Magnesiozippeite
A valid IMA mineral species
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About Magnesiozippeite
Formula:
Mg(UO2)2(SO4)O2 · 3.5H2O
Colour:
Intense yellow, orange, red brownish yellow.
Hardness:
2
Specific Gravity:
4.756 (Calculated)
Crystal System:
Monoclinic
Member of:
Name:
For its relation to zippeite and dominance of magnesium. Originally called magnesium-zippeite, the name was changed in 2008 by the IMA (Burke 2008).
Unique Identifiers
Mindat ID:
2474
Long-form identifier:
mindat:1:1:2474:3
Classification of Magnesiozippeite
The zippeite-type sheet
The uranyl sulfate sheet topology found in the members of the zippeite group.
IMA Classification of Magnesiozippeite
Approved
IMA status notes:
Redefined by the IMA
IMA Formula:
Mg(U6+O2)2(S6+O4)O2·3.5H2O
Approval year:
2000
First published:
1976
Approval history:
Redefined IMA00-G: Neotype approved; redefined as monoclinic (Grice and Ferraris 2003).
7.EC.05
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
E : Uranyl sulfates
C : With medium-sized and large cations
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
E : Uranyl sulfates
C : With medium-sized and large cations
31.10.4.3
31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
10 : Miscellaneous
31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
10 : Miscellaneous
25.8.13
25 : Sulphates
8 : Sulphates of Sb, V, Cr and U
25 : Sulphates
8 : Sulphates of Sb, V, Cr and U
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 |
|---|---|---|
| Mzip | 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 Magnesiozippeite
Transparency:
Translucent
Colour:
Intense yellow, orange, red brownish yellow.
Hardness:
2 on Mohs scale
Density:
4.756 g/cm3 (Calculated)
Optical Data of Magnesiozippeite
Type:
Biaxial
RI values:
nα = 1.7 nβ = 1.74 nγ = 1.79
Max. Birefringence:
δ = 0.090
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
Dispersion:
r > v strong
Pleochroism:
Visible
Comments:
X = pale yellow; Y = yellow; Z = dark yellow.
Chemistry of Magnesiozippeite
Mindat Formula:
Mg(UO2)2(SO4)O2 · 3.5H2O
Element Weights:
Crystallography of Magnesiozippeite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 8.6514(4) Å, b = 14.1938(7) Å, c = 17.7211(9) Å
β = 104.131(1)°
β = 104.131(1)°
Ratio:
a:b:c = 0.61 : 1 : 1.249
Unit Cell V:
2,110.24 ų (Calculated from Unit Cell)
Morphology:
Earthy, granular/crystalline.
Comment:
Data for synthetic sample. Natural crystals gave a cell with a halved volume and interlayer complex, which is distinctive from synthetics - there is an additional Mg-octahedron resulting in a infinite chain of polyhedra, instead of isolated dimers of Mg-octahedra in synthetic material (Plášil et al., 2013): a = 8.7005(5), b = 14.2541(6), c = 8.8433(5)Å, β = 104.408(5)°, V = 1062.24(9) Å3.
Crystal Structure
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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) |
|---|---|---|---|---|---|---|---|
| 0005851 | Magnesiozippeite | Burns P C, Deely K M, Hayden L A (2003) The crystal chemistry of the zippeite group The Canadian Mineralogist 41 687-706 |  | 2003 | 0 | 293 | |
| 0005854 | Magnesiozippeite | Burns P C, Deely K M, Hayden L A (2003) The crystal chemistry of the zippeite group The Canadian Mineralogist 41 687-706 | | 2003 | 0 | 293 | |
| 0005854 | Magnesiozippeite | Burns P C, Deely K M, Hayden L A (2003) The crystal chemistry of the zippeite group The Canadian Mineralogist 41 687-706 | | 2003 | 0 | 293 | |
| 0005851 | Magnesiozippeite | Burns P C, Deely K M, Hayden L A (2003) The crystal chemistry of the zippeite group The Canadian Mineralogist 41 687-706 | | 2003 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.112 Å | (100) |
| 3.559 Å | (58) |
| 3.104 Å | (40) |
| 3.449 Å | (38) |
| 2.653 Å | (22) |
| 1.9518 Å | (22) |
| 2.4774 Å | (21) |
Comments:
Jáchymov, Czech Republic
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47b : [Sulfates and sulfites] | |
| 47f : [Uranyl (U⁶⁺) minerals] | |
| Stage 10b: Anthropogenic minerals | <10 Ka |
| 55 : Anthropogenic mine minerals |
Type Occurrence of Magnesiozippeite
Place of Conservation of Type Material:
Musée Géologique Cantonal, Lausanne, Switzerland, MGL 54060 (neotype).
