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Calcite

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Big Photo

Elmwood mine, Carthage, Central Tennessee Ba-F-Pb-Zn District, Smith Co., Tennessee, USA
© Rob Lavinsky

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Formula:
CaCO
 
3
System:TrigonalColour:White, Yellow, Red, ...
Lustre:Vitreous, PearlyHardness:3
Member of:Calcite Group
Name:From Calx, the Latin for Lime.
Polymorph of:Aragonite, Vaterite
Isostructural with:Nitratine, Otavite


Calcite Group. Calcite-Rhodochrosite Series.

A very common and widespread mineral with highly variable forms and colours. Calcite is best recognized by its relatively low Mohs hardness (3) and its high reactivity with even weak acids, such as vinegar, plus its prominent cleavage in most varieties.



Visit gemdat.org for gemological information about Calcite. Currently in public beta-test.

Classification of Calcite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:5/B.02-20
Nickel-Strunz 10th (pending) edition ID:5.AB.05

5 : CARBONATES (NITRATES)
A : Carbonates without additional anions, without H2O
B : Alkali-earth (and other M2+) carbonates
Dana 7th edition ID:14.1.1.1
Dana 8th edition ID:14.1.1.1

14 : ANHYDROUS NORMAL CARBONATES
1 : A(XO3)
Hey's CIM Ref.:11.4.1

11 : Carbonates
4 : Carbonates of Ca
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Occurrences of Calcite

Geological Setting:Found in most geologic settings and as a later forming replacement mineral in most other environments in one form or another, it is most common as massive material in limestones and marbles. It forms as chemical sedimentary deposits as limestone, can be regionally or contact metamorphosed into marbles and rarely forms igneous rocks (carbonatites). Also is a common gangue mineral in hydrothermal deposits.

Physical Properties of Calcite

Lustre:Vitreous, Pearly
Diaphaneity (Transparency):Transparent, Translucent
Comment:Pearly on cleavage and {0001}. Can be dull or earthy in chalk variety.
Colour:White, Yellow, Red, Orange, Blue, Green, Brown, Grey etc.
Streak:White
Hardness (Mohs):3
Hardness Data:Mohs hardness reference species
Tenacity:Brittle
Cleavage:Perfect
Perfect on {1011}.
Parting:Readily along twin lamellae {0112} and {0001}.
Fracture:Conchoidal
Density (measured):2.7102(2) g/cm3
Density (calculated):2.711 g/cm3

