Manganoblödite
A valid IMA mineral species
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About Manganoblödite
Formula:
Na2Mn(SO4)2 · 4H2O
Colour:
reddish-pink in aggregates
Lustre:
Vitreous
Hardness:
2½
Specific Gravity:
2.29
Crystal System:
Monoclinic
Member of:
Name:
For the relation to blödite and its manganese content.
The Mn analogue of blödite, cobaltoblödite, nickelblödite, and changoite. Chemically somewhat similar to D'Ansite-(Mn).
Name Encoding
ASCII-7:
Manganoblodite
Unique Identifiers
Mindat ID:
43343
Long-form identifier:
mindat:1:1:43343:5
IMA Classification of Manganoblödite
Classification of Manganoblödite
7.00.
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
0 :
0 :
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
0 :
0 :
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 |
|---|---|---|
| Mblö | 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 Manganoblödite
Vitreous
Transparency:
Transparent
Colour:
reddish-pink in aggregates
Streak:
White
Hardness:
2½ on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Parting:
none
Fracture:
Irregular/Uneven
Density:
2.29(2) g/cm3 (Measured) 2.347 g/cm3 (Calculated)
Optical Data of Manganoblödite
Type:
Biaxial (-)
RI values:
nα = 1.493(2) nβ = 1.498(2) nγ = 1.501(2)
Max. Birefringence:
δ = 0.008
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:
Moderate (negative)
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.
No measured or calculated 2V is on file for this mineral, so the value used here (75°) is estimated from its recorded refractive indices and optic sign, not from a direct 2V measurement.
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.
No measured or calculated 2V is on file for this mineral, so the value used here (75°) is estimated from its recorded refractive indices and optic sign, not from a direct 2V measurement.
Chemistry of Manganoblödite
Mindat Formula:
Na2Mn(SO4)2 · 4H2O
Element Weights:
Crystallography of Manganoblödite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/c
Setting:
P21/a
Cell Parameters:
a = 11.137(2) Å, b = 8.279(1) Å, c = 5.5381(9) Å
β = 100.42(1)°
β = 100.42(1)°
Ratio:
a:b:c = 1.345 : 1 : 0.669
Unit Cell V:
502.21 ų (Calculated from Unit Cell)
Z:
2
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.556 Å | (70) |
| 4.266 Å | (45) |
| 3.791 Å | (26) |
| 3.338 Å | (21) |
| 3.291 Å | (100) |
| 3.256 Å | (67) |
| 2.968 Å | (22) |
| 2.647 Å | (24) |
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] |
Type Occurrence of Manganoblödite
General Appearance of Type Material:
aggregates of anhedral grains up to 60 μm forming thin crusts covering areas up to 2×2 cm on the surface of other sulfates
Place of Conservation of Type Material:
Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia, registration number 4257/1
Geological Setting of Type Material:
Oxidation zone of uranium deposit
Associated Minerals at Type Locality:
Synonyms of Manganoblödite
Other Language Names for Manganoblödite
Dutch:Manganoblödiet
German:Manganoblödit
Relationship of Manganoblödite to other Species
Member of:
Other Members of Blödite Group:
| Blödite | Na2Mg(SO4)2 · 4H2O | Mon. 2/m : P21/c |
| Changoite | Na2Zn(SO4)2 · 4H2O | Mon. 2/m : P21/c |
| Cobaltoblödite | Na2Co(SO4)2 · 4H2O | Mon. 2/m : P21/c |
| Nickelblödite | Na2Ni(SO4)2 · 4H2O | Mon. 2/m : P21/c |
Common Associates
Associations Based on Photo Data:
| 2 photos of Manganoblödite associated with Sideronatrite | Na2Fe(SO4)2(OH) · 3H2O |
| 1 photo of Manganoblödite associated with Bluelizardite | Na7(UO2)(SO4)4Cl(H2O)2 |
| 1 photo of Manganoblödite associated with Cobaltoblödite | Na2Co(SO4)2 · 4H2O |
| 1 photo of Manganoblödite associated with Ottohahnite | Na6(UO2)2(SO4)5(H2O)7 · 1.5H2O |
| 1 photo of Manganoblödite associated with Meisserite | Na5(UO2)(SO4)3(SO3OH)(H2O) |
| 1 photo of Manganoblödite associated with Blödite | Na2Mg(SO4)2 · 4H2O |
Related Minerals - Strunz-mindat Grouping
| 7.00. | Aldridgeite | (Cd2+,Ca)(Cu2+,Zn2+)4(S6+O4)2(OH)6 · 3H2O |
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 Manganoblödite
mindat.org URL:
https://www.mindat.org/min-43343.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Manganoblödite
Reference List:
Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2012) New minerals and nomenclature modifications approved in 2012. CNMNC Newsletter No 14. Mineralogical Magazine, 76 (5) 1281-1288 doi:10.1180/minmag.2012.076.5.15
Kasatkin, A. V., Nestola, F., Plášil, J., Marty, J., Belakovskiy, D. I., Agakhanov, A. A., Mills, S. J., Pedron, D., Lanza, A., Favaro, M., Bianchin, S., Lykova, I. S., Goliáš, V., Birch, W. D. (2013) Manganoblödite, Na2Mn(SO4)2·4H2O, and cobaltoblödite, Na2Co(SO4)2·4H2O: two new members of the blödite group from the Blue Lizard mine, San Juan County, Utah, USA. Mineralogical Magazine, 77 (3) 367-383 doi:10.1180/minmag.2013.077.3.10
Marinova, Delyana M., Zhecheva, Ekaterina N., Kukeva, Rositsa R., Markov, Pavel V., Nihtianova, Diana D., Stoyanova, Radostina K. (2017) Mixed sodium nickel-manganese sulfates: Crystal structure relationships between hydrates and anhydrous salts. Journal of Solid State Chemistry, 250. 49-59 doi:10.1016/j.jssc.2017.03.015
Localities for Manganoblödite
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.
Australia | |
| Birch (2013) +1 other reference |
USA (TL) | |
| Williams et al. (2012) +1 other reference |
| In the collection of Alex Earl |
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Blue Lizard Mine, Red Canyon Mining District, San Juan County, Utah, USA