Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (6 online) Mindat Auctions

Metahohmannite

Big Photo

Queténa Mine, Calama, El Loa Province, Antofagasta Region, Chile
© 2008, J. Weissman

Formula:
Fe
3+
2
[O|(SO
 
4
)
 
2
] · 4H
 
2
O
Colour:Orange


Pulverulent masses formed by the partial dehydration of hohmannite.

Classification of Metahohmannite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:6/D.01-35
Nickel-Strunz 10th (pending) edition ID:7.DB.30

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
B : With only medium-sized cations; insular octahedra and finite units
Dana 8th edition ID:31.9.5.1

31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
9 : (AB)(XO4)Zq·xH2O
Hey's CIM Ref.:25.10.13

25 : Sulphates
10 : Sulphates of Fe alone
mindat.org URL:http://www.mindat.org/min-2675.html
Please feel free to link to this page.

Type Occurrence of Metahohmannite

Type Locality:Chuquicamata Mine, Calama, El Loa Province, Antofagasta Region, Chile
Year of Discovery:1938

Physical Properties of Metahohmannite

Colour:Orange

Crystallography of Metahohmannite

Morphology:Pulverulent masses.

Optical Data of Metahohmannite

Type:Biaxial (+)
RI values: nα = 1.709 nβ = 1.718 nγ = 1.734
2V:Measured: 70° , Calculated: 76°
Maximum Birefringence:δ = 0.025

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:r > v weak
Pleochroism:Visible
Comments:X = Light yellow
Y = Reddish yellow
Z = Reddish brown

Chemical Properties of Metahohmannite

Formula:
Fe
3+
2
[O|(SO
 
4
)
 
2
] · 4H
 
2
O
Essential elements:Fe, H, O, S
All elements listed in formula:Fe, H, O, S

Relationship of Metahohmannite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
7.DB.05Aubertite
CuAl[Cl|(SO
 
4
)
 
2
] · 14H
 
2
O
7.DB.05Magnesioaubertite
(Mg,Cu)Al[Cl|(SO
 
4
)
 
2
] · 14H
 
2
O
7.DB.05Svyazhinite
(Mg,Mn
2+
 
,Ca)(Al,Fe
3+
 
)[F|(SO
 
4
)
 
2
] · 14H
 
2
O
7.DB.05Wilcoxite
MgAl[F|(SO
 
4
)
 
2
] · 18H
 
2
O
7.DB.10Khademite
Al[F|SO
 
4
] · 5H
 
2
O
7.DB.10Rostite
Al[OH|SO
 
4
] · 5H
 
2
O
7.DB.15Jurbanite
Al[OH|SO
 
4
] · 5H
 
2
O
7.DB.20Minasragrite
(V
4+
 
O)[SO
 
4
] · 5H
 
2
O
7.DB.20Orthominasragrite
(V
4+
 
O)[SO
 
4
] · 5H
 
2
O
7.DB.20Anorthominasragrite
(V
4+
 
O)[SO
 
4
] · 5H
 
2
O
7.DB.25Stanleyite
(V
4+
 
O)[SO
 
4
] · 6H
 
2
O
7.DB.25Bobjonesite
(V
4+
 
O)[SO
 
4
] · 3H
 
2
O
7.DB.30Amarantite
Fe
3+
2
[O|(SO
 
4
)
 
2
] · 7H
 
2
O
7.DB.30Hohmannite
Fe
3+
2
[O|(SO
 
4
)
 
2
] · 8H
 
2
O
7.DB.35Aluminocopiapite
Al
 
2/3
Fe
3+
4
[OH|(SO
 
4
)
 
3
]
 
2
 · 20H
 
2
O
7.DB.35Calciocopiapite
CaFe
 
4
(SO
 
4
)
 
6
(OH)
 
2
·10H
 
2
O
7.DB.35Copiapite
Fe
2+
 
Fe
3+
4
[OH|(SO
 
4
)
 
3
]
 
2
 · 20H
 
2
O
7.DB.35Cuprocopiapite
CuFe
 
4
(SO
 
4
)
 
6
(OH)
 
2
·20H
 
2
O
7.DB.35Ferricopiapite
Fe
 
5
(SO
 
4
)
 
6
O(OH)·20H
 
2
O
7.DB.35Magnesiocopiapite
MgFe
3+
4
[OH|(SO
 
4
)
 
3
]
 
2
 · 20H
 
2
O
7.DB.35Zincocopiapite
ZnFe
3+
4
[OH|(SO
 
4
)
 
3
]
 
2
 · 18H
 
2
O
7.DB.40Mcalpineite
Cu
 
3
[TeO
 
6
] · H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
25.10.1Szomolnokite
FeSO
 
