Ungemachite
A valid IMA mineral species - grandfathered
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About Ungemachite
Henri-Léon Ungemach
Formula:
K3Na8Fe(SO4)6(NO3)2 · 6H2O
Colour:
Colourless, pale yellow; colourless in transmitted light.
Lustre:
Vitreous
Hardness:
2½
Specific Gravity:
2.287
Crystal System:
Trigonal
Name:
Named after Henri-Léon Ungemach (Strasbourg, September 10 1879 - June 11 1936), French crystallographer. He was educated at the Polytechnic School of Zurich as a chemical engineer, where he graduated in 1907 with a thesis on the mineral veins in the Weilerthal. After his death, the bulk of his collection was aquired by the university of Liège. This collection had supplied him with material for his crystallographic studies.
This page provides mineralogical data about Ungemachite.
Unique Identifiers
Mindat ID:
4095
Long-form identifier:
mindat:1:1:4095:8
GUID
(UUID V4):
(UUID V4):
59c62a05-b329-49a2-92bf-df651f4928ac
IMA Classification of Ungemachite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
K3Na8Fe3+(SO4)6(NO3)2 · 6H2O
Classification of Ungemachite
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
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
32 : COMPOUND SULFATES
2 : Hydrated Compound Sulfates
25.11.11
25 : Sulphates
11 : Sulphates of Fe and other metals
25 : Sulphates
11 : Sulphates of Fe and other metals
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Ugm | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Ungemachite
Vitreous
Transparency:
Transparent
Colour:
Colourless, pale yellow; colourless in transmitted light.
Streak:
White
Hardness:
2½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
Perfect on {0001}
Perfect on {0001}
Fracture:
Irregular/Uneven
Density:
2.287(3) g/cm3 (Measured) 2.259 g/cm3 (Calculated)
Optical Data of Ungemachite
Type:
Uniaxial (-)
RI values:
nω = 1.502(2) 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.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Chemistry of Ungemachite
Mindat Formula:
K3Na8Fe(SO4)6(NO3)2 · 6H2O
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 V:
2,570.24 ų (Calculated from Unit Cell)
Z:
3
Morphology:
Crystals thick tabular {0001}.
Forms include {0001}, {1011}, {0112}, {1123}, {1014}, and many others.
Forms include {0001}, {1011}, {0112}, {1123}, {1014}, and many others.
Crystal Structure
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Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0001035 | Ungemachite | Groat L A, Hawthorne F C (1986) Structure of ungemachite, K3Na8Fe(SO4)6(NO3)2.6H2O, a mixed sulfate-nitrate mineral Note U(1,2) for N and Na1 have been altered to match symmetry constraints. American Mineralogist 71 826-829 |  | 1986 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.43 Å | (100) |
| 8.33 Å | (60) |
| 2.72 Å | (55) |
| 2.59 Å | (35) |
| 8.82 Å | (30) |
| 7.55 Å | (30) |
| 1.880 Å | (25) |
Comments:
Chuquicamata, Chile. ICDD 20-1326.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47b : [Sulfates and sulfites] | |
| 47c : [Carbonates, phosphates, borates, nitrates] |
Geological Setting:
Oxidation zone for pyrites in arid environment.
