"कैल्सियम कार्बोनेट": अवतरणों में अंतर
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पंक्ति 1:
{{आधार}}
{{chembox
| Verifiedfields = changed
| Watchedfields = changed
| verifiedrevid = 477003420
| Name = Calcium carbonate
| ImageFileL1 = calcium carbonate.png
| ImageFileR1 = Calcium-carbonate-xtal-3D-SF.png
| ImageFile2 = Calcium carbonate.jpg
| IUPACName = Calcium carbonate
| OtherNames = [[Limestone]]; [[calcite]]; [[aragonite]]; [[chalk]]; [[marble]]; [[pearl]]; [[oyster]]
|Section1={{Chembox Identifiers
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = H0G9379FGK
| ChEMBL_Ref = {{ebicite|changed|EBI}}
| ChEMBL = 1200539
| 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 = Fine white powder; chalky taste
| Odor = odorless
| Density = 2.711 g/cm<sup>3</sup> ([[calcite]])<br/>2.83 g/cm<sup>3</sup> ([[aragonite]])
| Solubility = 0.013 g/L (25 °C)<ref>{{cite book|title=SI Chemical Data Book (4th ed.) |publisher=John Wiley & Sons Australia, Ltd. |author= Aylward, Gordon and Findlay, Tristan |isbn=978-0-470-81638-7|year=2008}}</ref><ref>{{cite book|title=Calcium Carbonate: From the Cretaceous Period Into the 21st Century|publisher=Springer Science & Business Media|year=2001|url=http://books.google.com/books?id=pbkKGa19k5QC&pg=RA1-PR2|author=Rohleder, J. |author2=Kroker, E. |isbn=3-7643-6425-4}}</ref>
| SolubilityProduct = 3.3{{e|-9}}<ref>{{cite book|last =Benjamin|first=Mark M.|year=2002|title=Water Chemistry |publisher=McGraw-Hill|isbn =0-07-238390-9|url=http://books.google.com/?id=67anQgAACAAJ}}</ref>
| Solvent = dilute acids
| SolubleOther = soluble
| MeltingPt = 1,339 °C (2,442 °F; 1,612 K) (calcite) <br> 825 °C (1517 °F; 1,098 K) (aragonite) <ref>{{cite web|url=http://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|accessdate=31 March 2011}}</ref>
| BoilingPt = decomposes
| RefractIndex = 1.59
| pKa = 9.0
| pKb =
}}
|Section3={{Chembox Structure
| CrystalStruct = Trigonal
| SpaceGroup = <span style="text-decoration: overline">3</span>2/m
}}
|Section5={{Chembox Thermochemistry
| DeltaHf = −1207 kJ·mol<sup>−1</sup><ref name=b1>{{cite book| author = Zumdahl, Steven S.|title =Chemical Principles 6th Ed.| publisher = Houghton Mifflin Company| year = 2009| isbn = 0-618-94690-X|page=A21}}</ref>
| Entropy = 93 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 =
| RPhrases =
| SPhrases =
| FlashPtC = 825
| 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 = [[Calcium bicarbonate]]
| OtherCations = [[Magnesium carbonate]]<br/>[[Strontium carbonate]]<br/>[[Barium carbonate]]
| OtherCompounds = [[Calcium sulfate]]
}}
}}
[[File:Calcite.png|thumb|right|Crystal structure of calcite]]
'''कैल्सियम कार्बोनेट''' (Calcium carbonate) एक [[रासायनिक यौगिक]] है जिसका [[रासायनिक सूत्र]] CaCO<sub>3</sub> है। यह संसार के सभी भागों की [[शैल|शैलों]] में पाया जाने वाला आम पदार्थ है। समुद्री जन्तुओं ([[घोंघा]], [[सीपी]], कोलबाल आदि) के कवचों (shells) का यह प्रमुख अवयव है। यह कृषि चूने का सक्रिय घटक है। चिकित्सा के क्षेत्र में यह [[कैल्सियम]] की कमी को दूर करने के लिये तथा अम्लरोधी (antacid) के रूप में प्रयुक्त होता है।
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