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Callaghanite

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Formula:
Cu
 
2
Mg
 
2
(CO
 
3
)(OH)
 
6
· 2H
 
2
O
System:MonoclinicHardness:3 - 3½
Name:Named in honor of Dr. Eugene Callaghan (1904–1990), Director of the New Mexico Bureau of Mines, Socorro, New Mexico, USA, for his work on magnesite deposits. The mineral both contains magnesium and has a type locality in a magnesium deposit.
This page provides mineralogical data about Callaghanite.

Classification of Callaghanite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:5/E.07-10
Nickel-Strunz 10th (pending) edition ID:5.DA.25

5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
A : With medium-sized cations
Dana 8th edition ID:16b.5.1.1

16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
5 : AmBn(XO3)pZqxH2O & with (m+n):p = 4:1
Hey's CIM Ref.:11.2.5

11 : Carbonates
2 : Carbonates of Cu
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Type Occurrence of Callaghanite

Type Locality:Premier Chemicals Mine (Gabbs Magnesite-Brucite Mine; Basic Refractories Mine; Basic Mine), Gabbs District, Nye Co., Nevada, USA
Year of Discovery:1954

Physical Properties of Callaghanite

Hardness (Mohs):3 - 3½

Crystallography of Callaghanite

Crystal System:Monoclinic
Cell Parameters:a = 8.24Å, b = 11.8Å, c = 10.06Å
β = 107.3°
Ratio:a:b:c = 0.698 : 1 : 0.853
Unit Cell Volume:V 933.90 ų (Calculated from Unit Cell)

Optical Data of Callaghanite

Type:Biaxial (-)
RI values: nα = 1.559 nβ = 1.653 nγ = 1.680
2V:Measured: 55° , Calculated: 52°
Maximum Birefringence:δ = 0.121

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r < v moderate

Chemical Properties of Callaghanite

Formula:
Cu
 
2
Mg
 
2
(CO
 
3
)(OH)
 
6
· 2H
 
2
O
Simplified for copy/paste:Cu2Mg2(CO3)(OH)6·2H2O
Essential elements:C, Cu, H, Mg, O
All elements listed in formula:C, Cu, H, Mg, O

Relationship of Callaghanite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
5.DA.05Dypingite
Mg
 
5
(CO
 
3
)
 
4
(OH)
 
2
· 5H
 
2
O
5.DA.05Giorgiosite
Mg
 
5
(CO
 
3
)
 
4
(OH)
 
2
· 5-6H
 
2
O
5.DA.05Hydromagnesite
Mg
 
5
(CO
 
3
)
 
4
(OH)
 
2
· 4H
 
2
O
5.DA.05Widgiemoolthalite
Ni
 
5
(CO
 
3
)
 
4
(OH)
 
2
· 5H
 
2
O
5.DA.05UM1986-10-CO:ClHMgMnZn
Mg
 
5
(Zn,Mn)
 
3
(CO
 
3
)
 
2
(OH,Cl)
 
12
· H
 
2
O
5.DA.05UM1987-01-CO:HMgS
Mg
 
4
(CO
 
3
)
 
2
(OH)
 
2
· 6H
 
2
O ?
5.DA.10Artinite
Mg
 
2
(CO
 
3
)(OH)
 
2
· 3H
 
2
O
5.DA.10Indigirite
Mg
 
2
Al
 
2
(CO
 
3
)
 
4
(OH)
 
2
· 15H
 
2
O
5.DA.10Chlorartinite
Mg
 
2
(CO
 
3
)(OH)Cl · 2H
 
2
O
5.DA.15Otwayite
Ni
 
2
(CO
 
3
)(OH)
 
2
· H
 
2
O
5.DA.15Zaratite
Ni
 
3
(CO
 
3
)(OH)
 
4
· 4H
 
2
O
5.DA.20Kambaldaite
NaNi
 
4
(CO
 
3
)
 
3
(OH)
 
3
· 3H
 
2
O
5.DA.30Claraite
(Cu,Zn)
 
3
(CO
 
3
)(OH)
 
4
· 4H
 
2
O
5.DA.35Hydroscarbroite
Al
 
14
(CO
 
3
)
 
3
(OH)
 
36
· nH
 
2
O
5.DA.35Scarbroite
Al
 
5
(CO
 
3
)(OH)
 
13
· 5H
 
2
O
5.DA.40Caresite
Fe
2+
4
Al
 
2
(OH)
 
12
[CO
 
3
] · 3H
 
2
O
5.DA.40Quintinite
Mg
 
4
Al
 
2
(OH)
 
12
[CO
 
3
] · 3H
 
2
O
5.DA.40Charmarite
Mn
2+
4
Al
 
2
(OH)
 
12
[CO
 
3
] · 3H
 
2
O
5.DA.45Stichtite-2H
Mg
 
6
(Cr,Al)
 
2
(CO
 
3
)(OH)
 
16
· 4H
 
2
O
5.DA.45Brugnatellite
Mg
 
6
Fe
3+
 
(CO
 
3
)(OH)
 
