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Calcite Group

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Marble quarries, Estremoz, Évora District, Portugal

Show Calcite Group Photos (3)
Formula:
AXO
 
3
Name:After the principal species in the group.


Calcite group structures are taken by nitrates and carbonates of relatively small cations, including Li, Na, Mg, Ca, Fe2+, Zn, Co2+, and Cd.

The structure of calcite and its related species is ionic and resembles that of NaCl, the place of the spherical Cl ions being taken by planar (CO3)2- or (NO3)1- groups. These groups are arranged in parallel position in the crystal with their threefold symmetry axes oriented along [0001]. This arrangement leads the strong birefringence of calcite-group minerals.


Classification of Calcite Group

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Chemical Properties of Calcite Group

Formula:
AXO
 
3

Relationship of Calcite Group to other Species

Minerals in Group:
Calcite:
CaCO
 
3
Gaspéite:
(Ni,Mg,Fe)CO
 
3
Magnesite:
MgCO
 
3
Otavite:
CdCO
 
3
Rhodochrosite:
MnCO
 
3
Siderite:
FeCO
 
3
Smithsonite:
ZnCO
 
3

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Calcite Group

Reference List:Bragg W.L. (1914) Proceedings of the Royal Society, London: 89A: 468.

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: 141-142.

Internet Links for Calcite Group

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    Localities for Calcite Group

    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Peru
     
    • Cuzco Department
      • Espinar Province
    		Chauvet, A., Bailly, L., André, A.-S., Monié, P., Cassard, D., Tajada, F.L., Vargas, J.R., and Tuduri, J. (2006): Internal vein texture and vein evolution of the epithermal Shila-Paula district, southern Peru. Mineralium Deposita 41, 387-410.
    Mineral and/or Locality
    Google
     
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 8th Nov 2009 00:02:17