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Miersite

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Sir Henry A. Miers
Formula:
(Ag,Cu)I
Colour:
Yellow
Lustre:
Adamantine
Hardness:
2½ - 3
Specific Gravity:
5.64
Crystal System:
Isometric
Name:
After Henry A. Miers (1858-1942), Professor of Mineralogy, Oxford, England.
Hide all sections | Show all sections

Classification of MiersiteHide

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.
9.1.7.2

9 : NORMAL HALIDES
1 : AX
8.3.5

8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
3 : Halides of Ag

Physical Properties of MiersiteHide

Adamantine
Transparency:
Transparent
Colour:
Yellow
Streak:
Yellow
Hardness:
2½ - 3 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
On {011}.
Fracture:
Conchoidal
Density:
5.64 g/cm3 (Measured)    5.67 g/cm3 (Calculated)

Chemical Properties of MiersiteHide

Formula:
(Ag,Cu)I

Crystallography of MiersiteHide

Crystal System:
Isometric
Class (H-M):
4 3m - Hextetrahedral
Space Group:
F4 3m
Cell Parameters:
a = 6.5 Å
Unit Cell V:
274.63 ų (Calculated from Unit Cell)
Morphology:
Tetrahedral, often with small faces of {01}; cubo-octahedral rare by equal development of {001}, {111}, and {111}. {001} striated parallel to the edges with the tetrahedral faces. o differences exhibited by the positive and negative tetrahedra. Crusts; aggregates of indistinct crystals.
Twinning:
On {011}, repeated at times.

Epitaxial Relationships of MiersiteHide

Epitaxial Minerals:
Epitaxy Comments:
Oriented intergrowths with iodargyrite.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.72 (w)
3.23 (s)
2.28 (m)
1.948 (m)
1.489 (vw)
1.320 (vw)
1.290 (vw)

Type Occurrence of MiersiteHide

Other Language Names for MiersiteHide

German:Miersit
Spanish:Miersita

Relationship of Miersite to other SpeciesHide

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

Common AssociatesHide

Associated Minerals Based on Photo Data:
Cuprite25 photos of Miersite associated with Cuprite on mindat.org.
Azurite22 photos of Miersite associated with Azurite on mindat.org.
Malachite11 photos of Miersite associated with Malachite on mindat.org.
Silver9 photos of Miersite associated with Silver on mindat.org.
Cerussite8 photos of Miersite associated with Cerussite on mindat.org.
Chenevixite4 photos of Miersite associated with Chenevixite on mindat.org.
Serpierite2 photos of Miersite associated with Serpierite on mindat.org.
Lindgrenite1 photo of Miersite associated with Lindgrenite on mindat.org.
Copper1 photo of Miersite associated with Copper on mindat.org.
Marshite1 photo of Miersite associated with Marshite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

3.AA.05MarshiteCuIIso. 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
9.1.7.3MarshiteCuIIso. 4 3m : F4 3m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

8.3.1ChlorargyriteAgClIso. m3m (4/m 3 2/m) : Fm3m
8.3.2BromargyriteAgBrIso. m3m (4/m 3 2/m) : Fm3m
8.3.3Bromian ChlorargyriteAg(Cl,Br)
8.3.4IodargyriteAgIHex. 6mm : P6mm

Fluorescence of MiersiteHide

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 MiersiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Spencer, L.J. (1898) Miersite, a cubic modification of native silver iodide. Nature: 57: 574-574.
Spencer, L.J. (1901) Marshite, Miersite and Iodyrite from Broken Hill, New South Wales. Mineralogical Magazine: 13: 38-53.
Prior, G.T. (1902) The identity of kilbrickenite with geocronite: And analyses of miersite, marshite, and copper-pyrites. Mineralogical Magazine: 13: 186-190.
Quercigh (1914) Acc. Linc., Rend.: 23: 441, 711, 825.
Aminoff (1922), Geol. För. Förh.: 44: 444.
Barth and Lunde (1926) Zs. phys. Chem.: 122: 293.
Kolkmeijer and van Hengel (1934) Zeitschrift für Kristallographie: 88: 317.
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: 19-20.
Burns, G., Dacol, F.H., Shafer, M.W. (1977) Results from Raman spectra of the superionic conductor AgI. Physical Review B: 16: 1416-1425.
Millsteed, P.W. (1998) Marshite-miersite solid solution and iodargyrite from Broken Hill, New South Wales, Australia. Mineralogical Magazine: 62: 471-475.
Hull, S., Keen, D.A. (1999) Pressure-induced phase transitions in AgCl, AgBr, and AgI. Physical Review B: 59: 750-761.
Philosophical Magazine: 42: 262-263.

Internet Links for MiersiteHide

Localities for MiersiteHide

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 (TL)
 
  • New South Wales
    • Yancowinna Co.
Nature (1896) 57, 574
South Australian Museum specimen in the collection of Brent Thorne
        • Broken Hill South Mine (BHS Mine; South Mine)
Nature (1896) 57, 574
Chile
 
  • Antofagasta Region
    • El Loa Province
      • Calama
        • Chuquicamata District
Miersite - xray identification by Willard Roberts SDSM Aug/77.
Mexico
 
  • Sonora
    • Mun. de Moctezuma
Lapis 2001(1), 11-40
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.
Gunnar Farber
Spain
 
  • Andalusia
    • Almería
      • Níjar
        • Rodalquilar
Christian Rewitzer et.al. (2014) Rodalquilar bei Almeria: Goldbergbau in Andalusien. LAPIS 6.2014 p. 12-29
USA
 
  • Arizona
    • Cochise Co.
      • Mule Mts
        • Warren District
[MinRec 24:421]
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 298; Graeme, R. (1993), Bisbee revisited, Min.Rec.: 24: 421-436.
    • Pima Co.
      • Tohono O'odom (Papago) Indian Reservation
        • Comobabi Mts
          • Cababi District (Comobabi District)
            • Ko Vaya
              • Mildren Mine group
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 298; Williams, S.A, (1963), Oxidation of sulfide ores in the Mildren and Steppe mining districts, Pima Co., AZ, Econ.Geol.: 58: 1119-1125.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 298; Williams, S.A, (1963), Oxidation of sulfide ores in the Mildren and Steppe mining districts, Pima Co., AZ, Econ.Geol.: 58: 1119-1125.
Mineral and/or Locality  
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