Barium carbonate (BaCO₃), also known as witherite, is a chemical compound used in rat poison, bricks and cement. A chemical formula (also called molecular formula) is a concise way of expressing information about the atoms that constitute a particular chemical compound. ... Molar mass is the mass of one mole of a chemical element or chemical compound. ... Enargite crystals In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms in a crystal. ... In crystallography, the orthorhombic crystal system is one of the 7 lattice point groups. ... CAS registry numbers are unique numerical identifiers for chemical compounds, polymers, biological sequences, mixtures and alloys. ... Density (symbol: ρ - Greek: rho) is a measure of mass per volume. ... In the physical sciences, a phase is a set of states of a macroscopic physical system that have relatively uniform chemical composition and physical properties (i. ... It has been suggested that this article or section be merged with Solution. ... Water is a chemical substance that is essential to all known forms of life. ... The melting point of a crystalline solid is the temperature at which it changes state from solid to liquid. ... The boiling point of a substance is the temperature at which it can change its state from a liquid to a gas throughout the bulk of the liquid at a given pressure. ... The refractive index (or index of refraction) of a material is the factor by which the phase velocity of electromagnetic radiation is slowed in that material, relative to its velocity in a vacuum. ... Mohs scale of mineral hardness characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer. ... Relative density (also known as specific gravity) is a measure of the density of a material. ... In chemistry, the standard state of a material is its state at 1 bar (100 kilopascals) and 25 degrees Celsius (298. ... General Name, Symbol, Number barium, Ba, 56 Chemical series alkaline earth metals Group, Period, Block 2, 6, s Appearance silvery white Atomic mass 137. ... In inorganic chemistry, a carbonate is a salt of carbonic acid. ... A chemical substance is any material substance used in or obtained by a process in chemistry: A chemical compound is a substance consisting of two or more chemical elements that are chemically combined in fixed proportions. ... A rat in urban environment Rat poisons are a category of pest control chemicals intended to kill rats. ... An old brick wall in English bond laid with alternating courses of headers and Brick is an artificial stone made by forming clay into rectangular blocks which are hardened, either by burning in a kiln or sometimes, in warm countries, by sun-drying. ... In the most general sense of the word, cement is a binder, a substance which sets and hardens independently, and can bind other materials together. ...

Witherite crystallizes in the orthorhombic system. The crystals are invariably twinned together in groups of three, giving rise to pseudo-hexagonal forms somewhat resembling bipyramidal crystals of quartz, the faces are usually rough and striated horizontally. Quartz crystal In chemistry and mineralogy, a crystal is a solid in which the constituent atoms, molecules, or ions are packed in a regularly ordered, repeating pattern extending in all three spatial dimensions. ... Quartz is one of the most common minerals in the Earths continental crust. ...

