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Marshite

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Big Photo

Broken Hill, Yancowinna Co., New South Wales, Australia
© Steve Sorrell

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Formula:
CuI
System:IsometricColour:Colorless to pale yellow ...
Lustre:Sub-Adamantine, GreasyHardness:2½
Member of:Chlorargyrite Group
Name:After Australian C.W. Marsh, who first described the mineral.
Isostructural with:Nantokite


Chlorargyrite Group. Marshite-Miersite Series.

Classification of Marshite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:3/A.01-20
Nickel-Strunz 10th (pending) edition ID:3.AA.05

3 : HALIDES
A : Simple halides, without H2O
A : M:X = 1:1, 2:3, 3:5, etc.
Dana 8th edition ID:9.1.7.3

9 : NORMAL HALIDES
1 : AX
Hey's CIM Ref.:8.2.11

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

Type Locality:Broken Hill Proprietary Mine (Proprietary Mine; BHP Mine), Broken Hill, Yancowinna Co., New South Wales, Australia
Year of Discovery:1892
Associated Minerals at type locality:
WadLimoniteCupriteCopperCerussite

Physical Properties of Marshite

Lustre: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):2½
Tenacity:Brittle
Cleavage:Perfect
{011}.
Fracture:Conchoidal, Sub-Conchoidal
Density (measured):5.68 g/cm3
Density (calculated):5.71 g/cm3

Crystallography of Marshite

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

Optical Data of Marshite

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

Chemical Properties of Marshite

Formula:
CuI
Essential elements:Cu, I
All elements listed in formula:Cu, I

Relationship of Marshite to other Species

Series:Forms a series with Miersite (see here)
Member of:Chlorargyrite Group
Other Members of Group:

- +
Related Minerals - Nickel-Strunz Grouping):

- +
3.AA.05Miersite
(Ag,Cu)I
3.AA.05Nantokite
CuCl
3.AA.05UM1999-11:I:CuS
Cu(I,S)
3.AA.10Iodargyrite
AgI
3.AA.10Tocornalite
(Ag,Hg)I
3.AA.15Bromargyrite
AgBr
3.AA.15Chlorargyrite
AgCl
3.AA.20Carobbiite
KF
3.AA.20Griceite
LiF
3.AA.20Halite
NaCl
3.AA.20Sylvite
KCl
3.AA.20Villiaumite
NaF
3.AA.25Salammoniac
NH
 
4
Cl
3.AA.25UM1998-03-Cl:Tl
TlCl
3.AA.25Lafossaite
Tl(Cl,Br)
3.AA.30Calomel
(Hg
+
2
)Cl
 
2
3.AA.30Kuzminite
(Hg
+
2
)(Br,Cl)
 
2
3.AA.30Moschelite
(Hg
+
2
)I
 
2
3.AA.35Neighborite
NaMgF
 
3
3.AA.40Chlorocalcite
KCaCl
 
3
3.AA.45Kolarite
PbTeCl
 
2
3.AA.50Radhakrishnaite
PbTe
 
3
(Cl,S)
 
2
3.AA.55Challacolloite
KPb
 
2
Cl
 
5
3.AA.60Hephaistosite
TlPb
 
2
Cl
 
5
Related Minerals - Hey's Index Grouping:

- +
8.2.1Nantokite
CuCl
8.2.2Tolbachite
CuCl
 
2
8.2.3Eriochalcite
CuCl
 
2
 · 2H
 
2
O
8.2.4Atacamite
Cu
 
2
(OH)
 
3
Cl
8.2.5Paratacamite
Cu
 
3
(Cu,Zn)(OH)
 
6
Cl
 
2
8.2.6Botallackite
Cu
 
2
(OH)
 
3
Cl
8.2.7Melanothallite
Cu
 
2
Cl
 
2
O
8.2.8Calumetite
Cu(OH,Cl)
 
2
 · 2H
 
2
O
8.2.9Anthonyite
Cu(OH,Cl)
 
2
 · 3H
 
2
O
8.2.10Claringbullite
Cu
 
4
(OH)
 
7
Cl · nH
 
2
O
8.2.12Mitscherlichite
K
 
2
CuCl
 
4
 · 2H
 
2
O
8.2.13Ponomarevite
K
 
4
Cu
 
4
Cl
 
10
O

Other Names for Marshite

Synonyms:
MarszytNative copper iodide
Other Languages:
German:Cuprojodid
Kupferjodür
Marshit
Russian:Маршит
Spanish:Marshita
Varieties:
Cupro-iodargyrite

Other Information

Fluorescence in UV light:Frequently fluorescent red in both SW and LW
Health Warning: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 (1892) Proceedings of the Royal Society of New South Wales: 26: 326-332 (as Native copper iodide).

Liversidge (1892) Proceedings of the Royal Society of New South Wales: 26: 328 (as Marshite).

Miers (1894) Zs. Kr.: 24: 207.

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

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

Jarrell (1939) American Mineralogist: 24: 629.

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: Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 20-22.

Canadian Mineralogist (1997): 35: 785-786.

Mineralogical Magazine: 13: 186-190.

Mineralogical Magazine: 62: 471-475.

Internet Links for Marshite

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  • Marshite details from Handbook of Mineralogy (PDF)
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    • Specimens:The following Marshite specimens are currently listed for sale on minfind.com.
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    • Localities for Marshite

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? 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.
    Marsh (1892) Proceedings of the Royal Society of New South Wales: 26: 326-332 (as Native copper iodide).
    Rocks & Min.:62:224-225.
    Rob Lavinsky
    Australian Min. 3:1 (1997)
    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.
    • 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
    		[var: Cupro-iodargyrite] Palache et al (1944), Dana's System of Mineralogy, seventh ed., vol. II: 22.
    Germany
     
    • Rhineland-Palatinate
      • Lahn valley
        • Bad Ems District
          • Frücht
    		[var: Cupro-iodargyrite] 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.
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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