Harvard University, Boston, USA, 2000-G (holotype).
Harvard University, Boston, USA, 2000-G (holotype).
Synonyms of Magnesiozippeite
Other Language Names for Magnesiozippeite
Relationship of Magnesiozippeite to other Species
Member of:
Other Members of Zippeite Group:
| Ammoniozippeite | (NH4)2[(UO2)2(SO4)O2] · H2O | Orth. mmm(2/m2/m2/m) : Cmca |
| Cobaltzippeite | Co(UO2)2(SO4)O2 · 3.5H2O | Mon. 2/m : B2/m |
| Natrozippeite | Na5(UO2)8(SO4)4O5(OH)3 · 12H2O | Mon. 2/m : P21/m |
| Nickelzippeite | Ni2(UO2)6(SO4)3(OH)10 · 16H2O | Mon. |
| Plavnoite | K0.8Mn0.6[(UO2)2O2(SO4)] · 3.5H2O | Mon. 2/m : B2/m |
| Pseudojohannite | Cu3(UO2)4(SO4)2O4(OH)2 · 12H2O | Tric. 1 : P1 |
| Sejkoraite-(Y) | Y2(UO2)8(SO4)4O6(OH)2 · 26H2O | Tric. 1 : P1 |
| Zinczippeite | Zn(UO2)2(SO4)O2 · 3.5H2O | Mon. 2/m : B2/m |
| Zippeite | K3(UO2)4(SO4)2O3(OH) · 3H2O | Mon. 2 : B2 |
Common Associates
Associations Based on Photo Data:
| 5 photos of Magnesiozippeite associated with Johannite | Cu(UO2)2(SO4)2(OH)2 · 8H2O |
| 4 photos of Magnesiozippeite associated with Gypsum | CaSO4 · 2H2O |
| 3 photos of Magnesiozippeite associated with Marécottite | Mg3(UO2)8(SO4)4O6(OH)2 · 28H2O |
| 2 photos of Magnesiozippeite associated with Leesite | K(H2O)2[(UO2)4O2(OH)5] · 3H2O |
| 1 photo of Magnesiozippeite associated with Blatonite | (UO2)CO3 · H2O |
Related Minerals - Strunz-mindat Grouping
| 7.EC. | Nitscheite | (NH4)2[(UO2)2(SO4)3(H2O)2] · 3H2O |
| 7.EC. | Beshtauite | (NH4)2(UO2)(SO4)2 · 2H2O |
| 7.EC. | Oldsite-(K) | K2Fe2+[(UO2)(SO4)2]2(H2O)8 |
| 7.EC. | Adolfpateraite | K(UO2)(SO4)(OH)(H2O) |
| 7.EC. | Libbyite | (NH4)2(Na2◻)[(UO2)2(SO4)3(H2O)]2 · 7H2O |
| 7.EC. | Seaborgite | LiK2Na6(UO2)(SO4)5(SO3OH)(H2O) |
| 7.EC.05 | Zinczippeite | Zn(UO2)2(SO4)O2 · 3.5H2O |
| 7.EC.05 | Zippeite | K3(UO2)4(SO4)2O3(OH) · 3H2O |
| 7.EC.05 | Cobaltzippeite | Co(UO2)2(SO4)O2 · 3.5H2O |
| 7.EC.05 | Nickelzippeite | Ni2(UO2)6(SO4)3(OH)10 · 16H2O |
| 7.EC.05 | Redcanyonite | (NH4)2Mn[(UO2)4O4(SO4)2](H2O)4 |
| 7.EC.05 | Natrozippeite | Na5(UO2)8(SO4)4O5(OH)3 · 12H2O |
| 7.EC.05 | Ammoniozippeite | (NH4)2[(UO2)2(SO4)O2] · H2O |
