Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (7 online) Mindat Auctions

Ungemachite

Big Photo

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

Formula:
K
 
3
Na
 
8
Fe(SO
 
4
)
 
6
(NO
 
3
)
 
2
·6H
 
2
O
System:TrigonalColour:Colourless, pale yellow; ...
Lustre:VitreousHardness:2½
Name:Named after Henri-Léon Ungemach (1880-1936), Belgian crystallographer.


Ungemachite Group

Classification of Ungemachite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:6/D.16-20
Nickel-Strunz 10th (pending) edition ID:7.DG.10

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
G : With large and medium-sized cations; with NO3, CO3, B(OH)4, SiO4 or IO3
Dana 8th edition ID:32.2.3.1

32 : COMPOUND SULFATES
2 : Hydrated Compound Sulfates
Hey's CIM Ref.:25.11.11

25 : Sulphates
11 : Sulphates of Fe and other metals
mindat.org URL:http://www.mindat.org/min-4095.html
Please feel free to link to this page.

Type Occurrence of Ungemachite

Type Locality:Chuquicamata Mine, Calama, El Loa Province, Antofagasta Region, Chile
Place of Conservation of Type Material:Harvard University, Boston, Massachusetts 98282, 98283
Year of Discovery:1936
Geological Setting of type material:Oxidized copper ore body in an arid region.
Associated Minerals at type locality:
MetasideronatriteJarosite

Occurrences of Ungemachite

Geological Setting:Oxidation zone for pyrites in arid environment.

Physical Properties of Ungemachite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:Colourless, pale yellow; colourless in transmitted light.
Hardness (Mohs):2½
Tenacity:Brittle
Cleavage:Perfect
Perfect on {0001}
Fracture:Irregular/Uneven
Density (measured):2.287(3) g/cm3
Density (calculated):2.259 g/cm3

Crystallography of Ungemachite

Crystal System:Trigonal
Class (H-M):3 - Rhombohedral
Space Group:R3
Cell Parameters:a = 10.898(1) Å, c = 24.989(6) Å
Ratio:a:c = 1 : 2.293
Unit Cell Volume:V 2,570.24 ų (Calculated from Unit Cell)
Z:3
Morphology:Crystals thick tabular {0001}.

Optical Data of Ungemachite

Type:Uniaxial (-)
RI values: nω = 1.502() nε = 1.449(2)
Maximum Birefringence:δ = 0.053

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate

Chemical Properties of Ungemachite

Formula:
K
 
3
Na
 
8
Fe(SO
 
4
)
 
6
(NO
 
3
)
 
2
·6H
 
2
O
Essential elements:Fe, H, K, N, Na, O, S
All elements listed in formula:Fe, H, K, N, Na, O, S
Empirical Formula:
K
 
3
Na
 
8
Fe
3+
 
(SO
 
4
)
 
6
(NO
 
3
)
 
2
·6H
 
2
O

Relationship of Ungemachite to other Species

Related Minerals - Nickel-Strunz Grouping):
7.DG.05Darapskite
Na
 
3
NO
 
3
SO
 
4
·H
 
2
O
7.DG.10Clinoungemachite
(Na, K, Fe, SO
 
4
)
7.DG.10Humberstonite
Na
 
7
K
 
3
Mg
 
2
(SO
 
4
)
 
6
(NO
 
3
)
 
2
·6H
 
2
O
7.DG.15Bentorite
Ca
 
6
(Cr
3+
 
,Al)
 
2
[(OH)
 
4
|SO
 
4
]
 
3
 · 26H
 
2
O
7.DG.15Charlesite
Ca
 
6
(Al,Si)
 
2
[(OH,O)
 
12
|B(OH)
 
4
|(SO
 
4
)
 
2
] · 26H
 
2
O
7.DG.15Ettringite
Ca
 
6
Al
 
2
[(OH)
 
4
|SO
 
4
]
 
3
 · 26H
 
2
O
7.DG.15Jouravskite
Ca
 
6
Mn
3+
2
[(OH)
 
4
|(SO
 
4
,CO
 
3
)]
 
