Holmium carbonates

Holmium forms all its compounds in -i-3 valence state. The metal forms fluoride, hydroxide, phosphate, oxalate, and carbonate that are insoluble in water. Its water-soluble salts are chloride, bromide, iodide, acetate, nitrate and sulfate. 

Holmium oxide is prepared by thermal decomposition of carbonate, oxalate, hydroxide, nitrate, sulfate, or any oxo salt of holmium ... 

The lutetium hahdes (except the fluoride), together with the nitrates, perchlorates, and acetates, are soluble in water. The hydroxide oxide, carbonate, oxalate, and phosphate compotmds are insoluble. Lutetium compounds are all colorless in the solid state and in solution. Due to its closed electronic configuration (4f " ), lutetium has no absorption bands and does not emit radiation. For these reasons it does not have any magnetic or optical importance, see also Cerium Dysprosium Erbium Europium Gadolinium Holmium Lanthanum Neodymium Praseodymium Promethium Samarium Terbium Ytterbium. 

Aluminum calcium silicate Ammonium polyphosphate Bauxite Boron carbide Calcium lignosulfonate Calcium oxide Carbon Holmium oxide Lanthanum oxide Magnesium oxalate dihydrate... 

The bond angles at holmium and erbium as well as the lanthanide-carbon bond lengths in this electron deficient organolanthanide compounds (table 25) are comparable with those in other electron-deficient compounds with other metal atoms (Schumann and Bruncks, 1982 Schumann et al., 1984a). 

More recently the reaction of (C5H5)2RC1 with QLi has been shown to yield (CsH5)2RQ (R = Gd, Er, and Yb) (Tsutsui and Ely, 1974, 1975 Ely and Tsutsui, 1975). These compounds in which Q is methyl, phenyl, or phenylacetylide are among the very few lanthanide compounds in which there are well-characterized metal-carbon cr-bonds. A di-phenylacetylide of holmium was also prepared from Ho(C5H5)Cl2-THF. The compounds are sensitive to oxygen and moisture and decompose in air in a matter of seconds, but they have high thermal stabilities. 

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