| 7.EC.05 | Plavnoite | K0.8Mn0.6[(UO2)2O2(SO4)] · 3.5H2O |
| 7.EC.10 | Rabejacite | Ca(UO2)4(SO4)2(OH)6 · 6H2O |
| 7.EC.10 | Svornostite-(NH4) | (NH4)2Mg(UO2)2(SO4)4(H2O)8 |
| 7.EC.10 | Svornostite-(K) | K2Mg[(UO2)(SO4)2]2(H2O)8 |
| 7.EC.15 | Sejkoraite-(Y) | Y2(UO2)8(SO4)4O6(OH)2 · 26H2O |
| 7.EC.15 | Marécottite | Mg3(UO2)8(SO4)4O6(OH)2 · 28H2O |
| 7.EC.15 | Hubbardite | Mg(H2O)6[(UO2)2O(OH)(SO4)]2 · 8H2O |
| 7.EC.20 | Pseudojohannite | Cu3(UO2)4(SO4)2O4(OH)2 · 12H2O |
| 7.EC.40 | Bluelizardite | Na7(UO2)(SO4)4Cl(H2O)2 |
| 7.EC.45 | Meisserite | Na5(UO2)(SO4)3(SO3OH)(H2O) |
| 7.EC.45 | Fermiite | Na4(UO2)(SO4)3 · 3H2O |
| 7.EC.45 | Oppenheimerite | Na2(UO2)(SO4)2 · 3H2O |
| 7.EC.50 | Feynmanite | Na(UO2)(SO4)(OH) · 3.5H2O |
| 7.EC.50 | Plášilite | Na(UO2)(SO4)(OH) · 2H2O |
| 7.EC.55 | Geschieberite | K2(UO2)(SO4)2 · 2H2O |
| 7.EC.60 | Ottohahnite | Na6(UO2)2(SO4)5(H2O)7 · 1.5H2O |
| 7.EC.65 | Péligotite | Na6(UO2)(SO4)4 · 4H2O |
| 7.EC.70 | Klaprothite | Na6(UO2)(SO4)4 · 4H2O |
| 7.EC.75 | Lussierite | Na10[(UO2)(SO4)4](SO4)2 · 3(H2O) |
| 7.EC.80 | Navrotskyite | K2Na10(UO2)3(SO4)9 · 2H2O |
| 7.EC.85 | Pseudomeisserite-(NH4) | (NH4)2Na4[(UO2)2(SO4)5] · 4H2O |
| 7.EC.90 | Wetherillite | Na2Mg(UO2)2(SO4)4 · 18H2O |
Radioactivity
Radioactivity:
| Element | % Content | Activity (Bq/kg) | Radiation Type |
|---|---|---|---|
| Uranium (U) | 63.0143% | 15,753,575 | α, β, γ |
| Thorium (Th) | 0.0000% | 0 | α, β, γ |
| Potassium (K) | 0.0000% | 0 | β, γ |
For comparison:
- Banana: ~15 Bq per fruit
- Granite: 1,000–3,000 Bq/kg
- EU exemption limit: 10,000 Bq/kg
Note: Risk is shown relative to daily recommended maximum exposure to non-background radiation of 1000 µSv/year. Note that natural background radiation averages around 2400 µSv/year so in reality these risks are probably extremely overstated! With infrequent handling and safe storage natural radioactive minerals do not usually pose much risk.
Interactive Simulator:
Note: The mass selector refers to the mass of radioactive mineral present, not the full specimen, also be aware that the matrix may also be radioactive, possibly more radioactive than this mineral!