3
 · 26H
 
2
O
7.DG.15Sturmanite
Ca
 
6
(Fe
3+
 
,Al,Mn
3+
 
)
 
2
[(OH)
 
12
|B(OH)
 
4
|(SO
 
4
)
 
2
] · 25H
 
2
O
7.DG.15Thaumasite
Ca
 
3
[CO
 
3
|SO
 
4
|Si(OH)
 
6
] · 12H
 
2
O
7.DG.15Carraraite
Ca
 
3
Ge(OH)
 
6
(SO
 
4
)(CO
 
3
)·12H
 
2
O
7.DG.15Buryatite
Ca
 
3
(Si,Fe,Al)[SO
 
4
][B(OH)
 
4
](OH)
 
5
O•
 
12
H
 
2
O
7.DG.15Korkinoite
7.DG.20Rapidcreekite
Ca
 
2
[CO
 
3
|SO
 
4
] · 4H
 
2
O
7.DG.25Tatarskite
Ca
 
6
Mg
 
2
(SO
 
4
)
 
2
(CO
 
3
)
 
2
Cl
 
4
(OH)
 
4
·7H
 
2
O
7.DG.25Chelyabinskite
(Ca,Mg)
 
3
[(SO
 
4
,CO
 
3
)
 
2
|Si(OH)
 
6
] · 9H
 
2
O (?)
7.DG.30Nakauriite
Cu
 
8
[(OH)
 
6
|CO
 
3
|(SO
 
4
)
 
4
] · 48H
 
2
O
7.DG.35Chessexite
(Na,K)
 
4
Ca
 
2
(Mg,Zn)
 
3
Al
 
8
[(SO
 
4
)
 
10
|(SiO
 
4
)
 
2
] · 40H
 
2
O
7.DG.40Carlosruizite
K
 
6
(Na,K)
 
4
Na
 
6
Mg
 
10
(SeO
 
4
)
 
12
(IO
 
3
)
 
12
·12H
 
2
O
7.DG.40Fuenzalidaite
K
 
6
(Na,K)
 
4
Na
 
6
Mg
 
10
(SO
 
4
)
 
12
(IO
 
3
)
 
12
·12H
 
2
O
Related Minerals - Hey's Index Grouping:
25.11.1Natrojarosite
NaFe
 
3
[(OH)
 
3
|SO
 
4
]
 
2
25.11.2Sideronatrite
Na
 
2
Fe(SO
 
4
)
 
2
OH·3H
 
2
O
25.11.3Metasideronatrite
Na
 
4
Fe
 
2
(SO
 
4
)
 
4
(OH)
 
2
·2H
 
2
O
25.11.4Ferrinatrite
Na
 
3
Fe(SO
 
4
)
 
3
·3H
 
2
O
25.11.5Amarillite
NaFe(SO
 
4
)
 
2
·6H
 
2
O
25.11.6Yavapaiite
KFe(SO
 
4
)
 
2
25.11.7Krausite
KFe(SO
 
4
)
 
2
·H
 
2
O
25.11.8Goldichite
KFe(SO
 
4
)
 
2
·4H
 
2
O
25.11.9Jarosite
KFe
3+
 
 
3
[(OH)
 
3
|SO
 
4
]
 
2
25.11.10Voltaite
K
 
2
Fe
2+
5
Fe
3+
3
Al[SO
 
4
]
 
12
 · 18H
 
2
O
25.11.12Metavoltine
Na
 
6
K
 
2
FeFe
 
6
(SO
 
4
)
 
12
O
 
2
·18H
 
2
O
25.11.13Sabieite
NH
 
4
Fe(SO
 
4
)
 
2
25.11.14Ammoniojarosite
(NH
 
4
)Fe
3+
3
[(OH)
 
3
|SO
 
4
]
 
2
25.11.15Clairite
(NH
 
4
)
 
2
Fe
 
3
(SO
 
4
)
 
