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Aragonite

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Christandl quarry, Peunt, Naintschgraben, Anger, Weiz, Styria, Austria
© ReMi

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Formula:
CaCO
 
3
System:OrthorhombicColour:Colorless to white or ...
Lustre:Vitreous, ResinousHardness:3½ - 4
Name:Named in 1797 for the type locality, Molina de Aragón, Spain.
Polymorph of:Calcite, Vaterite


Aragonite Group

The principal member of the Aragonite Group, aragonite is the second most common polymorph of natural calcium carbonate (the most common is calcite). It is significantly less widespread and abundant than calcite and is formed under a much narrower range of physio-chemical conditions. It is metastable relative to calcite and often converts to calcite accompanying changes in environment. It is always a low-temperature, near surface mineral.

Classification of Aragonite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:5/B.04-10
Nickel-Strunz 10th (pending) edition ID:5.AB.15

5 : CARBONATES (NITRATES)
A : Carbonates without additional anions, without H2O
B : Alkali-earth (and other M2+) carbonates
Dana 7th edition ID:14.1.3.1
Hey's CIM Ref.:11.4.2

11 : Carbonates
4 : Carbonates of Ca
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Type Occurrence of Aragonite

Type Locality:Gallo river, Molina de Aragón, Guadalajara, Castile-La Mancha, Spain
Year of Discovery:1797

Occurrences of Aragonite

Geological Setting:As speleothems in limestone caves; as pisolites, sinters and massive lamellar deposits at geysers and hot springs; as seafloor oolites; with siderite in iron deposits; with calcite and dolomite and other magnesium minerals in altered serpentinites, dunites and peridotites; and as a replacement mineral in various rock types and ore deposits, formed from low-temperature and pressure aqueous solutions.

Physical Properties of Aragonite

Lustre:Vitreous, Resinous
Diaphaneity (Transparency):Transparent, Translucent
Colour:Colorless to white or grey, often stained various hues by impurities, such as blue, green, red or violet; colourless in transmitted light.
Streak:Uncolored/white.
Hardness (Mohs):3½ - 4
Hardness Data:Measured
Tenacity:Brittle
Cleavage:Distinct/Good
On {010} distinct; On {110} and {011} very indistinct.
Fracture:Sub-Conchoidal
Density (measured):2.947 g/cm3
Density (calculated):2.944 g/cm3

Crystallography of Aragonite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:a = 4.95Å, b = 7.96Å, c = 5.74Å
Ratio:a:b:c = 0.622 : 1 : 0.721
Unit Cell Volume:V 226.17 ų (Calculated from Unit Cell)
Z:4
Morphology:Short to long prismatic [100], sometimes flattened {010}; acicular, often with steep pyramidal or domatic terminations; or tabular {001}; also stalactic, columnar, in stellate or radiating aggregates, and fibrous crusts of tiny acicular crystals.
Twinning:Single crystals are typically twinned cyclically on {110} producing pseudo-hexagonal aggregates of contact and penetration twins. Polysynthetic twinning produces lamellae or fine striations parallel to [100].
Crystal Atlas:
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Aragonite no.1 - Goldschmidt (1913-1926)
Aragonite no.5 - Goldschmidt (1913-1926)
Aragonite no.36 - Goldschmidt (1913-1926)
Aragonite no.37 - Goldschmidt (1913-1926)
Aragonite no.55 - Goldschmidt (1913-1926)
Aragonite no.109 - Goldschmidt (1913-1926)
Aragonite no.112 - Goldschmidt (1913-1926)
Aragonite no.197 - Goldschmidt (1913-1926)
Aragonite no.238 - Goldschmidt (1913-1926)

About Crystal Atlas

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Structure
  Reference
Dal Negro A Ungaretti L (1971) Refinement of the crystal structure of aragonite. American Mineralogist 56:768-772.

