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Marshite

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Formula:
CuI
System:
Isometric
Colour:
Colorless to pale yellow ...
Lustre:
Sub-Adamantine, Greasy
Hardness:
Name:
After Australian C.W. Marsh, who first described the mineral.
Isostructural with:

Classification of Marshite

Approved, 'Grandfathered' (first described prior to 1959)
3.AA.05

3 : HALIDES
A : Simple halides, without H2O
A : M:X = 1:1, 2:3, 3:5, etc.
9.1.7.3

9 : NORMAL HALIDES
1 : AX
8.2.11

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

Physical Properties of Marshite

Sub-Adamantine, Greasy
Diaphaneity (Transparency):
Transparent
Comment:
Becomes dull on extended exposure to light
Colour:
Colorless to pale yellow when fresh, turns pink to dark brownish-red.
Streak:
Yellow
Hardness (Mohs):
Tenacity:
Brittle
Cleavage:
Perfect
{011}.
Fracture:
Conchoidal, Sub-Conchoidal
Density:
5.68 g/cm3 (Measured)    5.71 g/cm3 (Calculated)

Optical Data of Marshite

Type:
Isotropic
Pleochroism:
Non-pleochroic
Comments:
May exhibit anomalous birefringence.

Chemical Properties of Marshite

Formula:
CuI
Elements listed in formula:

Crystallography of Marshite

Crystal System:
Isometric
Class (H-M):
4 3m - Hextetrahedral
Space Group:
F4 3m
Cell Parameters:
a = 6.05 Å
Unit Cell Volume:
V 221.45 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Crystals usually tetrahedral, with modifying {001} or other forms; rarely cubo-octahedral through equal development of {001}, {111} and {_111}. {001} and {hhl} striated parallel to the edges with the tetrahedra. Positive and negative tetrahedra exhibit no differences in surface characteristics.
Twinning:
On {111}, repeated at times.
Comment:
Tetrahedral
X-Ray Powder Diffraction Data:
d-spacingIntensity
3.49 (100)
3.03 (10)
2.14 (60)
1.82 (30)
1.51 (10)
1.39 (10)
1.24 (10)
1.16 (10)
Comments:
6-246 (synthetic)

Type Occurrence of Marshite

Associated Minerals at Type Locality:

Relationship of Marshite to other Species

Series:
Forms a series with Miersite (see here)
Other Members of Group:
3.AA.05Miersite(Ag,Cu)I
3.AA.05NantokiteCuCl
3.AA.05UM1999-11:I:CuSCu(I,S)
3.AA.10IodargyriteAgI
3.AA.10Tocornalite(Ag,Hg)I
3.AA.15BromargyriteAgBr
3.AA.15ChlorargyriteAgCl
3.AA.20CarobbiiteKF
3.AA.20GriceiteLiF
3.AA.20HaliteNaCl
3.AA.20SylviteKCl
3.AA.20VilliaumiteNaF
3.AA.25SalammoniacNH4Cl
3.AA.25UM1998-03-Cl:TlTlCl
3.AA.25LafossaiteTlCl
3.AA.30CalomelHgCl
3.AA.30KuzminiteHg(Br,Cl)
3.AA.30MoscheliteHgI
3.AA.35NeighboriteNaMgF3
3.AA.40ChlorocalciteKCaCl3
3.AA.45KolaritePbTeCl2
3.AA.50RadhakrishnaitePbTe3(Cl,S)2
3.AA.55ChallacolloiteKPb2Cl5
3.AA.60HephaistositeTlPb2Cl5
8.2.1NantokiteCuCl
8.2.2TolbachiteCuCl2
8.2.3EriochalciteCuCl2 · 2H2O
8.2.4AtacamiteCu2Cl(OH)3
8.2.5ParatacamiteCu32+(Cu,Zn)(OH)6Cl2
8.2.6BotallackiteCu2Cl(OH)3
8.2.7MelanothalliteCu2OCl2
8.2.8CalumetiteCu(OH)2 · 2H2O
8.2.9AnthonyiteCu(OH)2 · 3H2O
8.2.10ClaringbulliteCu42+FCl(OH)6
8.2.12MitscherlichiteK2CuCl4 · 2H2O
8.2.13PonomareviteK4Cu4OCl10

Other Names for Marshite

Name in Other Languages:

Other Information

Frequently fluorescent red in both SW and LW
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 Marshite

Reference List:
Marsh, C.W. (1892) Proceedings of the Royal Society of New South Wales: 26: 326-332 (as Native copper iodide).

