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Ungemachite

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About UngemachiteHide

Henri-Léon Ungemach
Formula:
K3Na8Fe(SO4)6(NO3)2 · 6H2O
Colour:
Colourless, pale yellow; colourless in transmitted light.
Lustre:
Vitreous
Hardness:
Specific Gravity:
2.287
Crystal System:
Trigonal
Name:
Named after Henri-Léon Ungemach (1880-1936), Belgian crystallographer.

Classification of UngemachiteHide

Approved, 'Grandfathered' (first described prior to 1959)
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
32.2.3.1

32 : COMPOUND SULFATES
2 : Hydrated Compound Sulfates
25.11.11

25 : Sulphates
11 : Sulphates of Fe and other metals

Physical Properties of UngemachiteHide

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

Optical Data of UngemachiteHide

Type:
Uniaxial (-)
RI values:
nω = 1.502() nε = 1.449(2)
Max Birefringence:
δ = 0.053
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of UngemachiteHide

Formula:
K3Na8Fe(SO4)6(NO3)2 · 6H2O
IMA Formula:
K3Na8Fe3+(SO4)6(NO3)2 · 6H2O

Crystallography of UngemachiteHide

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 V:
2,570.24 ų (Calculated from Unit Cell)
Z:
3
Morphology:
Crystals thick tabular {0001}.

Type Occurrence of UngemachiteHide

Place of Conservation of Type Material:
Harvard University, Boston, Massachusetts 98282, 98283
Geological Setting of Type Material:
Oxidized copper ore body in an arid region.
Associated Minerals at Type Locality:

Other Language Names for UngemachiteHide

German:Ungemachit
Simplified Chinese: 菱碱铁矾
Spanish:Ungemachita

Common AssociatesHide

Associated Minerals Based on Photo Data:
Sideronatrite1 photo of Ungemachite associated with Sideronatrite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

7.DG.05DarapskiteNa3(SO4)(NO3) · H2OMon. 2/m
7.DG.10Clinoungemachite(Na, K, Fe, SO4)Mon. 2/m
7.DG.10HumberstoniteNa7K3Mg2(SO4)6(NO3)2 · 6H2OTrig. 3 : R3
7.DG.15BentoriteCa6(Cr3+,Al)2(SO4)3(OH)12 · 26H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
7.DG.15CharlesiteCa6(Al,Si)2(SO4)2[B(OH)4](OH,O)12 · 26H2OTrig. 3m : P3 1c
7.DG.15EttringiteCa6Al2(SO4)3(OH)12 · 26H2OTrig. 3m : P3 1c
7.DG.15JouravskiteCa3Mn4+(SO4)(CO3)(OH)6 · 12H2OHex.
7.DG.15SturmaniteCa6(Fe3+,Al,Mn3+)2(SO4)2[B(OH)4](OH)12 · 25H2OTrig. 3m : P3 1c
7.DG.15ThaumasiteCa3(SO4)[Si(OH)6](CO3) · 12H2OHex. 6 : P63
7.DG.15CarraraiteCa3(SO4)[Ge(OH)6](CO3) · 12H2OHex.
7.DG.15BuryatiteCa3(Si,Fe,Al)(SO4)[B(OH)4]O(OH)5 · 12H2O
7.DG.20RapidcreekiteCa2(SO4)(CO3) · 4H2OOrth.
7.DG.20KorkinoiteCa4(SO4)2(CO3)2 · 9(H2O)Orth. mmm (2/m 2/m 2/m) : Pmmm
7.DG.25TatarskiteCa6Mg2(SO4)2(CO3)2(OH)4Cl4 · 7H2OOrth.
7.DG.30NakauriiteCu8(SO4)4(CO3)(OH)6 · 48H2OOrth.
7.DG.35Chessexite(Na,K)4Ca2(Mg,Zn)3Al8(SO4)10(SiO4)2 · 40H2OOrth.
7.DG.40CarlosruiziteK6(Na,K)4Na6Mg10(SeO4)12(IO3)12 · 12H2OTrig. 3m (3 2/m) : P3c1
7.DG.40FuenzalidaiteK6(Na,K)4Na6Mg10(SO4)12(IO3)12 · 12H2OTrig. 3m (3 2/m) : P3c1
7.DG.45Chelyabinskite(Ca,Mg)3(SO4,CO3)2[Si(OH)6] · 9H2O (?)Orth.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

