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Calumetite

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Centennial No. 6 Shaft, Centennial Mine, Centennial, Houghton Co., Michigan, USA
© Brent Thorne

Show Calumetite Photos (3)
Formula:
Cu(OH,Cl)
 
2
 · 2H
 
2
O
System:OrthorhombicHardness:2
This page provides mineralogical data about Calumetite.

Classification of Calumetite

IMA status:Approved
Strunz 8th edition ID:3/D.01-70
Nickel-Strunz 10th (pending) edition ID:3.DA.40

3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
A : With Cu, etc., without Pb
Dana 8th edition ID:6.2.5.1

6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
2 : X(OH)2
Hey's CIM Ref.:8.2.8

8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
2 : Halides of Cu
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Type Occurrence of Calumetite

Type Locality:Centennial Mine, Centennial, Houghton Co., Michigan, USA
Year of Discovery:1963

Physical Properties of Calumetite

Hardness (Mohs):2

Crystallography of Calumetite

Crystal System:Orthorhombic

Optical Data of Calumetite

Type:Biaxial
RI values: nα = 1.666 nβ = 1.690 nγ = 1.690
2V:Measured: 2°
Maximum Birefringence:δ = 0.024

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

Chemical Properties of Calumetite

Formula:
Cu(OH,Cl)
 
2
 · 2H
 
2
O
Essential elements:Cu, H, O
All elements listed in formula:Cl, Cu, H, O

Relationship of Calumetite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
3.DA.05Melanothallite
Cu
 
2
[O|Cl
 
2
]
3.DA.10aAtacamite
Cu
 
2
[(OH)
 
3
|Cl]
3.DA.10bBotallackite
Cu
 
2
[(OH)
 
3
|Cl]
3.DA.10bClinoatacamite
Cu
 
2
[(OH)
 
3
|Cl]
3.DA.10aHibbingite
Fe
2+
2
[(OH)
 
3
|Cl]
3.DA.10aKempite
Mn
2+
2
[(OH)
 
3
|Cl]
3.DA.10cParatacamite
Cu
 
3
(Cu,Zn)[(OH)
 
3
|Cl]
 
2
3.DA.10bBelloite
Cu[OH|Cl]
3.DA.10cHerbertsmithite
Cu
 
3
Zn[(OH)
 
3
|Cl]
 
2
3.DA.10cKapellasite
Cu
 
3
Zn[(OH)
 
3
|Cl]
 
2
3.DA.10cGillardite
Cu
 
3
NiCl
 
2
(OH)
 
6
3.DA.10cHaydeeite
Cu
 
3
Mg(OH)
 
6
Cl
 
2
3.DA.15Claringbullite
Cu
 
4
[(OH)
 
7
|Cl] · nH
 
2
O
3.DA.20Simonkolleite
Zn
 
5
[(OH)
 
8
|Cl
 
2
] · H
 
2
O
3.DA.25Buttgenbachite
Cu
 
19
[(OH)
 
32
|(NO
 
3
)
 
2
|Cl
 
4
] · 2H
 
2
O
3.DA.25Connellite
Cu
 
19
[(OH)
 
32
|SO
 
4
|Cl
 
4
] · 3H
 
2
O
3.DA.30Abhurite
Sn
 
21
Cl
 
16
(OH)
 
14
O
 
6
3.DA.35Ponomarevite
K
 
4
Cu
 
4
[O|Cl
 
10
]
3.DA.40Anthonyite
Cu(OH,Cl)
 
2
 · 3H
 
2
O
3.DA.45Khaidarkanite
Na
 
0.34
Cu
 
4
Al
 
3
(OH)
 
14
F
 
3
·2H
 
2
O
3.DA.50Bobkingite
Cu
 
5
[(OH)
 
8
|Cl
 
2
] · 2H
 
2
O
3.DA.55Avdoninite
K
 
2
Cu
 
5
[(OH)
 
4
|Cl
 
8
] · H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
8.2.1Nantokite
CuCl
8.2.2Tolbachite
CuCl
 
2
8.2.3Eriochalcite
CuCl
 
2
·2H
 
2
O
8.2.4Atacamite
Cu
 
2
[(OH)
 
3
|Cl]
8.2.5Paratacamite
Cu
 
3
(Cu,Zn)[(OH)
 
3
|Cl]
 
2
8.2.6Botallackite
Cu
 
2
[(OH)
 
3
|Cl]
8.2.7Melanothallite
Cu
 
2
[O|Cl
 
2
]
8.2.9Anthonyite
Cu(OH,Cl)
 
2
 · 3H
 
2
O
8.2.10Claringbullite
Cu
 
4
[(OH)
 
7
|Cl] · nH
 
2
O
8.2.11Marshite
CuI
8.2.12Mitscherlichite
K
 
2
[CuCl
 
4
] · 2H
 
2
O
8.2.13Ponomarevite
K
 
4
Cu
 
4
[O|Cl
 
10
]

Other Names for Calumetite

Other Languages:
German:Calumetit
Spanish:Calumetita

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 Calumetite

Reference List:Williams, S. A. (1963): Anthonyite and calumetite, two new minerals from the Michigan copper district. American Mineralogist: 48: 614-619.

Articles/Blogs about Calumetite

Internet Links for Calumetite

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    Localities for Calumetite

    Hide Locality List
    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.
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    (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
     
    • Tyrol
      • North Tyrol
        • Inn valley
          • Brixlegg - Schwaz area
    		Lapis 19(7/8):13-78 (1994)
    Schnorrer, G. & Poeverlein, R. (2008): Schwaz-Brixlegger Fundstellen. 6. Die Minerale des Gratlspitz bei Brixlegg in Tirol. Aufschluss 59, 7-28.
    Germany
     
    • Lower Saxony
      • Harz Mts
        • Goslar
          • Astfeld
    		No reference listed
    • Rhineland-Palatinate
      • Lahn valley
    		Wittern: "Mineralfundorte in Deutschland", 2001
      • Siegerland
        • Niederfischbach
    		Weiss: "Mineralfundstellen, Deutschland West", 1990
    Greece
     
    • Attikí (Attica; Attika) Prefecture
      • Lavrion (Laurion; Laurium) District
    		Gelaude, Piet, van Kalmthout, Piet and Rewitzer, Christian, Laurion: The Minerals in the Ancient Slags
    Italy
     
    • Liguria
      • Genova Province
        • Genova
          • Varenna Valley
    		Rivista Mineralogica Italiana, 2 (Avril/Juin), 175-188.
    USA
     
    • Michigan
      • Houghton Co.
        • Centennial
    		Rocks & Min.:58:109.
    Rocks & Minerals 82:276-297
    Brent Thorne collection
      • Keweenaw Co.
        • Ahmeek
          • Ahmeek mine
    		Mineralogy of Michigan (2004) Heinrich & Robinson
      • Ontonagon Co.
        • White Pine
    		R&M 74:3 p160-176
    Mineral and/or Locality
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