Barium sulfate
Description: Barium (Ba) is obtained chiefly from the mineral barite. Barium is a soft, silvery, reactive metal. Because barium is so dense it is commonly used in some alloys, for example in spark plugs and ball bearings. As of 2013, China, India and Morocco were the world’s largest producers of barium.  Barite or baryte is a mineral containing barium sulfate. Its name is originally derived from the Greek word “barys” meaning “heavy”. This mineral belongs to the Barite Mineral Group along with anglesite, celestine and anhydrite. It has quite a beautiful appearance. This mineral ore is also known as Heavy Spar, Barytine, Schwerspath, Barytite and Baryte. It is the main source of barium Baryte or barite (Ba S O 4) is a mineral consisting of barium sulfate. The baryte group consists of baryte, celestine, anglesite and anhydrite. Baryte is generally white or colorless, and is the main source of barium. Baryte and celestine form a solid solution (Ba,Sr)SO 4. Baryte that is used as an aggregate in a heavy cement is crushed and screened to a uniform size. Most baryte is ground to a small, uniform size before it is used as a filler or extender, an addition to industrial products, in the production of barium chemicals or a weighting agent in petroleum well drilling mud. Barite is a mineral composed of barium sulfate (BaSO 4). It receives its name from the Greek word barys which means heavy.. This name is in response to barite's high specific gravity of 4.5, which is exceptional for a nonmetallic mineral.  Barium is a chemical element with symbol Ba and atomic number 56. It is the fifth element in Group 2, a soft silvery metallic alkaline earth metal. Because of its high chemical reactivity barium is never found in nature as a free element. The most common naturally occurring minerals of barium are barite (barium sulfate, BaSO 4) and witherite (barium carbonate, BaCO 3), both being insoluble in water. Barium's name originates from the alchemical derivative baryta, which itself comes from Greek βαρύς (barys), meaning heavy.. THE BARITE GROUP OF MINERALS. The barite group is composed of minerals with a similar orthorhombic structure and related chemistry. It is named for its most common member, barite. The general formula for this group is A(SO 4). The A can be either barium, lead or strontium. The structures are of these minerals are rather similar and therefore they form similar crystal habits. The following are the more common members of the Barite Group of minerals: 1  Anglesite (Lead Sulfate). 2  Barite (Barium Sulfate). 3  Celestite or celestine (Strontium Sulfate). ( 4 Barium Chromate Sulfate) Baryte or barite (BaSO4) is a mineral consisting of barium sulfate. The baryte group consists of baryte, celestine, anglesite and anhydrite. Baryte is generally white or colorless, and is the main source of barium. Baryte and celestine form a solid solution (Ba,Sr)SO4. Barite is a mineral composed of barium sulfate (BaSO 4). It receives its name from the Greek word “barys” which means “heavy.” This name is in response to barite’s high specific gravity of 4.5, which is exceptional for a nonmetallic mineral. Barite BaSO 4 c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Orthorhombic. Point Group: 2 /m 2 /m 2 /m. Commonly in well-formedcrystals, to 85 cm, with over 70 forms noted. Thin to thick tabular {001}, {210}, {101}, {011};also prismatic along [001], [100], or [010], equant. 
http://www.mineralseducationcoalition.org/minerals/barium http://www.chemistrylearner.com/barite.html https://en.wikipedia.org/wiki/Baryte http://geology.com/minerals/barite.shtml https://en.wikipedia.org/wiki/Barium http://www.galleries.com/minerals/sulfates/barite.htm http://bariteworld.com/industrial-minerals-products/baryte-and-micronised-barium-sulphate/ http://handbookofmineralogy.org/pdfs/baryte.pdf
barite is in what mineral group