Ogled vira Kalcijev karbonat

{{chembox
| Verifiedfields = changed
| Watchedfields = changed
| verifiedrevid = 477003420
| Name = Kalcijev karbonat
| ImageFileL1 = calcium carbonate.png
| ImageFileR1 = Calcium-carbonate-xtal-3D-SF.png
| ImageFile2 = Calcium carbonate.jpg
| IUPACName = Kalcijev karbonat
| OtherNames = [[Aragonit]]; [[kalcit]]; [[kreda]]; [[apnenec]]; [[marmor]]; [[biser]]
|Section1={{Chembox Identifiers
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = H0G9379FGK
| ChEMBL_Ref = {{ebicite|changed|EBI}}
| ChEMBL = 1200539
| DrugBank = DB06724
| KEGG_Ref = {{keggcite|correct|kegg}}
| KEGG = D00932
| InChI = 1/CH2O3.Ca/c2-1(3)4;/h(H2,2,3,4);/q;+2/p-2
| ChEBI_Ref = {{ebicite|correct|EBI}}
| ChEBI = 3311
| SMILES = [Ca+2].[O-]C([O-])=O
| InChIKey = VTYYLEPIZMXCLO-NUQVWONBAS
| SMILES1 = C(=O)([O-])[O-].[Ca+2]
| StdInChI_Ref = {{stdinchicite|correct|chemspider}}
| StdInChI = 1S/CH2O3.Ca/c2-1(3)4;/h(H2,2,3,4);/q;+2/p-2
| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
| StdInChIKey = VTYYLEPIZMXCLO-UHFFFAOYSA-L
| CASNo = 471-34-1
| CASNo_Ref = {{cascite|correct|CAS}}
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
| ChemSpiderID = 9708
| EINECS = 207-439-9
| PubChem = 10112
| RTECS = FF9335000
}}
|Section2={{Chembox Properties
| Formula = CaCO<sub>3</sub>
| MolarMass = 100.0869 g/mol
| Appearance = Fin bel prah praškastega okusa
| Odor = brez duha
| Density = 2.711 g/cm<sup>3</sup> ([[kalcit]])<br />2.83 g/cm<sup>3</sup> ([[aragonit]])
| Solubility = 0.013 g/L (25 °C)<ref>{{navedi knjigo|title=SI Chemical Data Book |edition=4th |publisher=John Wiley & Sons Australia |last1=Aylward |first1=Gordon |last2=Findlay |first2=Tristan |isbn=978-0-470-81638-7|year=2008}}</ref><ref>{{navedi knjigo|title=Calcium Carbonate: From the Cretaceous Period Into the 21st Century|publisher=Springer Science & Business Media|year=2001|url=https://books.google.com/books?id=pbkKGa19k5QC&pg=RA1-PR2|last1=Rohleder |first1=J. |last2=Kroker |first2=E. |isbn=978-3-7643-6425-0}}</ref>
| SolubilityProduct = {{val|3.3e-9}}<ref>{{navedi knjigo|last =Benjamin|first=Mark M.|year=2002|title=Water Chemistry |publisher=McGraw-Hill|isbn =978-0-07-238390-4|url=https://books.google.com/books?id=67anQgAACAAJ}}</ref>
| Solvent = tekoče kisline
| SolubleOther = topljiv
| MeltingPtC = 1339
| MeltingPt_notes = (kalcit) <br> {{cvt|825|°C|°F K}} (aragonit)<ref>{{navedi splet|url=https://www.cdc.gov/niosh/docs/81-123/pdfs/0090.pdf|title=Occupational safety and health guideline for calcium carbonate|publisher=US Dept. of Health and Human Services|access-date=31 March 2011}}</ref><ref>{{navedi splet |url=http://diyhpl.us/~nmz787/mems/unorganized/CRC%20Handbook%20of%20Chemistry%20and%20Physics%2085th%20edition.pdf |title=Archived copy |access-date=29 October 2018 |archive-url=https://web.archive.org/web/20181029195852/http://diyhpl.us/~nmz787/mems/unorganized/CRC%20Handbook%20of%20Chemistry%20and%20Physics%2085th%20edition.pdf |archive-date=29 October 2018 |url-status=dead }}</ref>
| BoilingPt = [[Chemical decomposition|decomposes]]
| RefractIndex = 1.59
| pKa = 9.0
| pKb =
| MagSus = {{val|-3.82e-5|u=cm<sup>3</sup>/mol}}
}}
|Section3={{Chembox Structure
| CrystalStruct = Trigonalni
| SpaceGroup = <span style="text-decoration: overline">3</span>2/m
}}
|Section5={{Chembox Thermochemistry
| DeltaHf = −1207&nbsp;kJ·mol<sup>−1</sup><ref name=b1>{{navedi knjigo| author = Zumdahl, Steven S.|title =Chemical Principles 6th Ed| url = https://archive.org/details/chemicalprincipl0000zumd_u9g0| publisher = Houghton Mifflin Company| year = 2009| isbn = 978-0-618-94690-7|page=A21}}</ref>
| Entropy = 93&nbsp;J·mol<sup>−1</sup>·K<sup>−1</sup><ref name=b1 />
 }}
|Section6={{Chembox Pharmacology
| ATCCode_prefix = A02
| ATCCode_suffix = AC01
| ATC_Supplemental = {{ATC|A12|AA04}}
}}
|Section7={{Chembox Hazards
| ExternalSDS = [http://www.inchem.org/documents/icsc/icsc/eics1193.htm ICSC 1193]
| MainHazards =
| NFPA-H = 0
| NFPA-F = 0
| NFPA-R = 0
| NFPA-S =
| LD50 = 6450 mg/kg (oral, rat)
| PEL = TWA 15 mg/m<sup>3</sup> (total) TWA 5 mg/m<sup>3</sup> (resp)<ref>{{PGCH|0090}}</ref>
}}
|Section8={{Chembox Related
| OtherAnions = [[kalcijev bikarbonat]]
| OtherCations = [[berilijev karbonat]]<br/>[[magnezijev karbonat]]<br/>[[stroncijev karbonat]]<br/>[[barijev karbonat]]<br/>[[radijev karbonat]]
| OtherCompounds = [[kalcijev sulfat]]
}}
}}