Crystallography of Calcite

Crystal System:Trigonal
Class (H-M):3m (3 2/m) - Hexagonal Scalenohedral
Space Group:R3c {R3 2/c}
Cell Parameters:a = 4.9896(2) Å, c = 17.061(11) Å
Ratio:a:c = 1 : 3.419
Unit Cell Volume:V 367.85 ų (Calculated from Unit Cell)
Z:6
Morphology:Over 800 different forms have been described. Most commonly as acute rhombohedrons or prismatic with scalenohedral terminations, or combinations of the two.
Twinning:At least four twin laws have been described, the most common being when the twin plane and the composition plane are {0112}. Also common with twinning on {0001} with {0001} as the compositional surface, producing re-entrant angles. Uncommon with {1011} or {0221} as twin planes, producing somewhat heart-shaped crystals ("butterfly" twins).
Crystal Atlas:
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Calcite no.1 - Goldschmidt (1913)
Calcite no.2 - Goldschmidt (1913)
Calcite no.3 - Goldschmidt (1913)
Calcite no.4 - Goldschmidt (1913)
Calcite no.5 - Goldschmidt (1913)
Calcite no.6 - Goldschmidt (1913)
Calcite no.7 - Goldschmidt (1913)
Calcite no.8 - Goldschmidt (1913)
Calcite no.9 - Goldschmidt (1913)
Calcite no.10 - Goldschmidt (1913)
Calcite no.11 - Goldschmidt (1913)
Calcite no.12 - Goldschmidt (1913)
Calcite no.13 - Goldschmidt (1913)
Calcite no.14 - Goldschmidt (1913)
Calcite no.15 - Goldschmidt (1913)
Calcite no.16 - Goldschmidt (1913)
Calcite no.17 - Goldschmidt (1913)
Calcite no.18 - Goldschmidt (1913)
Calcite no.19 - Goldschmidt (1913)
Calcite no.20 - Goldschmidt (1913)
Calcite no.21 - Goldschmidt (1913)
Calcite no.22 - Goldschmidt (1913)
Calcite no.23 - Goldschmidt (1913)
Calcite no.24 - Goldschmidt (1913)
Calcite no.25 - Goldschmidt (1913)
Calcite no.26 - Goldschmidt (1913)
Calcite no.27 - Goldschmidt (1913)
Calcite no.28 - Goldschmidt (1913)
Calcite no.29 - Goldschmidt (1913)
Calcite no.30 - Goldschmidt (1913)
Calcite no.31 - Goldschmidt (1913)
Calcite no.32 - Goldschmidt (1913)
Calcite no.33 - Goldschmidt (1913)
Calcite no.34 - Goldschmidt (1913)
Calcite no.35 - Goldschmidt (1913)
Calcite no.36 - Goldschmidt (1913)
Calcite no.37 - Goldschmidt (1913)
Calcite no.38 - Goldschmidt (1913)
Calcite no.39 - Goldschmidt (1913)
Calcite no.40 - Goldschmidt (1913)
Calcite no.41 - Goldschmidt (1913)
Calcite no.42 - Goldschmidt (1913)
Calcite no.43 - Goldschmidt (1913)
Calcite no.44 - Goldschmidt (1913)
Calcite no.45 - Goldschmidt (1913)
Calcite no.46 - Goldschmidt (1913)
Calcite no.47 - Goldschmidt (1913)
Calcite no.48 - Goldschmidt (1913)
Calcite no.49 - Goldschmidt (1913)
Calcite no.50 - Goldschmidt (1913)
Calcite no.51 - Goldschmidt (1913)
Calcite no.52 - Goldschmidt (1913)
Calcite no.53 - Goldschmidt (1913)
Calcite no.54 - Goldschmidt (1913)
Calcite no.55 - Goldschmidt (1913)
Calcite no.56 - Goldschmidt (1913)
Calcite no.57 - Goldschmidt (1913)
Calcite no.58 - Goldschmidt (1913)
Calcite no.59 - Goldschmidt (1913)
Calcite no.60 - Goldschmidt (1913)
Calcite no.61 - Goldschmidt (1913)
Calcite no.62 - Goldschmidt (1913)
Calcite no.63 - Goldschmidt (1913)
Calcite no.64 - Goldschmidt (1913)
Calcite no.65 - Goldschmidt (1913)
Calcite no.66 - Goldschmidt (1913)