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More Crystal Structures
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Epitaxi Comments:Mutual orientation in certain calcite pseudomorphs after aragonite. Also in aragonite pseudomorphs after gypsum, with aragonite {010}[001] parallel to the gypsum {010}[001].
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
3.40(100)
3.27(50)
2.70(60)
2.48(40)
2.37(50)
2.34(30)
2.33(30)

Optical Data of Aragonite

Type:Biaxial (-)
RI values: nα = 1.529 - 1.530 nβ = 1.680 - 1.682 nγ = 1.685 - 1.686
2V:Measured: 18° to 19°, Calculated: 16° to 18°
Maximum Birefringence:δ = 0.156

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:weak

Chemical Properties of Aragonite

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:Sr,Pb,Zn

Relationship of Aragonite to other Species

Related to:
  • Aragonite Group
    • Common Associates:
    SulphurSmithsoniteSideriteMalachiteLimonite
    HydromagnesiteGypsumDolomiteClayCerussite
    CelestineCalciteBrucite
    Related Minerals - Nickel-Strunz Grouping):

    - +
    5.AB.05Calcite
    CaCO
     
    3
    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.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:

    - +
    11.4.1Calcite
    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

    Other Names for Aragonite

    Synonyms:
    ArragoniteArragon SparChimboraziteConchiteCtypeite
    IgliteIgloiteKtypéiteOserskiteWinnieite
    Other Languages:
    Aragonese:Aragonito
    Bosnian (Latin Script):Aragonit
    Bulgarian:Арагонит
    Catalan:Aragonita
    Dutch:Aragoniet
    Esperanto:Aragonito
    Estonian:Aragoniit
    Finnish:Aragoniitti
    French:Aragonite
    Galician:Aragonita
    German:Aragonit
    Arragonischer Apatit
    Arragonischer Kalkspath
    Arragonit
    Chimborazit
    Conchit
    Excentrischer Kalkstein
    Iglit
    Igloit
    Ktypéit
    Nadelstein
    Oserskit
    Schallenkalk
    Sprudelstein
    Winnieit
    Hebrew:ארגוניט
    Hungarian:Aragonit
    Italian:Aragonite
    Japanese:アラレ石
    霰石
    Latin:Aragonite
    Marmoreus ramulosus
    Spathum prismaticum in igne lucem spargens
    Lithuanian:Aragonitas
    Low Saxon:Aragonit
    Polish:Aragonit
    Portuguese:Aragonita
    Romanian:Aragonit
    Russian:Арагонит
    Serbian (Cyrillic Script):Арагонит
    Simplified Chinese:霰石
    Slovak:Aragonit
    Spanish:Aragonito
    Arragonita
    Chimborazita
    Conchita
    Iglita
    Igloita
    Ktypéita
    Oserskita
    Winnieita
    Tamil:அரகோனைட்
    Ukrainian:Арагоніт
    Vietnamese:Aragonit
    Varieties:
    Flos FerriPlumboan AragoniteStrontian AragoniteZincian Aragonite

    Other Information

    Fluorescence in UV light:Pale rose, yellow, white or bluish, with greenish or white phosphorescence (LW UV); yellowish (SW UV).
    Thermal Behaviour:Begins to convert to calcite at about 400° when heated in dry air.

    Thermoluminescent.
    Other Information:Readily soluble in dilute acids with effervescence.
    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

    References for Aragonite

    Reference List:Davila, M. (1767) Catalogue syst. et raisonné des curiosités de la nature et de l’art qui composent de cabinet de M. Davila. 3 volumes, Paris: 2: 50, 52.

    Linnaeus (1768) Systema Naturae of Linnaeus: 183 (as Stalactites Flos ferri; Marmoreus ramulosus).

    Klaproth (1788) Bergmaaennusches Journal, Freiberg (Neues Bergmannische Journal): 1: 299.

    Klaproth (1788) Crell’s Chemical Journal, London: 1: 387 (as carbonate of lime).

    Werner (1788) Bergmaaennusches Journal, Freiberg (Neues Bergmannische Journal): 1: 95 (as Arragonischer Apatit).

    Born, I. von (1790) Catalogue méthodique et raisonné de la collection des fossils de Mlle. Eleonore de Raab. 4 volumes, Vienna: 2: 320.

    Werner (1790) Bergmaaennusches Journal, Freiberg (Neues Bergmannische Journal): 2: 74 (as Arragonischer Kalkspath.

    Gmelin (1793) Linnaei Syst. Nat., 13th edition: 3: 92.

    Kirwan, R. (1794) Elements of Mineralogy. (1784), second edition, London: 1: 87 (as Arragon Spar).

    Esmark (1798) Bergmaaennusches Journal, Freiberg (Neues Bergmannische Journal): 3: 99.

    Karsten, D.L.G. (1800) Mineralogische Tabellen, Berlin. First edition: 34, 74 (as Excentrischer Kalkstein)

    Haüy, R.J. (1801) Traité de minéralogie. First edition: in 4 volumes with atlas in fol. Paris: vol. 2.

