Celestite
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Celestite

MGT Mineral Company as a major producer, supplier and exporter of several minerals and materials in the Middle East, is located in Iran. MGT Mineral Company has a lot of experience in exporting and is active in case of Celestite supplying. 

Celestite (SrSO4) also known as Celestine is a naturally occurring form of strontium sulfate. It is very similar to Barite (barium sulfate), but less common. Celestite occurs in sedimentary rock formations, especially in dolomite and dolomitic limestone. Celestite is mined industrially as a main source of strontium. Celestite also forms with other colorful minerals, making very nice combinations. Bright yellow sulfur with blue Celestite is one of the most famous colorful combinations of minerals. The ideal composition of Celestite is: SrO 56.42 % SO3 43.58 %.

Iran Celestite, Celestite

 

Iran has several Celestite mines and great potentiality for exporting this precious material. Therefore, Iran is one of the best Celestite suppliers of the Middle East. MGT Mineral Company has a great ability to satisfy all necessary conditions for exporting.

 

 

Physical Properties of Celetite
Chemical Formula SrSO4
Cleavage {001} Perfect, {210} Good
System Orthorhombic
Color Blue, Brown, Colorless, Green, Gray
Density 3.9-4 g/cm3
Diaphaneity (Transparency) Transparent to subtranslucent
Fracture Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments
Tenacity Brittle
Habit Crystalline - Coarse - Occurs as well-formed coarse sized crystals; Granular - Generally occurs as anhedral to subhedral crystals in matrix; Massive - Uniformly indistinguishable crystals forming large masses.
Hardness (Mohs) 3-3.5
Luminescence Fluorescent, Short UV=yellow, white blue, Long UV=yellow, white blue
Luster Vitreous (Glassy)
Streak white
Magnetism Nonmagnetic

Celestite Occurrence

Celestite occurs mainly in roughly lenticular masses, from a few inches to several feet in breadth, with the longer dimensions commonly parallel to the bedding; and the celestite-bearing zones, which are rarely of any great horizontal extent, appear to occupy solution cavities. The mineral occurs much more abundantly in the upper than the lower beds, and is at present particularly concentrated in the northeastern corner of the quarry, where the beds show a slight doming. Not only is more Celestite present, and in larger crystals, but cavities, both filled and unfilled are larger and more numerous in this section. If the doming is the result of orogenic stresses, the resultant tension in the uppermost strata may have facilitated the development of solution cavities and replaCement bodies at this location.

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In the lower level the rock is less cavernous, and Celestite is not so frequently found, but when present is observed to be in flat bladelike crystals, or in compact crystalline masses. Here also cavities are sometimes found filled with clay, which may contain Celestite crystals. A border of white crystalline Celestite may surround these pockets.

Celestite Usages

Almost all Celestite (99%) is used in the production of strontium carbonate. There are four main uses for Strontium Carbonate.

The USGS estimated the distribution of strontium compounds by end use. Of the six operations to which a survey request was sent, five responded. The information collected from this survey and the information provided by the U.S. 

In 2000, more than 85% of all strontium was consumed in ceramics and glass manufacture, primarily in television faceplate glass and secondarily in ceramic ferrite magnets and other ceramic and glass applications. Since 1970, production of faceplate glass for color television picture tubes had been the major use of strontium.

All color televisions and other devices containing color cathode-ray tubes (CRTs) sold in the United States were required by law to contain strontium in the faceplate glass of the picture tube to block x-ray emissions. Major manufacturers of television picture tube glass incorporated, by weight, about 8% strontium oxide in their glass faceplate material. Added to the glass melt in the form of strontium carbonate, it was converted to strontium oxide. In addition to blocking X rays, strontium improves the appearance of the glass and the quality of the picture and increases the brilliance.

Permanent ceramic magnets were another large end use for strontium compounds in the form of strontium ferrite. These magnets were used extensively in small direct current motors for automobile windshield wipers, loudspeakers, other electronic equipment, toys, and magnetically attached decorative items. Strontium ferrite magnets have high coercive force and high thermal and electrical resistivity and are chemically inert. They retain their magnetism well, are not adversely affected by electrical currents or high temperatures, do not react with most chemical solvents, and have a low density. 

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Substitution of strontium by barium is possible in some cases. However, there could be an adverse impact on performance of such materials as colour television picture tube glass and production costs may increase.

 

 

 

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