Jungite
A valid IMA mineral species
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About Jungite
Collecting at Bellerberg
Formula:
Ca2Zn4Fe3+8(PO4)9(OH)9 · 16H2O
Colour:
Bright yellow to greenish-yellow (Fleischer and Cabri 1981)
Lustre:
Vitreous, Silky
Hardness:
1
Specific Gravity:
2.843
Crystal System:
Orthorhombic
Name:
Named in 1980 by P.B. Moore and Jun Ito in honor of Dr. Gerhard Jung (19 March 1925 - 14 February 2018, Albbruck, Germany), mineral collector from Albbruck, Germany who first found the mineral.
Indexing of the diffraction data for other crystals from the same specimen consistently gave a triclinic cell, with a ~ 11.95, b = 10.05, c = 9.9 Å, ? ~ 86.7, ? = 89.9, ? ~ 83.4°. which approximates to the Moore and Ito (1980) cell parameters with a halved b parameter. The diffraction patterns for these crystals were complex due to superposition of patterns from differently oriented and twinned components.
Unique Identifiers
Mindat ID:
2122
Long-form identifier:
mindat:1:1:2122:3
Similar Names
| Juanitaite | A valid IMA mineral species | (Cu,Ca,Fe)10Bi(AsO4)4(OH)11 · 2H2O |
| Juanite | A valid IMA mineral species - grandfathered - questionable | Ca10Mg4Al2Si11O39 · 4H2O or near |
| Junitoite | A valid IMA mineral species | CaZn2Si2O7 · H2O |
| Junoite | A valid IMA mineral species | Cu2Pb3Bi8(S,Se)16 |
| Juonniite | A valid IMA mineral species | CaMgSc(PO4)2(OH) · 4H2O |
IMA Classification of Jungite
Approved
IMA Formula:
Ca2Zn24Fe3+8(PO4)9(OH)9·16H2O
Approval year:
1977
First published:
1980
Classification of Jungite
8.DJ.25
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
J : With large and medium-sized cations, (OH, etc.):RO4 = 1:1
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
J : With large and medium-sized cations, (OH, etc.):RO4 = 1:1
42.13.4.1
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
13 : Miscellaneous
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
13 : Miscellaneous
19.6.12
19 : Phosphates
6 : Phosphates of Zn
19 : Phosphates
6 : Phosphates of Zn
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 for Standard |
|---|---|---|
| Jun | 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 Jungite
Vitreous, Silky
Transparency:
Translucent, Opaque
Comment:
Silky in aggregates
Colour:
Bright yellow to greenish-yellow (Fleischer and Cabri 1981)
Streak:
Yellow
Hardness:
1 on Mohs scale
Cleavage:
Perfect
{010}
{010}
Density:
2.843 g/cm3 (Measured) 2.849 g/cm3 (Calculated)
Optical Data of Jungite
Type:
Biaxial (-)
RI values:
nα = 1.658 nβ = 1.658 nγ = 1.664
2V:
Measured: 60°
Max. Birefringence:
δ = 0.006
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Dispersion:
r < v strong
Optical Extinction:
Parallel. X = b; Y = a; Z = c.
Chemistry of Jungite
Mindat Formula:
Ca2Zn4Fe3+8(PO4)9(OH)9 · 16H2O
Element Weights:
Crystallography of Jungite
Crystal System:
Orthorhombic
Class (H-M):
mm2 - Pyramidal
Space Group:
Aba2
Cell Parameters:
a = 11.995(2) Å, b = 24.692(5) Å, c = 9.920(2) Å
Ratio:
a:b:c = 0.486 : 1 : 0.402
Unit Cell V:
2,938.11 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Flakes or as rosettes of thin, sometimes bent, tabular crystals. Forms include {010}, {201}, and {100}.
Comment:
The crystal structure of jungite from the Hagendorf Sud pegmatite, Bavaria, has been determined using synchrotron diffraction data collected at the Australian Synchrotron microfocus beamline MX2.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 9.96 Å | (100b) |
| 5.09 Å | (50) |
| 3.37 Å | (50) |
| 3.30 Å | (50) |
| 3.79 Å | (40) |
| 4.91 Å | (30) |
| 3.08 Å | (30) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 22 : Hydration and low-? subsurface aqueous alteration (see also #23) |
Type Occurrence of Jungite
General Appearance of Type Material:
Rosettes up to 1 cm in diameter of very thin, tabular, bent crystals.
Place of Conservation of Type Material:
No defined type material.
Geological Setting of Type Material:
Late stage mineral in a complex granite pegmatite.
Associated Minerals at Type Locality:
Synonyms of Jungite
Other Language Names for Jungite
Common Associates
Associations Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 8.DJ.05 | Johnwalkite | K(Mn2+,Fe2+,Fe3+)2(Nb5+,Ta5+)(PO4)2O2 · 2(H2O,OH) |
| 8.DJ.05 | Olmsteadite | KFe2+2(Nb5+,Ta5+)(PO4)2O2 · 2H2O |
| 8.DJ.10 | Gatumbaite | CaAl2(PO4)2(OH)2 · H2O |
| 8.DJ.15 | Camgasite | CaMg(AsO4)(OH) · 5H2O |
| 8.DJ.20 | Meurigite-K | KFe3+8(PO4)6(OH)7 · 6.5H2O |
| 8.DJ.20 | Phosphofibrite | (H2O,K)3.5Fe8(PO4)6(OH)7 · 5H2O |
| 8.DJ.20 | Meurigite-Na | NaFe3+8(PO4)6(OH)7 · 6.5H2O |
| 8.DJ.30 | Wycheproofite | NaAlZr(PO4)2(OH) · H2O |
| 8.DJ.35 | Ercitite | Na2Mn3+2(PO4)2(OH)2 · 4H2O |
| 8.DJ.40 | Mrázekite | Bi2Cu3(PO4)2O2(OH)2 · H2O |
| 8.DJ.45 | Attikaite | Ca3Cu2Al2(AsO4)4(OH)4 · 2H2O |
| 8.DJ.50 | Mengeite | Ba(Mg,Mn2+)Mn3+4(PO4)4(OH)4 · 4H2O |
Other Information
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 Jungite
mindat.org URL:
https://www.mindat.org/min-2122.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Jungite
Localities for Jungite
Showing 3 localities.
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.
Germany (TL) | |
| Moore et al. (1980) +1 other reference |
| Bender et al. (1994) |
USA | |
Quick NavTopAbout JungiteUnique IdentifiersSimilar NamesIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Hagendorf South Pegmatite, Hagendorf, Waidhaus, Neustadt an der Waldnaab District, Upper Palatinate, Bavaria, Germany