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Encyclopedia > Tricalcium phosphate


Name Tricalcium phosphate
Chemical formula Ca3(PO4)2
Appearance White amorphous powder

Physical This article or section does not cite any references or sources. ... General Name, Symbol, Number calcium, Ca, 20 Chemical series alkaline earth metals Group, Period, Block 2, 4, s Appearance silvery white Standard atomic weight 40. ... Above is a ball-and-stick model of the inorganic hydrogenphosphate anion (HPO42−). Colour coding: P (orange); O (red); H (white). ... Color is an important part of the visual arts. ...

Formula weight 310.18 g/mol
Melting point Liquifies under high pressure at 1670 K (1391 °C)
Boiling point N/A
Density 3.14 ×103 kg/m3
Solubility 0.002 g in 100g water

Thermochemistry ... The melting point of a crystalline solid is the temperature at which it changes state from solid to liquid. ... The kelvin (symbol: K) is a unit increment of temperature and is one of the seven SI base units. ... Celsius is, or relates to, the Celsius temperature scale (previously known as the centigrade scale). ... 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. ... In physics, density is mass m per unit volume V. For the common case of a homogeneous substance, it is expressed as: where, in SI units: ρ (rho) is the density of the substance, measured in kg·m-3 m is the mass of the substance, measured in kg V is... The U.S. National Prototype Kilogram, which currently serves as the primary standard for measuring mass in the U.S. It was assigned to the United States in 1889 and is periodically recertified and traceable to the primary international standard, The Kilogram, held at the Bureau International des Poids et... The or meter (see spelling differences) is a measure of length. ... Solubility refers to the ability for a given substance, the solute, to dissolve in a solvent. ... BIC pen cap, about 1 gram. ...

ΔfH0liquid -999.8 kJ/mol
ΔfH0solid -982.3 kJ/mol (alpha form)
-984.9 kJ/mol (beta form)
S0solid 57.58 J/(mol·K) (alpha form)
56.4 J/(mol·K) (beta form)

Safety The standard enthalpy of formation or standard heat of formation of a compound is the change of enthalpy that accompanies the formation of 1 mole of a substance in its standard state from its constituent elements in their standard states (the most stable form of the element at 1 atmosphere... The joule (IPA pronunciation: or ) (symbol: J) is the SI unit of energy. ... The mole (symbol: mol) is the SI base unit that measures an amount of substance. ... In chemistry, the standard molar entropy is the entropy content of one mole of substance, under conditions of standard temperature and pressure. ...

Ingestion Causes irritation to the gastrointestinal tract.
Inhalation Causes irritation to the respiratory tract.
Skin May cause skin irritation.
Eyes May cause irritation and damage to the cornea.
More info Hazardous Chemical Database

SI units were used where possible. Unless otherwise stated, standard conditions were used. Disclaimer and references The International System of Units (abbreviated SI from the French phrase, Système International dUnités) is the most widely used system of units. ... Temperature and air pressure can vary from one place to another on the Earth, and can also vary in the same place with time. ... This page refers to the data given in chemical compound property tables. ...

Tricalcium phosphate is a compound with formula Ca3(PO4)2. It is also known as calcium orthophosphate, tertiary calcium phosphate, tribasic calcium phosphate, or "bone ash" (calcium phosphate being one of the main combustion products of bone). A chemical compound is a chemical substance formed from two or more elements, with a fixed ratio determining the composition. ... A combustion reaction taking place in a igniting match Combustion or burning is a complex sequence of exothermic chemical reactions between a fuel and an oxidant accompanied by the production of heat or both heat and light in the form of either a glow or flames. ...

It has an alpha and a beta crystal form, the alpha state being formed at high temperatures. As rock, it is found in Whitlockite. Whitlockite is a mineral, an unusual form of calcium phosphate. ...


Related salts

Dicalcium phosphate CaHPO4 (also calcium monohydrogen phosphate)
Monocalcium phosphate Ca(H2PO4)2 (also calcium dihydrogen phosphate)
Calcium pyrophosphate Ca2P2O7 (occurs as alpha, beta and gamma phases)

Dicalcium phosphate, which is also known as calcium phosphate, dibasic anhydrous and dibasic calcium phosphate, has the chemical formula of CaHPO4 • 2H2O. It is anhyrdrous, and is practically insoluble, with a solubility of 0. ... Calcium dihydrogen phosphate (also called mono-calcium orthophosphate) Ca(H2PO4)2 is a chemical compound. ... Calcium pyrophosphate Ca2P2O7 is a chemical compound that can be formed by the reaction of Pyrophosphoric acid and a calcium base or by strongly heating calcium hydrogen orthophosphate or calcium ammonium orthophosphate. ...