4
·H
 
2
O
25.10.2Rozenite
FeSO
 
4
·4H
 
2
O
25.10.3Siderotil
FeSO
 
4
·5H
 
2
O
25.10.4Ferrohexahydrite
FeSO
 
4
·6H
 
2
O
25.10.5Melanterite
FeSO
 
4
·7H
 
2
O
25.10.6Rhomboclase
HFe(SO
 
4
)
 
2
·4H
 
2
O
25.10.7Lausenite
Fe
 
2
(SO
 
4
)
 
3
·6H
 
2
O
25.10.8Kornelite
Fe
 
2
(SO
 
4
)
 
3
·7H
 
2
O
25.10.9Coquimbite
Fe
 
2
(SO
 
4
)
 
3
·9H
 
2
O
25.10.10Paracoquimbite
Fe
 
2
(SO
 
4
)
 
3
·9H
 
2
O
25.10.11Quenstedtite
Fe
 
2
(SO
 
4
)
 
3
·10H
 
2
O
25.10.12Ferricopiapite
Fe
 
5
(SO
 
4
)
 
6
O(OH)·20H
 
2
O
25.10.14Hohmannite
Fe
3+
2
[O|(SO
 
4
)
 
2
] · 8H
 
2
O
25.10.15Butlerite
Fe
3+
 
[OH|SO
 
4
] · 2H
 
2
O
25.10.16Parabutlerite
Fe
3+
 
[OH|SO
 
4
] · 2H
 
2
O
25.10.17Amarantite
Fe
3+
2
[O|(SO
 
4
)
 
2
] · 7H
 
2
O
25.10.18Fibroferrite
Fe
3+
 
[OH|SO
 
4
] · 5H
 
2
O
25.10.19Hydroniumjarosite
(H
 
3
O)Fe
3+
3
(SO
 
4
)
 
2
(OH)
 
6
25.10.20Römerite
Fe
2+
 
Fe
3+
2
(SO
 
4
)
 
4
·14H
 
2
O
25.10.21Bílinite
Fe
2+
 
Fe
3+
2
(SO
 
4
)
 
4
·22H
 
2
O
25.10.22Copiapite
Fe
2+
 
Fe
3+
4
[OH|(SO
 
4
)
 
3
]
 
2
 · 20H
 
2
O

Other Names for Metahohmannite

Other Languages:
German:Metahohmannit
Russian:Метагогманит
Spanish:Metahohmannita

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 Metahohmannite

Reference List:Mackintosh (1889) American Journal of Science: 38: 243 (material may not be identical to metahohmannite).

Bandy (1928) American Mineralogist: 23: 748.

Ungemach (1935) Bulletin de la Société française de Minéralogie: 58: 97.

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. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 608.

Scordari, Fernando, Gennaro Ventruti, and Alessandro F. Gualtieri (2004), The structure of metahohmannite, Fe23+[O(SO4)2].4H2O, by in situ synchrotron, American Mineralogist: 89: 365-370.

Articles/Blogs about Metahohmannite

Internet Links for Metahohmannite

Search Engines:
  • Look for Metahohmannite on Google
  • Look for Metahohmannite images on Google
    • External Links:
  • Look for Metahohmannite on Webmineral
  • Look for Metahohmannite on Athena Mineralogy
  • Look for Metahohmannite on Wikipedia
  • Look for Metahohmannite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Metahohmannite in the Natural History Museum (London) online catalogue
  • Metahohmannite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Buy fine minerals and gemstones from Pala International
  • Search for - Metahohmannite - on e-Rocks Mineral Sales & Auctions
  • Wendel Minerals - Auktion & Shop
  • Fabre Minerals - search for Metahohmannite specimens
  • rare and unusual minerals mainly crystallized
  • Wright's Rock Shop - excellent mineral specimens since 1970
  • Search for Metahohmannite at Thames Valley Minerals
  • Buy Fine Minerals from mineralsweb.com
  • Buy from David K Joyce minerals
  • Find Metahohmannite on www.crystalclassics.co.uk
  • High-end worldwide specimens & outstanding customer service
  • Buy Minerals and Crystals from Crystalarium.com
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to sponsor this page.

    Localities for Metahohmannite

    Hide Locality List
    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.
    These maps work faster with Firefox!
    (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
     
    • South Australia
      • Olary Province
        • Mingary
          • Pine Creek - Mutooroo area
    Chile
     
    • Antofagasta Region
      • El Loa Province
        • Calama
          • Cerritos Bayos
    		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: 608.
    American Mineralogist (1938): 23: 748; 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: 608.
    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: 608.
    • Tarapacá Region
      • Iquique Province
        • Pampa del Tamarugal
    		Peter G. Seroka collection
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon & Ida Ralph 1993-2008. 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. If you would like to add information to improve the quality of our database, then click here to register.