    Emmerling, L.. (1802) Lehrbuch der Mineralogie, 2nd. Edition, Giessen: 2: 684 (as Arragonit).

    Stromeyer (1813) Annalen der Physik, Halle, Leipzig.

    Clarke (1821) Annals of Philosophy, London: 2: 57, 147 (as Chimborazite).

    Rose (1853) Annalen der Physik, Halle, Leipzig: 91: 147.

    Sénarmont (1854) Annales de chimie et de physique, Paris: 41[3]: 61.

    Leydolt (1856) Konigliche Akademie der Wissenschaften, Vienna, Sitzber.: 19: 10.

    Rose (1856) Akademie der Wissenschaften, Berlin, Abh.: 64, 66.

    Rose (1856) Annalen der Physik, Halle, Leipzig: 97: 161.

    Luca (1858) Nuovo Cimento, Pisa: 7: 453.

    Scharff (1861) Neues Jahrbuch für Mineralogie, Geologie und Paleontologie, Heidelberg, Stuttgart: 31.

    Forbes (1862) Quart. J. Geol. Soc.: 17: 45

    Breithaupt (1865) Berg.- und hüttenmännisches Zeitung, Freiberg, Leipzig (merged into Glückauf): 24: 319.

    Sandberger (1866) Annalen der Physik, Halle, Leipzig: 129: 472.

    Koksharov, N. von (1870) Materialien zur Mineralogie Russlands. 11 volumes with atlas: vol. 6: 261.

    Schrauf (1870) Konigliche Akademie der Wissenschaften, Vienna, Sitzber.: 62[2]: 734.

    Roepper analysis in: Genth (1875) Second Geological Survey, Pennsylvania, Report: 163.

    Geinitz (1876) Neues Jahrbuch für Mineralogie, Geologie und Paleontologie, Heidelberg, Stuttgart: 449.

    Lasaulx (1879) Neues Jahrbuch für Mineralogie, Geologie und Paleontologie, Heidelberg, Stuttgart: 505.

    Domeyko (1881) Annales des mines: 18[7]: 531.

    Kalkowsky (1884) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 9: 497.

    Traube (1884) Inaugural Dissertation, Greifswald.

    Bauer (1886) Neues Jahrbuch für Mineralogie, Geologie und Paleontologie, Heidelberg, Stuttgart: I: 72, 79.

    Beckenkamp (1888) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 14: 375.

    Mülheim (1888) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 14: 229.

    Traube (1889) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 15: 410.

    Bauer (1890) Neues Jahrbuch für Mineralogie, Geologie und Paleontologie, Heidelberg, Stuttgart: I: 12.

    Offret (1890) Bulletin de la Société française de Minéralogie: 13: 582.

    Lemberg (1892) Zeitschrift der Deutsche geologische Gesellschaft, Berlin: 44: 232.

    Jeremejev (1897) Bulletin de Académy imperial de sciences, St. Pétersburg: 7, no. 1.

    Keilhack (1898) Zeitschrift der Deutsche geologische Gesellschaft, Berlin: 50: 131.

    Lacroix (1898) Comptes rendu de l’Académie des sciences de Paris: 126: 602.

    Vater (1899) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 31: 575.

    Beckenkamp (1900) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 32: 25.

    Brauns (1901) Centralblatt für Mineralogie, Geologie und Paleontologie, Stuttgart: 134.

    Meigen (1901) Centralblatt für Mineralogie, Geologie und Paleontologie, Stuttgart: 577.

    Mügge (1901) Jb. Min., Beil.-Bd.: 14: 246.

    Wyrouboff (1901) Bulletin de la Société française de Minéralogie: 24: 371.

    Panebianco (1902) Rivista di mineralogia e cristallografia italiana, Padua: 28: 5.

    Vater (1902) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 35: 149.

    Mügge (1903) Jb. Min., Beil.-Bd.: 16: 379.

    Lacroix, A. (1909): 3: 670.

    Thugutt (1910) Centralblatt für Mineralogie, Geologie und Paleontologie, Stuttgart: 786.

    Wetzel (1910) Neues Jahrbuch für Mineralogie, Geologie und Paleontologie, Heidelberg, Stuttgart: II: 70.

    Doelter, C. (1911) Handbuch der Mineral-chemie (in 4 volumes divided into parts): 1: 337.

    Butler (1913) Economic Geology: 8: 8 (Zn-aragonite).

