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Marshite

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Formula:
CuI
Colour:
Colorless to pale yellow when fresh, turns pink to dark brownish-red.
Lustre:
Sub-Adamantine, Greasy
Hardness:
Specific Gravity:
5.68
Crystal System:
Isometric
Name:
After Australian C.W. Marsh, who first described the mineral.
Isostructural with:
Hide all sections | Show all sections

Classification of MarshiteHide

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 MarshiteHide

Sub-Adamantine, Greasy
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:
2½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
{011}.
Fracture:
Conchoidal, Sub-Conchoidal
Density:
5.68 g/cm3 (Measured)    5.71 g/cm3 (Calculated)

Optical Data of MarshiteHide

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

Chemical Properties of MarshiteHide

Formula:
CuI

Crystallography of MarshiteHide

Crystal System:
Isometric
Class (H-M):
4 3m - Hextetrahedral
Space Group:
F4 3m
Cell Parameters:
a = 6.05 Å
Unit Cell 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 DiffractionHide

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 MarshiteHide

Synonyms of MarshiteHide

Other Language Names for MarshiteHide

Varieties of MarshiteHide

Cupro-iodargyriteA silver-bearing variety of marshite with approximately a 1:1 Ag:Cu ratio.

Relationship of Marshite to other SpeciesHide

Other Members of this group:
BromargyriteAgBrIso. m3m (4/m 3 2/m) : Fm3m
ChlorargyriteAgClIso. m3m (4/m 3 2/m) : Fm3m
Miersite(Ag,Cu)IIso. 4 3m : F4 3m
NantokiteCuClIso. 4 3m : F4 3m
Forms a series with:

Common AssociatesHide

Associated Minerals Based on Photo Data:
Cuprite13 photos of Marshite associated with Cuprite on mindat.org.
Atacamite6 photos of Marshite associated with Atacamite on mindat.org.
Antlerite4 photos of Marshite associated with Antlerite on mindat.org.
Copper4 photos of Marshite associated with Copper on mindat.org.
Chalcotrichite3 photos of Marshite associated with Chalcotrichite on mindat.org.
Leightonite2 photos of Marshite associated with Leightonite on mindat.org.
Paratacamite2 photos of Marshite associated with Paratacamite on mindat.org.
Quartz2 photos of Marshite associated with Quartz on mindat.org.
Azurite1 photo of Marshite associated with Azurite on mindat.org.
Stolzite1 photo of Marshite associated with Stolzite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

3.AA.05Miersite(Ag,Cu)IIso. 4 3m : F4 3m
3.AA.05NantokiteCuClIso. 4 3m : F4 3m
3.AA.05UM1999-11:I:CuSCu(I,S)
3.AA.10IodargyriteAgIHex. 6mm : P6mm
3.AA.10Tocornalite(Ag,Hg)I
3.AA.15BromargyriteAgBrIso. m3m (4/m 3 2/m) : Fm3m
3.AA.15ChlorargyriteAgClIso. m3m (4/m 3 2/m) : Fm3m
3.AA.20CarobbiiteKFIso. m3m (4/m 3 2/m)
3.AA.20GriceiteLiFIso. m3m (4/m 3 2/m) : Fm3m
3.AA.20HaliteNaClIso. m3m (4/m 3 2/m) : Fm3m
3.AA.20SylviteKClIso. m3m (4/m 3 2/m) : Fm3m
3.AA.20VilliaumiteNaFIso. m3m (4/m 3 2/m) : Fd3m
3.AA.25SalammoniacNH4ClIso. 4 3 2
3.AA.25UM1998-03-Cl:TlTlCl
3.AA.25LafossaiteTl(Cl,Br)Iso. m3m (4/m 3 2/m) : Pm3m
3.AA.30Calomel(Hg2)2+Cl2Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
3.AA.30Kuzminite(Hg2+2)(Br,Cl)2Tet.
3.AA.30Moschelite(Hg2+2)I2Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
3.AA.35NeighboriteNaMgF3Orth. mmm (2/m 2/m 2/m)
3.AA.40ChlorocalciteKCaCl3Orth. mmm (2/m 2/m 2/m) : Pnma
3.AA.45KolaritePbTeCl2Orth.
3.AA.50RadhakrishnaitePbTe3(Cl,S)2Tet.
3.AA.55ChallacolloiteKPb2Cl5Mon. 2/m : P21/b
3.AA.60HephaistositeTlPb2Cl5Mon. 2/m : P21/b

Related Minerals - Dana Grouping (8th Ed.)Hide

9.1.7.1NantokiteCuClIso. 4 3m : F4 3m
9.1.7.2Miersite(Ag,Cu)IIso. 4 3m : F4 3m

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.
8.2.8CalumetiteCu(OH,Cl)2 · 2H2OOrth.
8.2.9AnthonyiteCu(OH,Cl)2 · 3H2OMon. 2/m
8.2.10ClaringbulliteCu4ClF(OH)6Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
8.2.12MitscherlichiteK2CuCl4 · 2H2OTet. 4/mmm (4/m 2/m 2/m)
8.2.13PonomareviteK4Cu4Cl10OMon.

Fluorescence of MarshiteHide

Frequently fluorescent red in both SW and LW

Other InformationHide

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 MarshiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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 MarshiteHide

Localities for MarshiteHide

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.
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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