The mineral is named after William Withering, who in 1784 recognized it to be chemically distinct from barytes. It occurs in veins of lead ore at Hexham in Northumberland, Alston in Cumbria, Anglezarke, near Chorley in Lancashire and a few other localities. Witherite is readily altered to barium sulfate by the action of water containing calcium sulfate in solution and crystals are therefore frequently encrusted with harytes. It is the chief source of barium salts and is mined in considerable amounts in Northumberland. It is used for the preparation of rat poison, in the manufacture of glass and porcelain, and formerly for refining sugar. It is also used for controlling the chromate to sulfate ratio in chromium electroplating baths.^[1] William Withering (March 17, 1741 - October 6, 1799) was a British botanist, physician and the discoverer of digitalis. ... Barium sulfate (or barium sulphate, BaSO4) is a compound (a type of salt made from barium and sulphur) frequently used clinically as a radiocontrast agent for X-ray imaging and other diagnostic procedures. ... General Name, Symbol, Number lead, Pb, 82 Chemical series poor metals Group, Period, Block 14, 6, p Appearance bluish white Atomic mass 207. ... Iron ore (Banded iron formation) Manganese ore Lead ore Gold ore An ore is a volume of rock containing components or minerals in a mode of occurrence which renders it valuable for mining. ... See also Hexham, New South Wales, and Hexham (constituency). ... Northumberland is a county in northern England. ... Statistics Population: 1,128 Ordnance Survey OS grid reference: NY716462 Administration District: Eden Shire county: Cumbria Region: North West England Constituent country: England Sovereign state: United Kingdom Other Ceremonial county: Cumbria Historic county: Cumberland Services Police force: Cumbria Constabulary Ambulance service: North West Post office and telephone Post town: ALSTON... Cumbria is a county in the North West region of England. ... Anglezarke is an area of oustanding national beauty in Lancashire that is dominated by a series of reservoirs that supply water to Manchester and Liverpool. ... Statistics Population: 33,424 Ordnance Survey OS grid reference: SD5817 Administration District: Chorley Shire county: Lancashire Region: North West of England Constituent country: England Sovereign state: United Kingdom Other Ceremonial county: Lancashire Historic county: Lancashire Services Police force: Lancashire Constabulary Fire and rescue: Lancashire Fire and Rescue Ambulance: North West... Lancashire is a county in North West England, bounded to the west by the Irish Sea. ... In inorganic chemistry, a sulfate (IUPAC-recommended spelling; also sulphate in British English) is a salt of sulfuric acid. ... General Name, Symbol, Number calcium, Ca, 20 Chemical series alkaline earth metals Group, Period, Block 2, 4, s Appearance silvery white Atomic mass 40. ... A magnified crystal of a salt (halite/sodium chloride) A salt, in chemistry, is any ionic compound composed of cations (positively charged ions) and anions (negative ions) so that the product is neutral (without a net charge). ...

Reactions

Barium carbonate reacts with many acids to soluble barium salts, for example barium chloride: Barium chloride (BaCl2) is a salt of barium and chlorine. ...

BaCO₃(s) + 2 HCl(aq) → BaCl₂(aq) + CO₂(g) + H₂O(l) In jewelry, a solid gold piece is the alternative to gold-filled or gold-plated jewelry. ... The chemical compound hydrochloric acid is the aqueous (water-based) solution of hydrogen chloride (HCl). ... Drinking water This article focuses on water as we experience it every day. ... Barium chloride (BaCl2) is a salt of barium and chlorine. ... Carbon dioxide is a chemical compound composed of one carbon and two oxygen atoms. ... A gas is one of the four major phases of matter (after solid and liquid, and followed by plasma, that subsequently appear as a solid material is subjected to increasingly higher temperatures. ... This article describes water from a scientific and technical perspective. ... A liquid will usually assume the shape of its container. ...

However the reaction with sulfuric acid is poor, because barium sulfate is highly insoluble. Sulfuric acid (British English: sulphuric acid), H2SO4, is a strong mineral acid. ... Granulated Barium Sulfate Barium sulfate (or barium sulphate) is the white crystalline solid with the formula BaSO4. ... It has been suggested that Solid solubility be merged into this article or section. ...

References

1. ^ Whitelaw, G.P. (2003-10-25). Standard Chrome Bath Control (English). finishing.com. Retrieved on 2006-11-29.

2003 (MMIII) was a common year starting on Wednesday of the Gregorian calendar. ... October 25 is the 298th day of the year (299th in leap years) in the Gregorian calendar. ... 2006 (MMVI) is a common year starting on Sunday of the Gregorian calendar. ... November 29 is the 333rd (in leap years the 334th) day of the year in the Gregorian Calendar. ...

External links

• Links to external chemical sources.

This article incorporates text from the Encyclopædia Britannica Eleventh Edition, a publication now in the public domain. Encyclopædia Britannica, the 11th edition The Encyclopædia Britannica Eleventh Edition (1910–1911) is perhaps the most famous edition of the Encyclopædia Britannica. ... The public domain comprises the body of all creative works and other knowledge—writing, artwork, music, science, inventions, and others—in which no person or organization has any proprietary interest. ...