Calcite no.67 - Goldschmidt (1913)
Calcite no.68 - Goldschmidt (1913)
Calcite no.69 - Goldschmidt (1913)
Calcite no.70 - Goldschmidt (1913)
Calcite no.71 - Goldschmidt (1913)
Calcite no.72 - Goldschmidt (1913)
Calcite no.73 - Goldschmidt (1913)
Calcite no.74 - Goldschmidt (1913)
Calcite no.75 - Goldschmidt (1913)
Calcite no.76 - Goldschmidt (1913)
Calcite no.77 - Goldschmidt (1913)
Calcite no.78 - Goldschmidt (1913)
Calcite no.79 - Goldschmidt (1913)
Calcite no.80 - Goldschmidt (1913)
Calcite no.81 - Goldschmidt (1913)
Calcite no.82 - Goldschmidt (1913)
Calcite no.83 - Goldschmidt (1913)
Calcite no.84 - Goldschmidt (1913)
Calcite no.85 - Goldschmidt (1913)
Calcite no.86 - Goldschmidt (1913)
Calcite no.87 - Goldschmidt (1913)
Calcite no.88 - Goldschmidt (1913)
Calcite no.89 - Goldschmidt (1913)
Calcite no.90 - Goldschmidt (1913)
Calcite no.91 - Goldschmidt (1913)
Calcite no.92 - Goldschmidt (1913)
Calcite no.93 - Goldschmidt (1913)
Calcite no.94 - Goldschmidt (1913)
Calcite no.95 - Goldschmidt (1913)
Calcite no.96 - Goldschmidt (1913)
Calcite no.97 - Goldschmidt (1913)
Calcite no.98 - Goldschmidt (1913)
Calcite no.99 - Goldschmidt (1913)
Calcite no.100 - Goldschmidt (1913)
Calcite no.101 - Goldschmidt (1913)
Calcite no.102 - Goldschmidt (1913)
Calcite no.103 - Goldschmidt (1913)
Calcite no.104 - Goldschmidt (1913)
Calcite no.105 - Goldschmidt (1913)
Calcite no.106 - Goldschmidt (1913)
Calcite no.107 - Goldschmidt (1913)
Calcite no.108 - Goldschmidt (1913)
Calcite no.109 - Goldschmidt (1913)
Calcite no.110 - Goldschmidt (1913)
Calcite no.111 - Goldschmidt (1913)
Calcite no.112 - Goldschmidt (1913)
Calcite no.113 - Goldschmidt (1913)
Calcite no.114 - Goldschmidt (1913)
Calcite no.115 - Goldschmidt (1913)
Calcite no.116 - Goldschmidt (1913)
Calcite no.117 - Goldschmidt (1913)
Calcite no.118 - Goldschmidt (1913)
Calcite no.119 - Goldschmidt (1913)
Calcite no.120 - Goldschmidt (1913)
Calcite no.121 - Goldschmidt (1913)
Calcite no.122 - Goldschmidt (1913)
Calcite no.123 - Goldschmidt (1913)
Calcite no.132 - Goldschmidt (1913-1926)
Calcite no.162 - Goldschmidt (1913-1926)
Calcite no.1708 - Goldschmidt (1913)
Calcite no.1709 - Goldschmidt (1913)
Calcite no.1710 - Goldschmidt (1913)
Calcite no.1711 - Goldschmidt (1913)
Calcite no.1712 - Goldschmidt (1913)
Calcite no.1713 - Goldschmidt (1913)
Calcite no.1714 - Goldschmidt (1913)
Calcite no.1715 - Goldschmidt (1913)
Calcite no.1716 - Goldschmidt (1913)
Calcite no.1717 - Goldschmidt (1913)
Calcite no.1718 - Goldschmidt (1913)
Calcite no.1719 - Goldschmidt (1913)
Calcite no.1720 - Goldschmidt (1913)
Calcite no.1721 - Goldschmidt (1913)
Calcite no.1722 - Goldschmidt (1913)
Calcite no.1723 - Goldschmidt (1913)
Calcite no.1724 - Goldschmidt (1913-1926)
Calcite no.2032 - Goldschmidt (1913-1926)
Calcite no.2179 - Goldschmidt (1913-1926)
Calcite no.2266 - Goldschmidt (1913-1926)
Calcite no.2323 - Goldschmidt (1913-1926)
Calcite no.2326 - Goldschmidt (1913-1926)
Calcite no.2342 - Goldschmidt (1913-1926)
Calcite no.2403 - Goldschmidt (1913-1926)
Calcite no.2467 - Goldschmidt (1913-1926)
Calcite no.2481 - Goldschmidt (1913-1926)
Calcite - Contact twin on {012}

