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Calcite

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Herja Mine (Kisbánya), Baia Mare (Nagybánya), Maramures Co., Romania
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Formula:
CaCO
 
3
System:TrigonalColour:White, Yellow, Red, ...
Lustre:Vitreous, PearlyHardness:3
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 hardness (H = 3) and its high reactivity with even weak acids, such as vinegar, plus its prominent cleavage in most varieties.

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:Irregular/Uneven, Step-Like
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}

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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:
QuartzDolomite
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:
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Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data: Peaks:
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)

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)
Related to:
  • Calcite Group
    • 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,Mn
    2+
     
    		)(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,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 SparCarbonate of Lime
    FocoboniteKalchsteinKalsitlaVaterite-A
    Other Languages:
    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:Calcite
    Chaux carbonatée
    Spath Calcaire
    Galician:Calcita
    German:Calcit
    Blätterspat
    Kalk
    Kalkspat
    Kalkspath
    Kalkstein
    Kalzit
    Kanonenspat
    Marmelstein
    Tafelspat
    Greek:χάλζ (Calx)
    Hebrew:קלציט
    Hungarian:Kalcit
    Italian:Calcite
    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
    BarleycornBruyeriteCapreiteCobaltoan CalciteCrazy Calcite
    Dog-tooth SparDolomitic CalciteDrewiteFerroan CalciteHematoconite
    HislopiteIceland SparKolloid-calciteLimestone OnyxLublinite
    Manganoan CalciteMexican JadeMg-rich CalciteNailhead SparPatagosite
    PelagositePlumboan CalcitePoker Chip CalcitePopcorn CalcitePrasochrome
    PrunneritePseudogaylussiteSand-CalciteSatin Spar CalciteSlate Spar
    StinkkalkStrontian CalciteThinoliteZincian 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
    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 Wlliamson (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.

    Articles/Blogs about Calcite

    Internet Links for Calcite

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  • Look for Calcite on Wikipedia
  • Look for Calcite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Calcite in the Natural History Museum (London) online catalogue
  • Calcite details from Handbook of Mineralogy (PDF)
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    Localities for Calcite

    Show Locality List (14671 Items)
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