Marsh, C.W., Liversidge, A. (1892) On native copper iodide (marshite) and other minerals from Broken Hills, N. S. Wales. Journal and Proceedings of the Royal Society of New South Wales: 26: 326-332.

Miers (1894) Zeitschrift für Kristallographie: 24: 207.

Prior, G.T. (1902) The identity of kilbrickenite with geocronite: And analyses of miersite, marshite, and copper-pyrites. Mineralogical Magazine: 13: 186-190.

Aminoff (1922) Geol För. Förh.: 44: 444.

Barth and Lunde (1925) Norsk Geol. Tidsskr.: 8: 281.

Jarrell, O.W. (1939) Marshite and other minerals from Chuquicamata, Chile. American Mineralogist: 24: 629-635.

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: 20-22.

Cooper, M.A., Hawthorne, F.C. (1997) A note on the crystal structure of marshite. The Canadian Mineralogist: 35: 785-786.

Millsteed, P.W. (1998) Marshite - miersite solid solution and iodargyrite from Broken Hill, New South Wales, Australia. Mineralogical Magazine: 62: 471-475.

Internet Links for Marshite

mindat.org URL:
https://www.mindat.org/min-2580.html
Please feel free to link to this page.

Localities for Marshite

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.
(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.
Australia
 
  • New South Wales
    • Yancowinna Co.
Palache, Charles, Harry Berman & Clifford Frondel (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume II, John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 21; Australian Mineralogist (1990): 5: 95.
        • Block 14 opencut
Rob Lavinsky
Marsh (1892) Proceedings of the Royal Society of New South Wales: 26: 326-332 (as Native copper iodide).
        • Broken Hill South Mine (BHS Mine; South Mine)
Australian Min. 3:1 (1997)
Rocks & Min.:62:224-225.
  • South Australia
    • Yorke Peninsula
      • Moonta
Elliot, P. (1990) Marshite from the Poona Mine, Moonta, South Australia. Australian Mineralogist, Vol. 5, pg. 95-96.
Chile
 
  • Antofagasta Region
    • El Loa Province
      • Calama
        • Chuquicamata District
Palache, Charles, Harry Berman & Clifford Frondel (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume II, John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 21.; Reich, M., Snyder, G. T., Álvarez, F., Pérez, A., Palacios, C., Vargas, G., ... & Fehn, U. (2013). Using iodine isotopes to constrain supergene fluid sources in arid regions: insights from the Chuquicamata oxide blanket. Economic Geology, 108(1), 163-171.
  • Atacama Region
    • Chañaral Province
      • Inca de Oro
        • San Pedro de Cachiyuyo District
maurizio dini collection - analysed specimens
  • Tarapacá Region
    • Iquique Province
      • Santa Rosa-Huantajaya District
Palache et al (1944), Dana's System of Mineralogy, seventh ed., vol. II: 22.
Germany
 
  • Rhineland-Palatinate
    • Lahn valley
      • Bad Ems District
        • Frücht
Der Aufschluss Vol.55, March/April 2004
Russia
 
  • Western-Siberian Region
    • Altaiskii Krai
      • Rudnyi Altai
Minerals offered by Excalibur minerals, July 2009; Pekov, I.V., Lykova, I.S., Bryzgalov, I.A., Ksenofontov, D.A., Zyryanova, L.A. & Litvinov, N.D. (2010): Extremely rich iodide mineralization at the Rubtsovskoe base metal deposit (North West Altay, Russia) and its genesis. 20th General Meeting of the IMA (IMA2010), Budapest, Hungary, August 21-27, CD of Abstracts, p. 416.
South Africa
 
  • Mpumalanga Province
    • Nkangala District
Meulenbeld, P.M.P.B., Grote, W. & Verryn, S. (2014) The Albert silver mine and trippkeite occurrence. Rock & Minerals 89(5), 417-422.
Mineral and/or Locality  
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