13
· 4H
 
2
O
5.DA.45Chlormagaluminite
Mg
 
4
Al
 
2
(OH)
 
12
Cl
 
2
· 3H
 
2
O
5.DA.45Hydrotalcite-2H
Mg
 
6
Al
 
2
(CO
 
3
)(OH)
 
16
· 4H
 
2
O
5.DA.45Pyroaurite-2H
Mg
 
6
Fe
3+
2
(CO
 
3
)(OH)
 
16
· 4H
 
2
O
5.DA.45Zaccagnaite
Zn
 
4
Al
 
2
(OH)
 
12
[CO
 
3
] · 3H
 
2
O
5.DA.50Comblainite
Ni
 
4
Co
 
2
(OH)
 
12
[CO
 
3
] · 3H
 
2
O
5.DA.50Desautelsite
Mg
 
6
Mn
3+
2
(OH)
 
16
[CO
 
3
] · 4H
 
2
O
5.DA.50Hydrotalcite
Mg
 
6
Al
 
2
(OH)
 
16
[CO
 
3
] · 4H
 
2
O
5.DA.50Pyroaurite
Mg
 
6
Fe
3+
2
(OH)
 
16
[CO
 
3
] · 4H
 
2
O
5.DA.50Reevesite
Ni
 
6
Fe
3+
2
(OH)
 
16
(CO
 
3
) · 4H
 
2
O
5.DA.50Stichtite
Mg
 
6
Cr
 
2
(OH)
 
16
[CO
 
3
] · 4H
 
2
O
5.DA.50Takovite
Ni
 
6
Al
 
2
(OH)
 
16
[CO
 
3
] · 4H
 
2
O
5.DA.50UM1998-10-CO:CoHNi
Co
 
6
Fe
 
2
(CO
 
3
)(OH)
 
16
· 4H
 
2
O ?
5.DA.55Coalingite
Mg
 
10
Fe
3+
2
(OH)
 
24
[CO
 
3
] · 2H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
11.2.1Malachite
Cu
 
2
(CO
 
3
)(OH)
 
2
11.2.2Azurite
Cu
 
3
(CO
 
3
)
 
2
(OH)
 
2
11.2.4Chalconatronite
Na
 
2
Cu(CO
 
3
)
 
2
· 3H
 
2
O

Other Names for Callaghanite

Other Languages:
German:Callaghanit
Russian:Каллагханит
Spanish:Callaghanita

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 Callaghanite

Reference List:

- +
American Mineralogist: 39: 630-635.

American Mineralogist: 58: 551.

Acta Crystallographica: 11: 169-174.

Internet Links for Callaghanite

Search Engines:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Callaghanite details from Handbook of Mineralogy (PDF)
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  • Localities for Callaghanite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (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.
    Austria
     
    • Styria
      • Leoben
        • St Stefan ob Leoben
    Postl, W. & Moser, B. (1988): Mineralogische Notizen aus der Steiermark. Mitt. Abt. Miner. Landesmuseum Joanneum, 56, 5-47.; R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993); Moser (1986)
    • Tyrol
      • North Tyrol
        • Inn valley
          • Brixlegg - Schwaz area
    Kolitsch, U. (2013): 1799) Anglesit, Brochantit, Calcit, Callaghanit, Connellit, Cuprit, Diopsid, Elyit, Forsterit, Kupfer, Lithargit, Magnesiochromit, Malachit, Monohydrocalcit, Phoenicochroit, Rouait und Willemit in Schlacken der Montanwerke Brixlegg, Tirol. Pp. 111-114 in Niedermayr, G. et al. (2013): Neue Mineralfunde aus Österreich LXII. Carinthia II, 203./123., 91-146.
    Germany
     
    • Saxony-Anhalt
      • Mansfeld Basin
        • Helbra
    H. Knoll; Fundstellen im Mansfelder Land, Interessante Mineralien aus den Schlacken der Kupferschiefer-Verhüttung. MineralienWelt, Jg 19 (2008), Heft 1 (Jan-Feb), pag 36-47.
        • Hettstedt
          • Copper-Silver smelter (Gottesbelohnung smelter; slag locality)
    Mineralien Welt 15 Jg Heft 2-2004and 19 JgHeft 1 2008,Horst Knoll Erfurt
    Italy
     
    • Liguria
      • Genova Province
        • Genova
          • Borzoli
    Palenzona, A., Martinelli, A., Castellano, F., Esposito, F., Esposito, M., Odicino, G. (2005): Callaghanite. Terzo ritrovamento assoluto della specie al Monte Ramazzo, Liguria. Rivista Mineralogica Italiana, 3/2005, 193-194. Odicino, G. (2006): La callaghanite di Monte Ramazzo. Paragenesi a confronto. Prie, 2, 31-36.
          • Varenna Valley
    Rivista Mineralogica Italiana, 22 (3), 39-41.
    USA
     
    • Nevada
      • Nye Co.
        • Gabbs District
    No reference listed
    NBMG Spec. Pub. 31 Minerals of Nevada
    • Oklahoma
      • Jackson Co.
        • Creta
    Rocks & Min. vol. 72 (1997)
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    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. 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 thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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