4 Structure.- b. The ThI4 Structure.- c. SrCl2*2H2O and BaCl2*2H2O.- d. The ZrCl4 Structure.- e. The SnF4 Structure.- f. UO2(OH)2 and UO2F2.- g. WO2Cl2 and WO2I2.- h. The NbI5 Structure.- i. Triclinic UCl5.- j. The ?-WCl6 Structure.- k. Cr(OH)3*3H2O.- 18. Layered Silicates Derived from Brucite and Bayerite.- References.- Mineral Name Index.- Formula Index.
