Mikenewite
A valid IMA mineral species
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Formula:
Mn2+(S4+O3) · 3H2O
Colour:
Yellowish in transmitted light.
Lustre:
Vitreous
Hardness:
2½ - 3
Specific Gravity:
2.48
Crystal System:
Monoclinic
Name:
Named in honor of Mike New (24 October 1945 - 23 July 2022) of Tucson, Arizona, USA. He was mineral dealer; owner and operator of Top Gem Minerals, Inc. of Tucson.
Dimorph of:
Unique Identifiers
Mindat ID:
470613
Long-form identifier:
mindat:1:1:470613:3
IMA Classification of Mikenewite
Approved
IMA Formula:
Mn2+(S4+O3)·3H2O
First published:
2023
Approval history:
IMA no. 2022-102
Type description reference:
Classification of Mikenewite
4.JE.
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
E : Sulfites
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
E : Sulfites
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 |
|---|---|---|
| Mnw | 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 Mikenewite
Vitreous
Transparency:
Transparent
Colour:
Yellowish in transmitted light.
Streak:
White
Hardness:
2½ - 3 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
{101}
{101}
Density:
2.48(5) g/cm3 (Measured) 2.467 g/cm3 (Calculated)
Optical Data of Mikenewite
Type:
Biaxial (+)
RI values:
nα = 1.606(5) nβ = 1.614(5) nγ = 1.627(1)
2V:
Measured: 69° (3), Calculated: 77°
Max. Birefringence:
δ = 0.021
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:
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 weak
Pleochroism:
Visible
Comments:
The pleochroism is from grey to yellowish
Chemistry of Mikenewite
Mindat Formula:
Mn2+(S4+O3) · 3H2O
Element Weights:
Elements listed:
Chemical Analysis
Empirical formulas:
| Sample ID | Empirical Formula |
|---|---|
| 1 | (Mn0.86Zn0.12Fe0.04Ca0.02)Σ1.04(S0.98O3) · 3H2O |
Sample references:
| ID | Locality | Reference | Notes |
|---|---|---|---|
| 1 | San Judas Chimney, Ojuela Mine, Mapimí, Mapimí Municipality, Durango, Mexico | by EPMA; empirical formula basis: 6 O atoms pfu |
Crystallography of Mikenewite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/c
Setting:
P21/n
Cell Parameters:
a = 6.6390(3) Å, b = 8.8895(4) Å, c = 8.7900(4) Å
β = 96.095(2)°
β = 96.095(2)°
Ratio:
a:b:c = 0.747 : 1 : 0.989
Unit Cell V:
515.83 ų (Calculated from Unit Cell)
Z:
4
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.547 Å | (42) |
| 4.707 Å | (100) |
| 4.367 Å | (38) |
| 3.947 Å | (49) |
| 3.924 Å | (49) |
| 3.327 Å | (60) |
| 3.097 Å | (45) |
| 2.774 Å | (57) |
Type Occurrence of Mikenewite
General Appearance of Type Material:
Spheres of platy crystals.
Place of Conservation of Type Material:
Collections of the University of Arizona Alfie Norville Gem and Mineral Museum, 115 N Church Ave Ste 121, Tucson, AZ 85701, USA, catalogue no. 22724 (holotype), and the RRUFF Project, deposition no. R210021 (cotype).
Geological Setting of Type Material:
Oxidation zone.
Associated Minerals at Type Locality:
Other Language Names for Mikenewite
Dutch:Mikenewiet
German:Mikenewit
Common Associates
Associations Based on Photo Data:
| 1 photo of Mikenewite associated with Hemimorphite | Zn4Si2O7(OH)2 · H2O |
Related Minerals - Strunz-mindat Grouping
| 4.JE.X | Albertiniite | Fe2+(SO3) · 3H2O |
| 4.JE. | Vanpeltite | (Mo2O5)(S4+O3) · 4H2O |
| 4.JE.05 | Fleisstalite | FeSO3 · 3H2O |
| 4.JE.05 | Gravegliaite | Mn2+SO3 · 3H2O |
| 4.JE.10 | Hannebachite | CaSO3 · H2O |
| 4.JE.15 | Orschallite | Ca3(SO3)2(SO4) · 12H2O |
| 4.JE.20 | Scotlandite | PbSO3 |
| 4.JE.25 | Kollerite | (NH4)2Fe3+(SO3)2(OH) · H2O |
Other Information
Notes:
Insoluble in water, weakly soluble in 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 Mikenewite
mindat.org URL:
https://www.mindat.org/min-470613.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 Mikenewite
Localities for Mikenewite
Showing 1 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.
Mexico (TL) | |
| Bosi et al. (2023) +1 other reference |
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