Type Occurrence of Ungemachite
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 Ungemachite
Common Associates
Associated Minerals Based on Photo Data:
| 1 photo of Ungemachite associated with Sideronatrite | Na2Fe(SO4)2(OH) · 3H2O |
Related Minerals - Strunz-mindat Grouping
| 7.DG. | Mathesiusite | K5(UO2)4(SO4)4(VO5) · 4H2O |
| 7.DG.05 | Darapskite | Na3(SO4)(NO3) · H2O |
| 7.DG.10 | Clinoungemachite | (Na, K, Fe, SO4) |
| 7.DG.10 | Humberstonite | Na7K3Mg2(SO4)6(NO3)2 · 6H2O |
| 7.DG.15 | Bentorite | Ca6Cr2(SO4)3(OH)12 · 26H2O |
| 7.DG.15 | Charlesite | Ca6(Al,Si)2(SO4)2[B(OH)4](OH,O)12 · 26H2O |
| 7.DG.15 | Ettringite | Ca6Al2(SO4)3(OH)12 · 26H2O |
| 7.DG.15 | Jouravskite | Ca3Mn4+(SO4)(CO3)(OH)6 · 12H2O |
| 7.DG.15 | Sturmanite | Ca6Fe3+2(SO4)2.5[B(OH)4](OH)12 · 25H2O |
| 7.DG.15 | Thaumasite | Ca3(SO4)[Si(OH)6](CO3) · 12H2O |
| 7.DG.15 | Carraraite | Ca3(SO4)[Ge(OH)6](CO3) · 12H2O |
| 7.DG.15 | Buryatite | Ca3(Si,Fe3+,Al)(SO4)B(OH)4(OH,O)6 · 12H2O |
| 7.DG.15 | Birunite | Ca18(SiO3)8.5(CO3)8.5SO4 · 15H2O(?) |
| 7.DG.15 | Hielscherite | Ca3Si(SO4)(SO3)(OH)6 · 11H2O |
| 7.DG.15 | Kottenheimite | Ca 3Si(SO4)2(OH)6 · 12H2O |
| 7.DG.15 | Imayoshiite | Ca3Al(CO3)[B(OH)4](OH)6 · 12H2O |
| 7.DG.15 | Tatarinovite | Ca3Al(SO4)[B(OH)4](OH)6 · 12H2O |
| 7.DG.15 | Siwaqaite | Ca6Al2(CrO4)3(OH)12 · 26H2O |
| 7.DG.15 | Chiyokoite | Ca3Si(CO3)[B(OH)4]O (OH)5 · 12H2O |
| 7.DG.20 | Rapidcreekite | Ca2(SO4)(CO3) · 4H2O |
| 7.DG.25 | Tatarskite | Ca6Mg2(SO4)2(CO3)2(OH)4Cl4 · 7H2O |
| 7.DG.30 | Nakauriite | Cu8(SO4)4(CO3)(OH)6 · 48H2O |
| 7.DG.35 | Chessexite | (Na,K)4Ca2(Mg,Zn)3Al8(SO4)10(SiO4)2 · 40H2O |
| 7.DG.40 | Carlosruizite | K6(Na,K)4Na6Mg10(SeO4)12(IO3)12 · 12H2O |
| 7.DG.40 | Fuenzalidaite | K6(Na,K)4Na6Mg10(SO4)12(IO3)12 · 12H2O |
| 7.DG.45 | Chelyabinskite | (Ca,Mg)3(SO4,CO3)2[Si(OH)6] · 9H2O (?) |
| 7.DG.55 | Ramazzoite | [Mg8Cu12(PO4)(CO3)4(OH)24(H2O)20][(H0.33SO4)3(H2O)36] |
| 7.DG.60 | Witzkeite | Na4K4Ca(NO3)2(SO4)4 · 2H2O |
Other Information
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.
Internet Links for Ungemachite
mindat.org URL:
https://www.mindat.org/min-4095.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
References for Ungemachite
Reference List:
Peacock, M. A., Bandy, M. C. (1936) Ungemachite and clino-ungemachite: new minerals from Chile. American Mineralogist, 21 (12(part2)) 2
Bandy, Mark C. (1938) Mineralogy of three sulphate deposits of northern Chile. American Mineralogist, 23 (11) 669-760
Peacock, M. A., Bandy, M. C. (1938) Ungemachite and clino-ungemachite: new minerals from Chile. American Mineralogist, 23 (5) 314-328
Groat, L. A., Hawthorne, Frank C. (1986) Structure of ungemachite, K3Na8Fe3+(SO4)6(NO3)2·6H2O. American Mineralogist, 71. 826-829
Jentzsch, Paul Vargas, Ciobotă, Valerian, Bolanz, Ralph Michael, Kampe, Bernd, Rösch, Petra, Majzlan, Juraj, Popp, Jürgen (2012) Raman and infrared spectroscopic study of synthetic ungemachite, K3Na8Fe(SO4)6(NO3)2·6H2O. Journal of Molecular Structure, 1022. 147-152 doi:10.1016/j.molstruc.2012.05.024
Localities for Ungemachite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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).
All localities listed without proper references should be considered as questionable.
Australia | |
| Leverett et al. (2003) |
| Leverett et al. (2005) | |
Chile (TL) | |
| Mineralogical Record: 9: 329. +3 other references |
USA | |
| Livingston et al. (2005, December) |
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Chuquicamata Mine, Chuquicamata District, Calama, El Loa Province, Antofagasta, Chile