About Crystal Atlas

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The mindat.org Crystal Atlas allows you to view a selection of crystal drawings of real and idealised crystal forms for this mineral and, in certain cases, 3d rotating crystal objects. You need Java to see these. You can download Java for free - click here to download Java

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Structure
  Reference
Maslen E N Streltsov V A Streltsova N R (1993) X-ray study of the electron density in calcite, CaCO3. Acta Crystallographica, Section B 49:636-641.

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More Crystal Structures
Click here to view more crystal structures at the American Mineralogist Crystal Structure Database

Epitaxial Relationships of Calcite

Epitaxial Minerals:
Quartz
SiO
 
2
Dolomite
CaMg(CO
 
3
)
 
2
Epitaxi Comments:Often noted overgrowing crystals of other members of the calcite group and of dolomite with the crystal axes oriented in parallel position. Calcite is similarly noted overgrown by these species. Noted in oriented position on quartz, with calcite {0112} parallel to quartz {1011}
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data:
Data courtesy of RRUFF project at University of Arizona, used with permission.
X-Ray Powder Diffraction:
d-spacingIntensity
3.86(10)
3.035(100)
2.495(10)
2.285(20)
1.913(20)
1.875(20)
1.604(10)

Optical Data of Calcite

Type:Uniaxial (-)
RI values: nω = 1.640 - 1.660 nε = 1.486
Maximum Birefringence:δ = 0.154 - 0.174

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Optical Extinction:Symmetrical to cleavage traces.

Chemical Properties of Calcite

Formula:
CaCO
 
3
Essential elements:C, Ca, O
All elements listed in formula:C, Ca, O
CAS Registry number:471-34-1

CAS Registry numbers are published by the American Chemical Society
Common Impurities:Mn,Fe,Zn,Co,Ba,Sr,Pb,Mg,Cu,Al,Ni,V,Cr,Mo

Chemical Analyses of Calcite

Analysis :
1
CaO : 56.037%
CO2 : 43.963%
Totals :100%
Localities :1 -- Ideal Composition

Relationship of Calcite to other Species

Series:Forms a series with Rhodochrosite (see here)
Member of:Calcite Group
Other Members of Group:

- +
Gaspéite
(Ni,Mg,Fe)CO
 
3
Magnesite
MgCO
 
3
Otavite
CdCO
 
3
Rhodochrosite
MnCO
 
3
Siderite
FeCO
 
3
Smithsonite
ZnCO
 
3
Spherocobaltite
CoCO
 
3
Common Associates:
SideriteQuartzPyritePrehniteFluorite
DolomiteBaryte
Related Minerals - Nickel-Strunz Grouping):

- +
5.AB.05Gaspéite
(Ni,Mg,Fe)CO
 
3
5.AB.05Magnesite
MgCO
 
3
5.AB.05Otavite
CdCO
 
3
5.AB.05Rhodochrosite
MnCO
 
3
5.AB.05Siderite
FeCO
 
3
5.AB.05Smithsonite
ZnCO
 
3
5.AB.05Spherocobaltite
CoCO
 
3
5.AB.10Ankerite
Ca(Fe
2+
 
,Mg)(CO
 
3
)
 
2
5.AB.10Dolomite
CaMg(CO
 
3
)
 
2
5.AB.10Kutnohorite
Ca(Mn,Mg,Fe)(CO
 
3
)
 
2
5.AB.10Minrecordite
CaZn(CO
 
3
)
 
2
5.AB.15Aragonite
CaCO
 
3
5.AB.15Cerussite
PbCO
 
3
5.AB.15Strontianite
SrCO
 
3
5.AB.15Witherite
BaCO
 
3
5.AB.20Vaterite
CaCO
 
3
5.AB.25Huntite
CaMg
 
3
(CO
 
3
)
 
4
5.AB.30Norsethite
BaMg(CO
 
3
)
 
2
5.AB.35Alstonite
BaCa(CO
 
3
)
 
2
5.AB.40Olekminskite
Sr(Sr,Ca,Ba)(CO
 
3
)
 
2
5.AB.40Paralstonite
BaCa(CO
 
3
)
 
2
5.AB.45Barytocalcite
BaCa(CO
 
3
)
 