4
(OH)
 
3
·3H
 
2
O
25.11.16Mohrite
(NH
 
4
)
 
2
Fe(SO
 
4
)
 
2
·6H
 
2
O
25.11.17Lonecreekite
(NH
 
4
)Fe
3+
 
[SO
 
4
]
 
2
 · 12H
 
2
O
25.11.18Godovikovite
NH
 
4
(Al,Fe)(SO
 
4
)
 
2
25.11.19Botryogen
MgFe
3+
 
[OH|(SO
 
4
)
 
2
] · 7H
 
2
O
25.11.21Slavíkite
NaMg
 
2
Fe
 
5
(SO
 
4
)
 
7
(OH)
 
6
·33H
 
2
O
25.11.23Sturmanite
Ca
 
6
(Fe
3+
 
,Al,Mn
3+
 
)
 
2
[(OH)
 
12
|B(OH)
 
4
|(SO
 
4
)
 
2
] · 25H
 
2
O
25.11.24Millosevichite
(Al,Fe)
 
2
(SO
 
4
)
 
3
25.11.25Aluminocopiapite
Al
 
2/3
Fe
3+
4
[OH|(SO
 
4
)
 
3
]
 
2
 · 20H
 
2
O
25.11.26Halotrichite
FeAl
 
2
(SO
 
4
)
 
4
·22H
 
2
O
25.11.27Idrizite
(Mg,Fe)(Al,Fe)
 
2
(SO
 
4
)
 
3
(OH)
 
2
·15H
 
2
O or near
25.11.28Lishizhenite
ZnFe
 
2
(SO
 
4
)
 
4
·14H
 
2
O
25.11.29Zincovoltaite
K
 
2
Zn
 
5
Fe
3+
3
Al[SO
 
4
]
 
12
 · 18H
 
2
O

Other Names for Ungemachite

German names:
Ungemachit
Russian names:
Унгемахит
Spanish names:
Ungemachita

Other Information

Other Information:Readily soluble in dilute HCl.
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 Ungemachite

Reference List:American Mineralogist (1936): 21/12: part 2, 2.

Peacock, M. A. & Bandy, M. C. (1938): Ungemachite and clino-ungemachite: new minerals from Chile. American Mineralogist: 23: 314-328.

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.: 596.

American Mineralogist (1986): 71: 826-829.

Internet Links for Ungemachite

Search Engines:
  • Look for Ungemachite on Google
  • Look for Ungemachite images on Google
    • External Links:
  • Look for Ungemachite on Webmineral
  • Look for Ungemachite on Athena Mineralogy
  • Look for Ungemachite on Wikipedia
  • Look for Ungemachite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Ungemachite in the Natural History Museum (London) online catalogue
  • Ungemachite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • e-Rocks - Mineral Auctions and Sales
  • Buy Minerals and Crystals from Crystalarium.com
  • Lapis Mineral Magazin
  • High-end worldwide specimens & outstanding customer service
  • The Arkenstone - Fine Minerals
  • Buy fine minerals and gemstones from Pala International
  • Buy from David K Joyce minerals
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Wilensky Fine Minerals
  • rare and unusual minerals mainly crystallized
  • Fine Minerals from Dan Weinrich Minerals
  • Wright's Rock Shop - excellent mineral specimens since 1970
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to find out how you can sponsor this page.

    Localities for Ungemachite

    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
     
    • New South Wales
      • Robinson Co.
        • Cobar
          • Cobar
    		http://leme.anu.edu.au/Pubs/Advancesinregolith/Leverett_et_al.pdf
          • Kaloogleguy
    		Leverett, P., McKinnon, A. R., Sharpe, J. L. and Williams, P. A. (2005): Secondary minerals from the central Cobar mines. Australian Journal of Mineralogy, 11, 75-82.
    Chile
     
    • Antofagasta Region
      • El Loa Province
        • Calama
    		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: 597; American Mineralogist (1936): 21(12): part 2, p.2; Mineralogical Record: 9: 329.
    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.