25.11.1NatrojarositeNaFe3(SO4)2(OH)6Trig. 3m : R3m
25.11.2SideronatriteNa2Fe(SO4)2(OH) · 3H2OOrth. 2 2 2 : P21 21 21
25.11.3MetasideronatriteNa2Fe(SO4)2(OH) · H2OOrth. mmm (2/m 2/m 2/m)
25.11.4FerrinatriteNa3Fe(SO4)3 · 3H2OTrig. 3 : P3
25.11.5AmarilliteNaFe(SO4)2 · 6H2OMon. 2/m : B2/b
25.11.6YavapaiiteKFe(SO4)2Mon. 2/m : B2/m
25.11.7KrausiteKFe(SO4)2 · H2OMon. 2/m : P21/m
25.11.8GoldichiteKFe(SO4)2 · 4H2OMon. 2/m : P21/b
25.11.9JarositeKFe3+ 3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
25.11.10VoltaiteK2Fe2+5Fe3+3Al(SO4)12 · 18H2OIso. m3m (4/m 3 2/m) : Fd3c
25.11.12MetavoltineNa6K2FeFe6(SO4)12O2 · 18H2OTrig.
25.11.13Sabieite(NH4)Fe3+(SO4)2Trig. 3 2 : P3 2 1
25.11.14Ammoniojarosite(NH4)Fe3+3(SO4)2(OH)6Trig. 3m : R3m
25.11.15Clairite(NH4)2Fe3(SO4)4(OH)3 · 3H2OTric.
25.11.16Mohrite(NH4)2Fe(SO4)2 · 6H2OMon. 2/m : P21/b
25.11.17Lonecreekite(NH4)Fe3+(SO4)2 · 12H2OIso.
25.11.18Godovikovite(NH4)Al(SO4)2Trig. 3 2 : P3 2 1
25.11.19BotryogenMgFe3+(SO4)2(OH) · 7H2OMon. 2/m
25.11.21Slavíkite(H3O+)3Mg6Fe15(SO4)21(OH)18 · 98H2OTrig. 3 : R3
25.11.23SturmaniteCa6(Fe3+,Al,Mn3+)2(SO4)2[B(OH)4](OH)12 · 25H2OTrig. 3m : P3 1c
25.11.24Millosevichite(Al,Fe)2(SO4)3Trig. 3 : R3
25.11.25AluminocopiapiteAl2/3Fe3+4(SO4)6(OH)2 · 20H2OTric. 1 : P1
25.11.26HalotrichiteFeAl2(SO4)4 · 22H2OMon. 2 : P2
25.11.27Idrizite(Mg,Fe)(Al,Fe)2(SO4)3(OH)2 · 15H2O or near
25.11.28LishizheniteZnFe2(SO4)4 · 14H2OTric. 1 : P1
25.11.29ZincovoltaiteK2Zn5Fe3+3Al(SO4)12 · 18H2OIso. m3m (4/m 3 2/m) : Fd3c

Other InformationHide

Notes:
Readily soluble in dilute HCl.
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 UngemachiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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.
Jentzsch, P.V., Ciobota, V., Bolanz, R.M., Kampe, B., Rösch, P., Majzlan, J., Popp, J. (2012): Raman and infrared spectroscopic study of synthetic ungemachite, K3Na8Fe(SO4)6(NO3)2·6H2O. Journal of Molecular Structure 1022, 147-152.

Internet Links for UngemachiteHide

Localities for UngemachiteHide

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
 
  • New South Wales
    • Robinson Co.
      • Cobar
Leverett, P., McKinnon, A.R., Williams, P.A. (2003) Mineralogy of the oxidised zone at the New Cobar orebody. Advances in Regolith. CRC LEME, Bentley, 267-270.
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 (TL)
 
  • Antofagasta Region
    • El Loa Province
      • Calama
        • Chuquicamata District
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  
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