2
5.AB.50Carbocernaite
(Ca,Na)(Sr,Ce,Ba)(CO
 
3
)
 
2
5.AB.55Benstonite
(Ba,Sr)
 
6
(Ca,Mn)
 
6
Mg(CO
 
3
)
 
13
5.AB.60Juangodoyite
Na
 
2
Cu(CO
 
3
)
 
2
Related Minerals - Hey's Index Grouping:

- +
11.4.2Aragonite
CaCO
 
3
11.4.3Vaterite
CaCO
 
3
11.4.4Monohydrocalcite
CaCO
 
3
 · H
 
2
O
11.4.5Ikaite
CaCO
 
3
 · 6H
 
2
O
11.4.6Dolomite
CaMg(CO
 
3
)
 
2
11.4.7Huntite
CaMg
 
3
(CO
 
3
)
 
4
11.4.8Sergeevite
Ca
 
2
Mg
 
11
(CO
 
3
)
 
13
 · 10H
 
2
O
Related Minerals - Dana Grouping):

- +
14.1.1.3Siderite
FeCO
 
3

Other Names for Calcite

Synonyms:
AgyupatAndrodamasCalcareous SparCalc SparDragon Scales
FocoboniteKalchsteinKalsitlaRhomboedrisches KalkhaloidVaterite-A
Other Languages:
Anglo-Saxon:Calcite
Basque:Kaltzita
Belarusian:Кальцый
Bosnian (Latin Script):Kalcit
Bulgarian:Калцит
Catalan:Calcita
Croatian:Kalcit
Czech:Kalcit
Danish:Kalk
Dutch:Calciet
Esperanto:Kalcito
Estonian:Kaltsiit
Finnish:Kalsiitti
French:Chaux carbonatée
Spath Calcaire
Galician:Calcita
German:Calcit
Blätterspat
Kalk
Kalkspat
Kalkspath
Kalkstein
Kalzit
Kanonenspat
Marmelstein
Tafelspat
Greek:χάλζ (Calx)
Hebrew:קלציט
Hungarian:Kalcit
Japanese:方解石
Latin:Calx aerata
Lapis calcarius
Saxum calcis
Latvian:Kalcīts
Lithuanian:Kalcitas
Norwegian (Bokmål):Kalk
Persian:کلسیت
Polish:Kalcyt
Portuguese:Calcita
Romanian:Calcit
Russian:Кальцит
Serbian (Cyrillic Script):Калцит
Simplified Chinese:方解石
Slovak:Kalcit
Spanish:Calcita
Caliza
Espato caliza
Swedish:Kalkspat
Bladspat
Spatig Kalksten
Tamil:கால்சைட்
Turkish:Kalsit
Ukrainian:Кальцит
Vietnamese:Canxit
Varieties:
Angels Wing CalciteAnthraconiteAphrite (of Karsten)ArgentineBaricalcite
BarleycornBruyeriteCalcite Satin SparCapreiteCobaltoan Calcite
Crazy CalciteDog-tooth SparDolomitic CalciteDrewiteFerroan Calcite
GennoishiGlendoniteHematoconiteHislopiteIceland Spar
Kolloid-calciteLimestone OnyxLubliniteManganoan CalciteMexican Jade
Mg-rich CalciteNailhead SparNickeloan CalcitePatagositePelagosite
Plumboan CalcitePoker Chip CalcitePopcorn CalcitePrasochromePrunnerite
PseudogaylussiteSand-CalciteSlate SparStinkkalkStrontian Calcite
TravertineZincian Calcite

Other Information

Fluorescence in UV light:May be fluorescent under LW UV, mid-range UV or SW UV as well as under X-rays, cathode rays and even sunlight, in a number of colors and shades, commonly an intense red under SW with Mn as an activator (such as at Franklin, New Jersey, USA, and Langban in
Special Storage/
Display Requirements from:
Farallon Blanco Mine,..., Burruyacú Department, Tucumán, ArgentinaNo.
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
External LinksSearch for toxicity information at the United States National Library of Medicine
Industrial Uses:Mined extensively for a wide variety of uses ranging from lime (cement) to limestone and marble building stones and aggregates, agricultural supplements and optical calcite.

