Strontium sulfide, preparation

Cement, laboratory, 1 189 Cerite, extraction of, 2 44 Cerium, phosphor containing strontium sulfide and, 3 23 separation of, from rare earth mixtures, 2 43, 47, 48 test for, 2 50 Cerium amalgam, 1 15 Cerium-group earths, separation of, from yttrium earths by doublesulfate method, 2 44, 46 Cerium (III) magnesium nitrate, 2Ce(N03)s-3Mg(N03)2-24H,0, separation of praseodymium from lanthanum by, 2 57 Cerium(III) nitrate, 2 51 Cerium (IV) nitrate, basic, 2 49 Cesium, cesium azide for preparation of, 1 79... 

Strontium amalgam, 1 11 Strontium chloride, for preparation of strontium sulfide and selenide phosphors, 3 21... 

Strontium nitrate, for preparation of strontium sulfate or strontium selenite, 3 17 Strontium selenide, 3 20 phosphors, 3 11, 22 Strontium selenite, for preparation of strontium selenide, 3 20 Strontium sulfate, for preparation of strontium sulfide, 3 19 Strontium sulfide, 3 20 phosphors, 3 11, 21, 23 Structure, of 1,3-diketones, 2 10 electronic, of rare earth elements, 2 30... 

Strontium Snlfide. SSr mol wt 119.7O. s 26.79%, Sr 73,21%. SrS. The article of commerce contains 65-75% SrS. Strontium sulfide made by reduction of the sulfate is not luminous the. luminous sulfide is prepared by heating strontium hydroxide with sulfur. 

Rare earth element doped alkaline earth sulfides are employed in luminescence-based devices like thin film electroluminescent displays [119,120] and devices for optical data storage [121]. Strontium sulfide, SrS, thin films have been prepared by atomic layer epitaxy from [Sr(tmhd)2] (tmhd" 7) in the presence of HiS [122]. Additionally, solid sources have been employed in a comparable CVD approach [122b]. 

The carbonate is prepared from celestite by mixing the mineral with powdered coal and heating the mixture to llOO C. Strontium sulfide is formed and is dissolved in water. Strontium carbonate is precipitated by adding carbon dioxide or soda. Elemental sulfur is an important byproduct Germany and Mexico are the largest pro-... 

A sample of a strontium titanium sulfide Sr TiS3 was found to have a unit cell in which the repeat distance of the T1S3 chains, cTis, was found to be 0.30 nm and that of the Sr chains, cSr, was found to be 0.54 nm (Fig. 4.38). It is found that 5.5 Sr units fit with 10 TiS3 units. What is (a) the composition and (b) the approximate unit cell c parameter Another preparation has a composition Srj i2TiS3. (c) What is the new approximate unit cell c parameter ... 

Some of the procedures outlined below have been described previously. " They are designed for the preparation of phosphors that are to be used for quantitative studies of luminescence. Details are presented for the preparation of strontium nitrate, strontium chloride, strontium sulfate, and strontium selenite in a state of high purity for the reduction of the sulfate to the sulfide and the selenite to the selenide and for the conversion of the sulfide and the selenide into typical infrared-sensitive phosphors. 

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