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Calumetite

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Calumet, Michigan
Formula:
Cu(OH,Cl)2 · 2H2O
Colour:
Azure blue; Powder blue
Lustre:
Pearly
Hardness:
2
Crystal System:
Orthorhombic
Name:
Named by Sidney A. Williams in 1963 for the town of Calumet, Michigan, USA, near which it was first discovered.
This page provides mineralogical data about Calumetite.


Hide all sections | Show all sections

Classification of CalumetiteHide

Approved
First Published:
1963
3.DA.40

3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
A : With Cu, etc., without Pb
6.2.5.1

6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
2 : X(OH)2
8.2.8

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

Physical Properties of CalumetiteHide

Pearly
Comment:
On basal cleavages
Colour:
Azure blue; Powder blue
Comment:
In masses: Brilliant azure blue inclining to powder blue
Hardness:
Tenacity:
Brittle

Optical Data of CalumetiteHide

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

Formula:
Cu(OH,Cl)2 · 2H2O
IMA Formula:
Cu(OH)2 · 2H2O

Crystallography of CalumetiteHide

Crystal System:
Orthorhombic
Morphology:
Basal pinacoid {001} and first order prism {110}.
Comment:
Neither point group nor space group are determined.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.50 (10)
3.76 (5)
3.42 (3)
3.30 (3)
3.02 (6)
2.481 (8)
2.341 (3)

Type Occurrence of CalumetiteHide

General Appearance of Type Material:
Occurs as spherules and sheaves of scaly crystals.
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, 115870.
Geological Setting of Type Material:
Copper deposit in basalt. The chlorine is thought to have been due to connate water.
Associated Minerals at Type Locality:

Other Language Names for CalumetiteHide

German:Calumetit
Spanish:Calumetita

Common AssociatesHide

Associated Minerals Based on Photo Data:
Copper2 photos of Calumetite associated with Copper on mindat.org.
Cuprite1 photo of Calumetite associated with Cuprite on mindat.org.
Tenorite1 photo of Calumetite associated with Tenorite on mindat.org.
Prehnite1 photo of Calumetite associated with Prehnite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

3.DA.05MelanothalliteCu2Cl2OOrth.
3.DA.10aAtacamiteCu2(OH)3ClOrth. mmm (2/m 2/m 2/m) : Pnma
3.DA.10bBotallackiteCu2(OH)3ClMon. 2/m : P21/m
3.DA.10bClinoatacamiteCu2(OH)3ClMon. 2/m
3.DA.10aHibbingiteFe2+2(OH)3ClOrth.
3.DA.10aKempiteMn2+2(OH)3ClOrth. mmm (2/m 2/m 2/m) : Pnma
3.DA.10cParatacamiteCu3(Cu,Zn)(OH)6Cl2Trig. 3m (3 2/m)
3.DA.10bBelloiteCu(OH)ClMon. 2/m : P21/b
3.DA.10cHerbertsmithiteCu3Zn(OH)6Cl2Trig. 3m (3 2/m) : R3m
3.DA.10cKapellasiteCu3Zn(OH)6Cl2Trig. 3m (3 2/m) : P3m1
3.DA.10cGillarditeCu3Ni(OH)6Cl2Trig. 3m (3 2/m) : R3m
3.DA.10cHaydeeiteCu3Mg(OH)6Cl2Trig. 3m (3 2/m) : P3m1
3.DA.15ClaringbulliteCu4ClF(OH)6Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
3.DA.15BarlowiteCu4BrF(OH)6Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
3.DA.20SimonkolleiteZn5Cl2(OH)8 · H2OTrig. 3m (3 2/m) : P3m1
3.DA.25ButtgenbachiteCu19(NO3)2(OH)32Cl4 · 2H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
3.DA.25ConnelliteCu19(SO4)(OH)32Cl4 · 3H2OHex. 6 m2 : P62c
3.DA.30AbhuriteSn21Cl16(OH)14O6Trig.
3.DA.35PonomareviteK4Cu4Cl10OMon.
3.DA.40AnthonyiteCu(OH,Cl)2 · 3H2OMon. 2/m
3.DA.45KhaidarkaniteNa0.34Cu4Al3(OH)14F3 · 2H2OMon.
3.DA.50BobkingiteCu5Cl2(OH)8 · 2H2OMon. 2/m : B2/m
3.DA.55AvdoniniteK2Cu5(OH)4Cl8 · H2OMon. 2/m
3.DA.60DroninoiteNi6Fe2+3(OH)16Cl2 · 4H2OTrig. 3m (3 2/m) : R3m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

8.2.1NantokiteCuClIso. 4 3m : F4 3m
8.2.2TolbachiteCuCl2Mon.
8.2.3EriochalciteCuCl2 · 2H2OOrth. mmm (2/m 2/m 2/m)
8.2.4AtacamiteCu2(OH)3ClOrth. mmm (2/m 2/m 2/m) : Pnma
8.2.5ParatacamiteCu3(Cu,Zn)(OH)6Cl2Trig. 3m (3 2/m)
8.2.6BotallackiteCu2(OH)3ClMon. 2/m : P21/m
8.2.7MelanothalliteCu2Cl2OOrth.
8.2.9AnthonyiteCu(OH,Cl)2 · 3H2OMon. 2/m
8.2.10ClaringbulliteCu4ClF(OH)6Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
8.2.11MarshiteCuIIso. 4 3m : F4 3m
8.2.12MitscherlichiteK2CuCl4 · 2H2OTet. 4/mmm (4/m 2/m 2/m)
8.2.13PonomareviteK4Cu4Cl10OMon.

Other InformationHide

Notes:
Soluble in cold, dilute acids but insoluble in ammonia and water.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for CalumetiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Williams, S.A. (1963) Anthonyite and calumetite, two new minerals from the Michigan copper district. American Mineralogist: 48: 614-619.

Internet Links for CalumetiteHide

Localities for CalumetiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Austria
 
  • Tyrol
    • North Tyrol
      • Inn valley
        • Brixlegg - Schwaz area
          • Brixlegg - Rattenberg
Schnorrer, G. & Poeverlein, R. (2008): Schwaz-Brixlegger Fundstellen. 6. Die Minerale des Gratlspitz bei Brixlegg in Tirol. Aufschluss 59, 7-28.
Germany
 
  • Hesse
Handbook of Mineralogy
  • Lower Saxony
    • Harz
      • Goslar
        • Astfeld
No reference listed
  • Rhineland-Palatinate
    • Lahn valley
Wittern: "Mineralfundorte in Deutschland", 2001
        • Frücht
Der Aufschluss Vol.55, March/April 2004
    • Siegerland
      • Niederfischbach
Weiss: "Mineralfundstellen, Deutschland West", 1990
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
Schnorrer-Köhler, G., Standfuss, K. & Standfuss, L. (1981): Neufunde von Mineralen aus den antiken Bleischlacken Laurions. Der Aufschluss, 32, 165-169.; Gelaude, Piet, van Kalmthout, Piet and Rewitzer, Christian (1996): Laurion: The Minerals in the Ancient Slags
Italy
 
  • Liguria
    • Genova Province
      • Genova
        • Varenna Valley
Rivista Mineralogica Italiana, 2 (Avril/Juin), 175-188.
USA (TL)
 
  • Michigan
    • Houghton Co.
      • Centennial
Williams, S.A. (1963): Anthonyite and calumetite, two new minerals from the Michigan Copper District. American Mineralogist. 48, 614-619; 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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