References for Calcite

Reference List:

- +
Irby (1879) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 3: 610.

Rogers (1901) School of Mines Quarterly: 22: 429.

Schaller, Waldemar Theodore (1909), Some calcite crystals with new forms: Washington Academy of Science Proceedings: 11: 1-16; …Zeitschr. Kristallographie, Band 48: 148-157 (1910).

Whitlock (1910) New York State Museum Mem. 13.

Goldschmidt, V. (1913) Atlas der Krystallformen. 9 volumes, atlas, and text, vol. 2: 5.

Bragg (1914) Proceedings of the Royal Society of London: 89A: 246.

Johnson, Merwin, and Williamson (1916) American Journal of Science: 41: 473.

Wyckoff (1920) American Journal of Science: 50: 317.

Compton et al (1925) Physical Review, a Journal of Experimental and Theoretical Physics: 25: 618.

Krieger (1930) American Mineralogist: 15: 23.

Bearden (1931) Physical Review, a Journal of Experimental and Theoretical Physics: 38: 1389.

Lipson (1943) Nature: 151: 250.

Zeitschr. Kristallographie: 156: 233-243.

Schulman, J.H., et al (1947) The sensitized luminescence of manganese-activated calcite. Journal of Applied Physics: 18: 732-739.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 142-161.

Kerr (1959) Optical Mineralogy 3rd ed. 422pp.

Goldsmith, J.R., D.L. Graf, J. Witters & D.A. Northrop (1962), Studies in the system CaCO3•MgCO3•FeCO3: (1) Phase relations; (2) A method for major element spectrochemical analyses; and (3) Composition of some ferroan dolomites: Journal of Geology: 70: 659-688.

Van der Veen, A.H. (1965) Calcite-dolomite intergrowths in high-temperature carbonate rocks. American Mineralogist: 50: 2070-2077.

Merrill, L. & W.A. Bassett (1972), Crystal structures of the high pressure phases of calcite: EOS: 53: 1121.

Singh, A.K. & G.C. Kennedy (1974), Compression of calcite to 40 kbar: Journal of Geophysical Research: 79: 2615-2622.

Irving, A.J. and Wyllie, P.J. (1975) Subsolidus and melting relationships for calcite, magnesite and the join CaCO3 - MgCO3 to 36 kbar. Geochimica et Cosmochmica Acta: 39: 35-53.

Merrill, L. & W.A. Bassett (1975), The crystal structure of CaCO3 (II), a high pressure metastable phase of calcium carbonate: Acta Crystallographica: B31: 343-349.

Markgraf, S.A., and R.J. Reeder (1985), High-temperature structure refinements of calcite and magnetite: American Mineralogist: 70: 590.

Reviews in Mineralogy, Mineralogical Society of America: 11.

Gaines, Richard V., H. Catherine, W. Skinner, Eugene E. Foord, Brian Mason, Abraham Rosenzweig (1997), Dana's New Mineralogy : The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, 8th. edition: 426.

Smyth, J.R. & T.J. Ahrens, The crystal structure of calcite III: Geophysical Research Letters: 25: 1595-1598.

Mindat.org articles about Calcite

Article entries:
Belgium, Calcite paradiseHarjo Neutkens
Minerals Hunting Trip in ChenZhou area,HuNan province,China in 2006XiaoJun Chen
Calcites mineral trip 2009José Gomes
Calcites from Pedreira do Vidro Quarry, PortugalRui Nunes

Best Localities for Calcite

Best of Species:Calcite

Internet Links for Calcite

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    • Localities for Calcite

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    Locality Updated: Mt Wyatt area, Whitsunday Region, Queensland, AustraliaFrom Steve Sorrell, 19th May 2013 05:43:10