'''Kalcijev karbonat''' je [[kemična spojina]] s [[kemična formula|formulo]] [[kalcij|Ca]][[ogljik|C]][[kisik|O]]<sub>3</sub>.

Na Zemlji je zelo pogosta snov in ga v obliki apnenca najdemo na vseh koncih sveta. Je glavni gradnik lupin morskih školjk in polžev, iz katerih so apnenčaste gore tudi nastale.

== Nekatere kemične reakcije ==
* CaCO<sub>3</sub> → CaO + CO<sub>2</sub>
* Ca(OH)<sub>2</sub> + CO<sub>2</sub> → CaCO<sub>3</sub> + H<sub>2</sub>O
* CaCO<sub>3</sub> + CO<sub>2</sub> + H<sub>2</sub>O → Ca(HCO<sub>3</sub>)<sub>2</sub>
* Ca(HCO<sub>3</sub>)<sub>2</sub> → CaCO<sub>3</sub> + CO<sub>2</sub> + H<sub>2</sub>O

== Mineralne oblike ==
Kot samostojno [[kamnina|kamnino]] oz. [[mineral]] ga najdemo v naslednjih oblikah:
* [[aragonit]]
* [[kalcit]] - po staro imenovan ''dvolomec''
* [[kreda (mineral)|kreda]]
* [[apnenec]]
* [[marmor]]
* [[travertin]]
* [[vaterit]]

V kombinaciji z drugimi kamninami pa:
* [[dolomit]]

==Sklici==
{{sklici}}

== Zunanje povezave ==
{{Wikislovar|kalcijev karbonat|Kalcijev karbonat}}
{{chem-stub}}
{{normativna kontrola}}

[[Kategorija:Kemične spojine]]