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Marshite

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Broken Hill, Yancowinna Co., New South Wales, Australia
© 2003 ROM

Show Marshite Photos (6)
Formula:
CuI
System:IsometricColour:Colourless to pale ...
Lustre:AdamantineHardness:2½
Name:After Australian C.W. Marsh, who first described the mineral.


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:Adamantine
Diaphaneity (Transparency):Transparent
Colour:Colourless to pale yellow when fresh, turns flesh pink to dark brownish-red.
Streak:Yellow
Hardness (Mohs):2½
Tenacity:Brittle
Cleavage:Perfect
On {011}.
Fracture:Conchoidal
Density (measured):5.68 g/cm3
Density (calculated):5.6 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)
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.

Optical Data of Marshite

Type:Isotropic
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)
Related Minerals - Nickel-Strunz Grouping):

- +
3.AA.05Miersite
(Ag,Cu)I
3.AA.05Nantokite
CuCl
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.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)
 
3
|Cl]
 
2
8.2.6Botallackite
Cu
 
2
[(OH)
 
3
|Cl]
8.2.7Melanothallite
Cu
 
2
[O|Cl
 
2
]
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
[O|Cl
 
10
]

Other Names for Marshite

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

Other Information

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.

Articles/Blogs about Marshite

Internet Links for Marshite

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    Localities for Marshite

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    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.
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    (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.
    No reference listed
    Rocks & Min.:62:224-225.
    Australian Min. 3:1 (1997)
    Chile
     
    • Antofagasta Region
      • El Loa Province
        • Calama
    		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
        • Huantajaya
    		[var: Cupro-iodargyrite] Palache et al (1944), Dana's System of Mineralogy, seventh ed., vol. II: 22.
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