Zirconium orthosilicate

Hafnium is obtained commercially from mineral zircon, which is zirconium orthosilicate [14940-68-2]. Zircon usually contains hafnium oxide, Hf02, in an amount that ranges between 1 to 2%. Zircon sand is separated from heavy... 

Synonyms zircon hyacinth zirconium orthosilicate Occurrence and Uses... 

Integrating the data for the aluminum, magnesium, and zirconium orthosilicates leads to the tentative conclusion that the smaller the cation valence, the more severe will be the surface alteration. In general, the calculated ZPC should most closely approximate reality for tri- and quadrivalent cations. It should represent a basic limit for mono- and bivalent cations. 

Zirconium is found in at least 37 different mineral forms (6) but the predominant commercial source is the mineral zircon, zirconium orthosilicate. Other current mineral sources are baddeleyite and eudialyte [12173-26-1]. 

Zirconium Silicate. Zirconium orthosilicate. 04SiZr mol wt 183.31. O 34.91%, Si, 15.32%, Zr 49.76%. ZrSi04, Occurs in nature as the mineral zircon. Widely scattered in all kinds of rocks and in beach sand (South Carolina, Northeast Florida). Usually separated from sand by electrostatic and electromagnetic elutriation, yielding 99% pure ZrSi04. Prepn frnm SiO, and Zr02 in an arc furnace Curtis, Sowman, J. Am. Ceram. Soc. 36, 195 (1953) can also be made from solns of zirconium salts and sodium silicate. 

ZnS04 6H20 ZINC SULFATE HEXAHYDRATE 1846 ZrSi04 ZIRCONIUM ORTHOSILICATE 1882... 

Zirconium orthosilicate. See Zirconium silicate Zirconium orthosulfate CAS 19696-82-3... 

Synonyms Hyacinth Silicic acid, zirconium salt (1 1) Silicic acid, zirconium (4+) salt (1 1) Zircon Zirconium orthosilicate Zirconium (IV) silicate (1 1)... 

Various inorganic esters have been claimed as coupling agents for reinforced plastics, including aminobenzyl phosphonates, dicetylisopropylborate, alkoxy compounds of aluminum, zirconium and titanium, zircoaluminates, and numerous substituted titanates [1]. These metal alkoxides could function in a similar manner to the orthosilicates by reacting with hydroxylated substrates. Like the simple orthosilicates such as tetraethyl orthosilicate (TEOS), it is less evident how an-... 

Zirconium is found in small amounts widely spread throughout nature, occurring in many alluvial deposits of lake and stream beds and ocean beaches. The most important mineral is zircon, or zircon orthosilicate, ZrSi04. Other zirconium minerals are eudialite, (Na, Ca, FeleZrSieOislOH, Cl), and baddeleyite, Zr02. It also occurs in monazite sand. The abundance of zirconium in the earth s crust is estimated as 165 mg/kg. 

From Ethoxides A mixture of tetramethyl orthosilicate and zirconium w-propoxide was hydrolyzed in 4 (mol water/mol Zr -t Si) parts of water at room temperature. The precipitate was washed in warm water and calcined at 500°C for 3 h. 

T3.8.2.3 Obtained in Microemulsion Ammonium hydroxide was added to a solution containing Igepal Co520 (surfactant) and cyclohexane, and the mixture was shaken to obtain a microemulsion. Solutions of zirconium n-propoxide in acetylacetone and n-butanol (l 0.5 3) and of tetraethyl orthosilicate in water and ethanol (1 1 4) were mixed for 3 h, and the mixture was added to the microemulsion with stirring, and hydrolyzed for 3 d. The final concentrations of alkoxides were 0.0075 M, the water surfactant molar ratio was 0.8, and the water alkoxide molar ratio was 10. The powder was washed with acetone and heated at 900°C for 2 h. 

Zn2Si04 ZINC ORTHOSILICATE (WILLEMITE) 1838 Zrl[g] ZIRCONIUM MONOIODIDE (GAS) 1873... 

ZrSi04 zirconium n-propoxide, tetraethyl-orthosilicate Igepal Co520/cyclohexane/ammonia 65 Support material 65... 

The most abundant Zr mineral is zircon, ZrSi04, a tetragonal orthosilicate, frequently found in a prismatic, pyramidal habit, with Zr coordinated to eight oxygen atoms. A relatively common oxide is baddeleyite, Z1O2, a monoclinic mineral found in prismatic habit Other less common minerals are calzirtite, CaZrjTiO, and zirconolite, CaZrjTijOy, where zirconium appears associated with calcium and titanium. All these minerals can be found as primary or secondary. Hafnium is a common substituent for Zr, and rare earths such as yttrium are also found. 

A process by which zirconium metal can be produced from the mineral zirconium(lV) orthosilicate, ZrSi04, starts by reacting it with chlorine gas to form zirconium(IV) chloride ... 

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