Fine white powder or colorless crystals; chalky taste
Odor
odorless
Density
2.711 g/cm3 (calcite) 2.83 g/cm3 (aragonite)
Melting point
1,339 °C (2,442 °F; 1,612 K) (calcite) 825 °C (1,517 °F; 1,098 K) (aragonite)[4][5]
Boiling point
decomposes
Solubility in water
0.013 g/L (25 °C)[1][2]
Solubility product (Ksp)
3.3×10−9[3]
Solubility in dilute acids
soluble
Acidity (pKa)
9.0
Magnetic susceptibility (χ)
−3.82×10−5 cm3/mol
Refractive index (nD)
1.59
Structure
Crystal structure
Trigonal
Space group
32/m
Thermochemistry
Std molar entropy (S⦵298)
93 J/(mol·K)[6]
Std enthalpy of formation (ΔfH⦵298)
−1207 kJ/mol[6]
Pharmacology
ATC code
A02AC01 (WHO) A12AA04 (WHO)
Hazards
NFPA 704 (fire diamond)
0
0
0
Lethal dose or concentration (LD, LC):
LD50 (median dose)
6450 mg/kg (oral, rat)
NIOSH (US health exposure limits):
PEL (Permissible)
TWA 15 mg/m3 (total) TWA 5 mg/m3 (resp)[7]
Safety data sheet (SDS)
ICSC 1193
Related compounds
Other anions
Calcium bicarbonate
Other cations
Beryllium carbonate
Magnesium carbonate
Strontium carbonate
Barium carbonate
Radium carbonate
Zinc carbonate
Cadmium carbonate
Lead(II) carbonate
Related compounds
Calcium sulfate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Nverify (what is YN ?)
Infobox references
Chemical compound
Calcium carbonate is a chemical compound with the chemical formula CaCO3. It is a common substance found in rocks as the minerals calcite and aragonite, most notably in chalk and limestone, eggshells, gastropod shells, shellfish skeletons and pearls. Materials containing much calcium carbonate or resembling it are described as calcareous. Calcium carbonate is the active ingredient in agricultural lime and is produced when calcium ions in hard water react with carbonate ions to form limescale. It has medical use as a calcium supplement or as an antacid, but excessive consumption can be hazardous and cause hypercalcemia and digestive issues.[8]
^Aylward, Gordon; Findlay, Tristan (2008). SI Chemical Data Book (4th ed.). John Wiley & Sons Australia. ISBN 978-0-470-81638-7.
^Rohleder, J.; Kroker, E. (2001). Calcium Carbonate: From the Cretaceous Period Into the 21st Century. Springer Science & Business Media. ISBN 978-3-7643-6425-0.
^Benjamin, Mark M. (2002). Water Chemistry. McGraw-Hill. ISBN 978-0-07-238390-4.
^"Occupational safety and health guideline for calcium carbonate" (PDF). US Dept. of Health and Human Services. Archived (PDF) from the original on 30 April 2011. Retrieved 31 March 2011.
^"Archived copy" (PDF). Archived from the original (PDF) on 29 October 2018. Retrieved 29 October 2018.{{cite web}}: CS1 maint: archived copy as title (link)
^ abZumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A21. ISBN 978-0-618-94690-7.
^NIOSH Pocket Guide to Chemical Hazards. "#0090". National Institute for Occupational Safety and Health (NIOSH).
^Strumińska-Parulska, DI (2015). "Determination of 210Po in calcium supplements and the possible related dose assessment to the consumers". Journal of Environmental Radioactivity. 150: 121–125. doi:10.1016/j.jenvrad.2015.08.006. PMID 26318774.
