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Marshite

A valid IMA mineral species - grandfathered
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About MarshiteHide

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:

Unique IdentifiersHide

Mindat ID:
2580
Long-form identifier:
mindat:1:1:2580:1

IMA Classification of MarshiteHide

Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Cu1+I1-

Classification of MarshiteHide

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

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
MshIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

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.

Chemistry of MarshiteHide

Mindat Formula:
CuI
Element Weights:
Element% weight
I66.634 %
Cu33.366 %

Calculated from ideal end-member formula.
I
Cu

Crystallography of MarshiteHide

Crystal System:
Isometric
Class (H-M):
43m - Hextetrahedral
Space Group:
F43m
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

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0005529MarshiteCooper M A, Hawthorne F C (1997) A note on the crystal structure of marshite The Canadian Mineralogist 35 785-78619970293
0015184MarshiteHull S, Keen D A (1994) High-pressure polymorphism of the copper(I) halides: A neutron-diffraction study to ~10 GPa Physical Review B50 5868-588519940293
0015183MarshiteHull S, Keen D A (1994) High-pressure polymorphism of the copper(I) halides: A neutron-diffraction study to ~10 GPa Physical Review B50 5868-588519940293
0015182MarshiteHull S, Keen D A (1994) High-pressure polymorphism of the copper(I) halides: A neutron-diffraction study to ~10 GPa Physical Review B50 5868-588519940293
0015181MarshiteHull S, Keen D A (1994) High-pressure polymorphism of the copper(I) halides: A neutron-diffraction study to ~10 GPa Physical Review B50 5868-588519940293
0015180MarshiteHull S, Keen D A (1994) High-pressure polymorphism of the copper(I) halides: A neutron-diffraction study to ~10 GPa Physical Review B50 5868-588519940293
0011522MarshiteWyckoff R W G (1963) Second edition. Interscience Publishers, New York, New York Crystal Structures 1 85-23719630293
0018105MarshiteWyckoff R, Posnjak E (1922) The crystal structures of the cuprous halides _cod_database_code 1011239 Journal of the American Chemical Society 44 30-3619220293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.49 Å(100)
3.03 Å(10)
2.14 Å(60)
1.82 Å(30)
1.51 Å(10)
1.39 Å(10)
1.24 Å(10)
1.16 Å(10)
Comments:
6-246 (synthetic)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 7: Great Oxidation Event<2.4
47g : [Halogen-bearing surface weathering minerals]

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 Chlorargyrite Group:
BromargyriteAgBrIso. m3m(4/m32/m) : Fm3m
ChlorargyriteAgClIso. m3m(4/m32/m) : Fm3m
Miersite(Ag,Cu)IIso. 43m : F43m
NantokiteCuClIso. 43m : F43m
Forms a series with:

Common AssociatesHide

Associations Based on Photo Data:
24 photos of Marshite associated with CupriteCu2O
11 photos of Marshite associated with AtacamiteCu2(OH)3Cl
10 photos of Marshite associated with Native CopperCu
4 photos of Marshite associated with SmithsoniteZnCO3
4 photos of Marshite associated with BrochantiteCu4(SO4)(OH)6
4 photos of Marshite associated with AntleriteCu3(SO4)(OH)4
3 photos of Marshite associated with Aurichalcite(Zn,Cu)5(CO3)2(OH)6
3 photos of Marshite associated with GypsumCaSO4 · 2H2O
3 photos of Marshite associated with 'Chalcotrichite'Cu2O
2 photos of Marshite associated with QuartzSiO2