General case

In minerals, "calcium phosphate" refers to minerals containing calcium ions (Ca2+) together with orthophosphates (PO43-), metaphosphates or pyrophosphates (P2O74-) and occasionally hydrogen or hydroxide ions. Minerals are natural compounds formed through geological processes. ...

Especially, the common mineral apatite has formula Ca5(PO4)3X, where X is F, Cl, OH, or a mixture; it is hydroxyapatite if the extra ion is mainly hydroxide. Much of the "tricalcium phosphate" on the market is actually powdered hydroxyapatite. ske| Fracture|| Conchoidal to even Apatite is a group of phosphate minerals, usually referring to hydroxylapatite, fluorapatite, and chlorapatite, named for high concentrations of OH-, F-, or Cl- ions, respectively, in the crystal. ... Fluoride is the ionic form of fluorine. ... The chloride ion is formed when the element chlorine picks up one electron to form an anion (negatively-charged ion) Cl−. The salts of hydrochloric acid HCl contain chloride ions and can also be called chlorides. ... Hydroxide is a polyatomic ion consisting of oxygen and hydrogen: OH− It has a charge of −1. ... Hydroxylapatite is a naturally occurring form of calcium apatite with the formula Ca5(PO4)3(OH), but is usually written Ca10(PO4)6(OH)2 to denote that the crystal unit cell comprises two molecules. ...

Natural occurrence

It is found in nature as a rock in Morocco, Israel, Egypt, and Kola (Russia) and in smaller quantities in some other countries. The natural form is not completely pure, and there are some other components like sand and lime which can change the composition. In terms of P2O5, most calcium phosphate rocks have a content of 30% to 40% P2O5 in weight. Location of Kola south of the Barents Sea. ...

The skeletons and teeth of vertebrate animals are composed of calcium phosphate, mainly hydroxylapatite. Classes and Clades See below Male and female Superb Fairy-wren Vertebrates are members of the subphylum Vertebrata (within the phylum Chordata), specifically, those chordates with backbones or spinal columns. ... Hydroxylapatite is a naturally occurring form of calcium apatite with the formula Ca5(PO4)3(OH), but is usually written Ca10(PO4)6(OH)2 to denote that the crystal unit cell comprises two molecules. ...


Calcium phosphate is an important raw material for the production of phosphoric acid and fertilizers, for example in the Odda process. Phosphoric acid, also known as orthophosphoric acid or phosphoric(V) acid, is an inorganic mineral acid having the chemical formula H3PO4. ... Spreading manure, an organic fertilizer Fertilizers (British English fertilisers) are compounds given to plants to promote growth; they are usually applied either via the soil, for uptake by plant roots, or by foliar feeding, for uptake through leaves. ... The nitrophosphate process (also known as the Odda process) was a method for the industrial production of nitrogen fertilizers invented by Erling Johnson in the city of Odda, Norway around 1927. ...

Calcium phosphate is also a raising agent (food additives) E341. Is a mineral salt found in rocks and bones, it is used in cheese products.

It is also used as a nutritional supplement. There is some debate about the different bioavailabilities of the different calcium salts. In the United States, a dietary supplement is defined under the Dietary Supplement Health and Education Act of 1994 as a product taken by the mouth that contains a dietary ingredient that is intended as a supplement to the diet. ... In pharmacology, bioavailability is used to describe the fraction of an administered dose of unchanged drug that reaches the systemic circulation, one of the principal pharmacokinetic properties of drugs. ...

It is commonly used in porcelain and dental powders, and medically as an antacid or calcium supplement, although calcium carbonate is more common in this regard. A bottle of antacid tablets An antacid is any substance, generally a base, which counteracts stomach acidity. ... Calcium carbonate is a chemical compound, with chemical formula CaCO3. ...

Another practical application of the compound is its use in gene transfection. The calcium ions can make a cell competent (a euphemism for "rip holes in its membrane") to allow exogenous genes to enter the cell by diffusion. A heat shock afterwards then invokes the cell to repair itself. This is a quick and easy method for transfection, albeit a rather inefficient one. Introducing DNA into eukaryotic cells, such as animal cells, is called transfection. ... ... Drawing of the structure of cork as it appeared under the microscope to Robert Hook from Micrographia which is the origin of the word cell. POOP Cells in culture, stained for keratin (red) and DNA (green). ... In microbiology and cell and molecular biology, competence is the ability of a cell to take up extracellular (naked) DNA from its environment. ... This article does not cite any references or sources. ... The cell membrane (also called the plasma membrane or plasmalemma) is a semipermeable lipid bilayer common to all living cells. ... This stylistic schematic diagram shows a gene in relation to the double helix structure of DNA and to a chromosome (right). ... This article or section does not cite any references or sources. ... Heat shock proteins are a part of the cells internal repair mechanism. ... Introducing DNA into eukaryotic cells, such as animal cells, is called transfection. ...



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