Cdlj type

Tlic CdCl2 and the Cdl2 type are also layer structures (Fig. 16.9 because there exist numerous stacking variants of Cdl2, some authors prefer the term Cd(011)2 type instead of Cdlj type). The octahedra in the layer share six edges each. The structure of the layer is tire same as in an MX3 layer if the voids in the MX3 layer were occupied by M atoms. Every halogen atom is shared by three octahedra (MX6/3). The stacking variants of the layers arc ... 

Cdlj type (Cd(0H)2 type) hexagonal closest-packing of X atoms... 

The VS2 produced in this manner is a shiny metallic gray powder. The compound is hexagonal (Cdlj type) with a = 3.217 A and c = 5.745 A. Sulfur loss occurs in air or inert gas above 300°. 

Co (II) [A] (3d) Simple compounds With hydroxide and nitrite / -Co(OH)2 300--450 5.2 + 20 a.c. hexagonal layer structure of Cdlj type determined from Curie-Weiss law antiferromagnetic, n=12.3 K magnetization measured at 4.2 K 66T1, 66M15, Fig. 250, 251... 

COjSjZr x O.45 P3ml See Fig. 139 Z=1 Intercalation in Cdlj-type. X, powder. Direct reaction of Co powder with ZrS2 in evacuated silica tubes at 900 °C. Black. 72Tril, 75Tril... 

Then the phase transition temperature, P-j-, from the Cdlj- to the NiAs-type structure is calculated as... 

The third type of layer found in this group of compounds is the Cdl2 layer, this structure being adopted by the dihydroxides of Mg, Ca, Mn, Fe, Co, Ni, and Cd. (In addition to the simple Cdlj structure some of these compounds have other structures with different layer sequences, as in the case of some dihalides.) Each OH" forms three bonds to M atoms in its own layer and is in contact with three... 

Yb Srij-type solid solution Srij, multiple (polytypes), Cdlj x = 0.2,1.7 Not studied Voos-Esquivel and Eick (1987) Lasocha et al. (1988) ... 

The samples of calcium hydroxide used in these studies were commercially available and while every effort was made to protect them from exposure to the atmosphere, no purification was undertaken. Commercial calcium hydroxide is obtained by the hydration of calcium oxide, which in its turn had been obtained from the thermal decomposition of limestone -calcium carbonate-. Small amounts of impurities are known to be present, and include magnesium hydroxide (magnesium is always present in small amounts in calcium ores), undecomposed calcium carbonate and traces of quartz. This procedure yields a calcium hydroxide with a Cdlj-like layer hexagonal structure, of the brucite [Mg(OH)2] type. This was confirmed by powder X-ray diffractometry. 

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