Calciumcarbonate is a chemical compound with the chemical formula CaCO3. It is a common substance found in rocks as the minerals calcite and aragonite...
mixtures of sodium carbonate, calciumcarbonate, and silica sand (silicon dioxide (SiO2)). When these materials are heated, the carbonates release carbon...
compound; it exists only in aqueous solution containing calcium (Ca2+), bicarbonate (HCO− 3), and carbonate (CO2− 3) ions, together with dissolved carbon dioxide...
of calcium include calcium chloride and calcium gluconate. The forms that are taken by mouth include calcium acetate, calciumcarbonate, calcium citrate...
dolomite, a calcium-magnesium carbonate CaMg(CO3)2; and siderite, or iron(II) carbonate, FeCO3, an important iron ore. Sodium carbonate ("soda" or "natron")...
abundant metal, after iron and aluminium. The most common calcium compound on Earth is calciumcarbonate, found in limestone and the fossilised remnants of early...
of limestone, chalk or gypsum, which are largely made up of calcium and magnesium carbonates, bicarbonates and sulfates. Drinking hard water may have moderate...
Limestone (calciumcarbonate CaCO3) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the...
Limescale is a hard, chalky deposit, consisting mainly of calciumcarbonate (CaCO3). It often builds up inside kettles, boilers, and pipework, especially...
rusty varieties. It is formed by a process of rapid precipitation of calciumcarbonate, often at the mouth of a hot spring or in a limestone cave. In the...
(/kælˈkɛəriəs/) is an adjective meaning "mostly or partly composed of calciumcarbonate", in other words, containing lime or being chalky. The term is used...
primary active component is calciumcarbonate. Additional chemicals vary depending on the mineral source and may include calcium oxide. Unlike the types of...
well as the cycling of calciumcarbonate (CaCO3) formed into shells by certain organisms such as plankton and mollusks (carbonate pump). Budget calculations...
The carbonate compensation depth (CCD) is the depth, in the oceans, at which the rate of supply of calciumcarbonates matches the rate of solvation. That...
now may use mineral chalk, other mineral sources of calciumcarbonate, or the mineral gypsum (calcium sulfate). While gypsum-based blackboard chalk is the...
Marine biogenic calcification is the production of calciumcarbonate by organisms in the global ocean. Marine biogenic calcification is the biologically...
stomach acid.[better source needed] Calciumcarbonate is harder to digest than calcium citrate, and calciumcarbonate carries a risk of "acid rebound" (the...
Amorphous calciumcarbonate (ACC) is the amorphous and least stable polymorph of calciumcarbonate. ACC is extremely unstable under normal conditions and...
soils. Calcium ions are consumed and removed from aqueous environments as they react to form insoluble structures such as calciumcarbonate and calcium silicate...
broadly used term lime connotes calcium-containing inorganic compounds, in which carbonates, oxides, and hydroxides of calcium, silicon, magnesium, aluminium...
Calcite is a carbonate mineral and the most stable polymorph of calciumcarbonate (CaCO3). It is a very common mineral, particularly as a component of...
the most common carbonate rock and is a sedimentary rock made of calciumcarbonate with two main polymorphs: calcite and aragonite. While the chemical...
sink in the carbon cycle. Some plants like Chara utilize carbonate and produce calciumcarbonate (CaCO3) as result of biological metabolism. In freshwater...
(°dKH) (from the German "Karbonathärte"), or in parts per million calciumcarbonate ( ppm CaCO 3 or grams CaCO 3 per litre|mg/L). One dKH is equal to...
habitats. Calcareous sponges, which have calciumcarbonate spicules and, in some species, calciumcarbonate exoskeletons, are restricted to relatively...
pregnancy and breastfeeding. Calcium gluconate is made by mixing gluconic acid with calciumcarbonate or calcium hydroxide. Calcium gluconate came into medical...
conulariids. Just like the shell of a mollusk, a pearl is composed of calciumcarbonate (mainly aragonite or a mixture of aragonite and calcite) in minute...
24497 - Calcium Sulfate". PubChem. Titus, Harry W.; McNally, Edmund; Hilberg, Frank C. (1933-01-01). "Effect of CalciumCarbonate and Calcium Sulphate...