Celestine structure

The structure of celestine is similar to that of barites, with Sr taking the place of Ba. 

Strontium. Sr at no 38 at wt 87.62 valence 2 two important radioactive isotopes (out of 12), Sr-89 and Sr-90 four stable isotopes, 88 (82.56% abundance), 86 (9.86% abundance), 87 (7.02% abundance), 84 (0.56% abundance) silvery-white metal, face-centered cubic structure brief exposure to air results in the yel oxide mp 752°, 757°, 769° (separate values) bp 1366°, 1384°, 1390° (separate values) d 2.6g/cc. Sol in acids, ethanol and liq ammonia. CA Registry No [7440-24-6]. Occurs in nature as the sulfate celestine or the carbonate strontianite also found in small quantities associated with Ba, Ca, Pb or K minerals. Prepn is by a) electrolysis of molten Sr chloride in a graphite crucible with cooling of the upper cathodic space to isolate the Sr vapors, or b) thermal redd of the oxide... 

The structure of celestine is similar to that of barites, with Sr taking the place of Ba. Steady-state luminescence of celestine is characterized by broad bands, which are associated with adsorption of water-organic complexes (Tarashchan 1978). The natural celestine in our study consisted of five samples. Laser-induced time-... 

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