Related Minerals - Strunz-mindat GroupingHide

3.AA.Brontesite(NH4)3PbCl5Orth. mmm(2/m2/m2/m) : Pnma
3.AA.05NantokiteCuClIso. 43m : F43m
3.AA.05'UM1999-11:I:CuS'Cu(I,S)
3.AA.05Miersite(Ag,Cu)IIso. 43m : F43m
3.AA.10Tocornalite(Ag,Hg)I (?)Hex.
3.AA.10IodargyriteAgIHex. 6mm : P6mm
3.AA.15BromargyriteAgBrIso. m3m(4/m32/m) : Fm3m
3.AA.15ChlorargyriteAgClIso. m3m(4/m32/m) : Fm3m
3.AA.20SylviteKClIso. m3m(4/m32/m) : Fm3m
3.AA.20HaliteNaClIso. m3m(4/m32/m) : Fm3m
3.AA.20VilliaumiteNaFIso. m3m(4/m32/m) : Fd3m
3.AA.20CarobbiiteKFIso. m3m(4/m32/m) : Fm3m
3.AA.20GriceiteLiFIso. m3m(4/m32/m) : Fm3m
3.AA.25'UM1998-03-Cl:Tl'TlCl
3.AA.25NataliyamalikiteTlIOrth. mmm(2/m2/m2/m) : Cmcm
3.AA.25LafossaiteTl(Cl,Br)Iso. m3m(4/m32/m) : Pm3m
3.AA.25SalammoniacNH4ClIso. m3m(4/m32/m)
3.AA.30Calomel[Hg2]2+Cl2Tet. 4/mmm(4/m2/m2/m) : I4/mmm
3.AA.30Moschelite[Hg2]2+I2Tet. 4/mmm(4/m2/m2/m) : I4/mmm
3.AA.30KuzminiteHgBrTet. 4/mmm(4/m2/m2/m) : I4/mmm
3.AA.35NeighboriteNaMgF3Orth. mmm(2/m2/m2/m)
3.AA.35ParascandolaiteKMgF3Iso. m3m(4/m32/m) : Pm3m
3.AA.40JavorieiteKFeCl3Orth. mmm(2/m2/m2/m) : Pnma
3.AA.40ChlorocalciteKCaCl3Orth. mmm(2/m2/m2/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
3.AA.90PseudocotunniteK2PbCl4Orth.

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.

Internet Links for MarshiteHide

References for MarshiteHide

Reference List:

Localities for MarshiteHide

Showing 22 localities.

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.
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Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Australia
 
  • New South Wales
    • Yancowinna Co.
      • Broken Hill district
Palache et al. (1951) +1 other reference
Steve Sorrell Collection
Marsh (1892)
Museum Victoria collection
          • Broken Hill South Mine (BHS Mine; South Mine)
Birch et al. (1997)
Smith (1987)
          • North Mine
            • Block 39
Lavinsky (n.d.)
  • South Australia
    • Copper Coast Council
Elliot (1990)
    • Pastoral Unincorporated Area
      • Mingary
        • Mutooroo area
          • Mutooroo Homestead
Sorrell (n.d.)
Brazil
 
  • Paraíba
    • Nova Palmeira
Thomas et al. (2023)
Chile
 
  • Antofagasta
    • El Loa Province
      • Calama
        • Chuquicamata District
Jarrell (1939) +2 other references
  • Atacama
    • Chañaral Province
      • Diego de Almagro
        • San Pedro de Cachiyuyo mining district
          • Delirio mine
Maurizio Dini collection - analysed ...
    • Huasco Province
      • Alto del Carmen
Chouinard et al. (2005)
  • Tarapacá
    • Iquique Province
      • Santa Rosa-Huantajaya mining district (Huantajaya mining district)
[var: Cupro-iodargyrite] Palache et al (1944)
Germany
 
  • Rhineland-Palatinate
    • Rhein-Lahn-Kreis
      • Lahnstein
        • Friedrichssegen
[var: Cupro-iodargyrite] Der Aufschluss Vol.55
Mexico
 
  • Sonora
    • Santa Cruz Municipality
      • Milpillas
Jones et al. (2021)
Mongolia
 
  • Ömnögovi Province
    • Khanbogd District
Davaasuren et al. (2016)
Russia
 
  • Altai Krai
    • Rubtsovsky District
Minerals offered by Excalibur minerals +1 other reference
  • Tuva
    • Sut-Kholsky District
      • Aldan-Maadyr ore cluster
Kuzhuget et al. (2015)
South Africa
 
  • Mpumalanga
    • Nkangala District Municipality
      • Thembisile Hani Local Municipality
Meulenbeld et al. (2014)
 
and/or  
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