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Calumetite

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

Classification of Calumetite

Approved
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
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Type Occurrence of Calumetite

Year of Discovery:
1963

Physical Properties of Calumetite

Pearly
Comment:
On basal cleavages
Colour:
Azure blue; Powder blue
Comment:
In masses: Brilliant azure blue inclining to powder blue
Hardness (Mohs):
2

Crystallography of Calumetite

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

Optical Data of Calumetite

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 Calumetite

Formula:
Cu(OH,Cl)2 · 2H2O
Essential elements:
All elements listed in formula:

Relationship of Calumetite to other Species

3.DA.05MelanothalliteCu2Cl2O
3.DA.10aAtacamiteCu2(OH)3Cl
3.DA.10bBotallackiteCu2(OH)3Cl
3.DA.10bClinoatacamiteCu2(OH)3Cl
3.DA.10aHibbingiteFe22+(OH)3Cl
3.DA.10aKempiteMn22+(OH)3Cl
3.DA.10cParatacamiteCu3(Cu,Zn)(OH)6Cl2
3.DA.10bBelloiteCu(OH)Cl
3.DA.10cHerbertsmithiteCu3Zn(OH)6Cl2
3.DA.10cKapellasiteCu3Zn(OH)6Cl2
3.DA.10cGillarditeCu3Ni(OH)6Cl2
3.DA.10cHaydeeiteCu3Mg(OH)6Cl2
3.DA.10dAnatacamiteCu2(OH)3Cl
3.DA.15ClaringbulliteCu4ClF(OH)6
3.DA.15BarlowiteCu4BrF(OH)6
3.DA.20SimonkolleiteZn5Cl2(OH)8 · H2O
3.DA.25ButtgenbachiteCu19(NO3)2(OH)32Cl4 · 2H2O
3.DA.25ConnelliteCu19(SO4)(OH)32Cl4 · 3H2O
3.DA.30AbhuriteSn21Cl16(OH)14O6
3.DA.35PonomareviteK4Cu4Cl10O
3.DA.40AnthonyiteCu(OH,Cl)2 · 3H2O
3.DA.45KhaidarkaniteNa0.34Cu4Al3(OH)14F3 · 2H2O
3.DA.50BobkingiteCu5Cl2(OH)8 · 2H2O
3.DA.55AvdoniniteK2Cu5(OH)4Cl8 · H2O
3.DA.60DroninoiteNi6Fe32+(OH)16Cl2 · 4H2O
8.2.1NantokiteCuCl
8.2.2TolbachiteCuCl2
8.2.3EriochalciteCuCl2 · 2H2O
8.2.4AtacamiteCu2(OH)3Cl
8.2.5ParatacamiteCu3(Cu,Zn)(OH)6Cl2
8.2.6BotallackiteCu2(OH)3Cl
8.2.7MelanothalliteCu2Cl2O
8.2.9AnthonyiteCu(OH,Cl)2 · 3H2O
8.2.10ClaringbulliteCu4ClF(OH)6
8.2.11MarshiteCuI
8.2.12MitscherlichiteK2CuCl4 · 2H2O
8.2.13PonomareviteK4Cu4Cl10O

Other Names for Calumetite

Name in Other Languages:
German:Calumetit
Spanish:Calumetita

Other Information

Other Information:
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 Calumetite

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

Internet Links for Calumetite

Localities for Calumetite

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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
          • Brixlegg - Rattenberg
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
      • 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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