Activity: –
| Distance | Dose rate | Risk |
|---|---|---|
| 1 cm | ||
| 10 cm | ||
| 1 m |
The external dose rate (D) from a radioactive mineral is estimated by summing the gamma radiation contributions from its Uranium, Thorium, and Potassium content, disregarding daughter-product which may have a significant effect in some cases (eg 'pitchblende'). This involves multiplying the activity (A, in Bq) of each element by its specific gamma ray constant (Γ), which accounts for its unique gamma emissions. The total unshielded dose at 1 cm is then scaled by the square of the distance (r, in cm) and multiplied by a shielding factor (μshield). This calculation provides a 'worst-case' or 'maximum risk' estimate because it assumes the sample is a point source and entirely neglects any self-shielding where radiation is absorbed within the mineral itself, meaning actual doses will typically be lower. The resulting dose rate (D) is expressed in microsieverts per hour (μSv/h).
D = ((AU × ΓU) + (ATh × ΓTh) + (AK × ΓK)) / r2 × μshield
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 Magnesiozippeite
mindat.org URL:
https://www.mindat.org/min-2474.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Magnesiozippeite
Reference List:
Ondruš, P., Veselovský, F., Hloušek, J., Skála, R., Vavřín, I., Frýda, J., Čejka, J., Gabašová, A. (1997) Secondary minerals of the Jáchymov (Joachimsthal) ore district. Journal of the Czech Geological Society, 42 (4). 3-69
Ondruš, P., Veselovský, F., Skála, R., Cisařová, I., Hloušek, J., Frýda, J., Vavřín, I., Čejka, J., Gabašová, A. (1997) New naturally occurring phases of secondary origin from Jáchymov (Joachimsthal) Journal of the Czech Geological Society, 42 (4) 77-108
Grice, J. D.; Ferraris, G. (2003) New minerals approved in 2002 and nomenclature modifications approved in 1998-2002 by the Commission on the New Minerals and Mineral Names, International Mineralogical Association. The Canadian Mineralogist, 41 (3). 795-802 doi:10.2113/gscanmin.41.3.795
Burns, P. C., Deely, K. M., Hayden, L. A. (2003) The crystal chemistry of the zippeite group. The Canadian Mineralogist, 41 (3). 687-706 doi:10.2113/gscanmin.41.3.687
Brugger, J., Burns, Peter C., Meisser, N. (2003) Contribution to the mineralogy of acid drainage of Uranium minerals: Marecottite and the zippeite-group. American Mineralogist, 88 (4) 676-685 doi:10.2138/am-2003-0421
Burns, Peter C. (2005) U6+ minerals and inorganic compounds: insights into an expanded structural hierarchy of crystal structures. The Canadian Mineralogist, 43 (6) 1839-1894 doi:10.2113/gscanmin.43.6.1839
Localities for Magnesiozippeite
Showing 21 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.
Canada | |
| McCollam (2002) |
Czech Republic | |
| Hloušek et al. (2002) |
| Thorne (n.d.) | |
| Desor (04/2022) | |
| Plášil et al. (2015) |
| McCollam (2002) |
France | |
| Vajdak (2006) |
Germany | |
| Desor (06/2020) |
| Witzke (2024) |
| Hans-Jürgen Haas collection |
| Witzke et al. (1998) |
Hungary | |
| Szakáll-Fehér 2014. |
Morocco | |
| Favreau (n.d.) +1 other reference |
Russia | |
| Eremin et al. (2023) |
Switzerland | |
| Meisser (2012) |
USA | |
| McCollam (2002) +1 other reference |
| Frondel et al. (1976) +3 other references |
| McCollam (2002) |
| Plášil et al. (2013) |
| McCollam (2002) | |
| Patrick Haynes. XRD and EDS by Michel ... |
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Jan Evangelista vein, Svornost Mine, Jáchymov, Karlovy Vary District, Karlovy Vary Region, Czech Republic