    Goldschmidt, V. (1913) Atlas der Krystallformen. 9 volumes, atlas, and text: vol. 1: 90.

    Quercigh (1915) Reale accademia nazionale dei Lincei, Rome, Rend.: 24[5]: 1231.

    Watanabe (1915) Beiträge zur Mineralogie von Japan, Tokyo: no. 5: 237.

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

    Schäfer and Schubert (1916) Annalen der Physik, Halle, Leipzig: 50: 283.

    Barca (1919) Mus. Nac. Cien. Nat. Trab. Madrid, Ser. Geol., no. 24.

    Buttenbach (1919) Ann. Soc. geol.. Belgique: 42: 93.

    Krüger (1922) Ak. Leipzig, Sitzber.: 74: 253.

    Stevanović (1922) Ann. géol. pénin. Balkan: 7: 85 [Min. Abs. (1923): 2: 116].

    Veit (1922) Jb. Min., Beil.-Bd.: 45: 121.

    Bragg (1924) Proceedings of the Royal Society of London: 105: 16; 105A: 370.

    Tomkeieff (1925) Mineralogical Magazne: 20: 408.

    Wyckoff (1925) American Journal of Science: 9: 145.

    Hintze, Carl (1926) Handbuch der Mineralogie. Berlin and Leipzig. 6 volumes: 1[3A]: 2974, 3019.

    Shannon (1926) U.S. National Museum Bull. 131: 237.

    Vendl (1926) Hist. Nat. Mus. Natl. Hung.: 24: 223.

    Yamaguchi (1927) Journal of the Geological Society of Tokyo: 34: 159.

    Voigt, Woldemar (1928) Lehrbuch der Kristallphysik. 978 pp., Leipzig.

    O'Daniel (1930) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 74: 333.

    Köhler (1931) Chemie Erde: 6: 257.

    Obenauer (1931) Jahrbuch Min., Beil.-Bd.: 64: 437.

    Reichert (1932) Földtani Közlöny, Budapest (Magyarhone Földtani Torsulat): 62: 196.

    Shoji (1932) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 84: 74.

    Köhler and Leitmeier (1934) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 87: 146.

    Kôzu and Kani (1934) Proceedings of the Imperial Academy, Tokyo: 10: 222.

    Krejci-Graff (1934) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 88: 260.

    Leitmeier and Feigl (1934) Mineralogische und petrographische Mitteilungen, Vienna: 45: 447.

    Gagarin (1936) Ann. géol. pénin. Balkan: 13: 72.

    Heritsch (1936) Zentralblatt Mineralien: 33.

    Hutton (1936) Transactions of the Royal Society of New Zealand: 66: 35.

    Siegl (1936) Mineralogische und petrographische Mitteilungen, Vienna: 48: 286.

    Rottenbach (1937) Inaugural Dissertation, Bonn.

    Tokody (1937) Hist. Nat. Mus. Natl. Hung.: 31: 171.

    Chudoba and Rottenbach (1938) Zentralblatt Mineralien: 261.

    Seifert (1938) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 100: 120.

    Alexander (1940) American Journal of Science: 238: 366.

    Haberlandt (1940) Chemie der Erde, Jena: 13: 212.

    Kleber (1940) Neues Jahrbuch für Mineralogie, Geologie und Paleontologie, Beil.-Bd., Heidelberg, Stuttgart: 75: 465.

    Alexander (1941) Gemmologist: 10: 93.

    Alexander (1941) Science: 93: 110.

    Yugovics (1941) Földtani Közlöny, Budapest (Magyarhone Földtani Torsulat): 71: 23.

    Andrew and Schaller (1942) American Mineralogist: 27: 135.

    Melmore (1942) Nature: 150: 382.

    Bray (1945) Journal of the Royal Society of new South Wales: 78: 113.

    Hugi (1945) Schweizerische mineralogische und petrographische Mitteilungen, Frauenfeld: 25: 114.

    Zavaritzky (1948) Doklady of the Academy of Sciences of the USSR, Earth Science Sections: 63: 725.

    Faust (1950) American Mineralogist: 35: 207.

    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: 182-193.

    American Mineralogist (1971): 56: 758-772.

    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: 442.

    Reviews in Mineralogy, Mineralogical Society of America: 11.

    Internet Links for Aragonite

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  • Raman and XRD data at RRUFF project
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  • Aragonite details from Handbook of Mineralogy (PDF)
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    Localities for Aragonite

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