Meixnerite
A valid IMA mineral species
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About Meixnerite
Prof. Heinz Meixner
Formula:
Mg6Al2(OH)16(OH)2 · 4H2O
Hardness:
2
Crystal System:
Trigonal
Member of:
Name:
Named in honour of Professor Heinrich Hermann Meixner (1908–1981), Austrian mineralogist, University of Salzburg, Salzburg, Austria.
Unique Identifiers
Mindat ID:
2628
Long-form identifier:
mindat:1:1:2628:0
Similar Names
| Meierite | A valid IMA mineral species | Ba44Si66Al30O192Cl25(OH)33 |
| Meisserite | A valid IMA mineral species | Na5(UO2)(SO4)3(SO3OH)(H2O) |
| Meitnerite | A valid IMA mineral species | (NH4)(UO2)(SO4)(OH) · 2H2O |
IMA Classification of Meixnerite
Classification of Meixnerite
4.FL.05
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
L : Hydroxides with H2O +- (OH); sheets of edge-sharing octahedra
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
L : Hydroxides with H2O +- (OH); sheets of edge-sharing octahedra
6.4.6.1
6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
4 : Miscellaneous
6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
4 : Miscellaneous
7.4.10
7 : Oxides and Hydroxides
4 : Oxides of Be, Mg and the alkaline earths
7 : Oxides and Hydroxides
4 : Oxides of Be, Mg and the alkaline earths
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Mxn | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Mxn | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Meixnerite
Hardness:
2 on Mohs scale
Optical Data of Meixnerite
Type:
Uniaxial (-)
RI values:
nω = 1.517 nε = 1.5
Max. Birefringence:
δ = 0.017
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:
Low (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 uniaxial interference figure - the conoscopic
(convergent-light, Bertrand-lens-in) view, for a grain cut with the optic axis
centred and vertical. The coloured rings are isochromatics, computed with the
same physics as the Michel-Lévy bar above; the dark cross is the isogyre.
For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.
For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.
Chemistry of Meixnerite
Mindat Formula:
Mg6Al2(OH)16(OH)2 · 4H2O
Element Weights:
Elements listed:
Crystallography of Meixnerite
Crystal System:
Trigonal
Class (H-M):
3m(32/m) - Hexagonal Scalenohedral
Space Group:
R3m
Cell Parameters:
a = 3.046(2) Å, c = 22.93(2) Å
Ratio:
a:c = 1 : 7.528
Unit Cell V:
184.24 ų (Calculated from Unit Cell)
Comment:
Z = 3/8
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.64 Å | (55) |
| 3.82 Å | (72) |
| 2.57 Å | (64) |
| 2.287 Å | (70) |
| 1.94 Å | (100) |
| 1.52 Å | (75) |
| 1.494 Å | (57) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 3b: Earth’s earliest hydrosphere | >4.45 |
| 13 : Hadean serpentinization | |
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] |
Type Occurrence of Meixnerite
Synonyms of Meixnerite
Other Language Names for Meixnerite
Relationship of Meixnerite to other Species
Member of:
Other Members of Hydrotalcite Group:
| Desautelsite | Mg6Mn3+2(OH)16[CO3] · 4H2O | Trig. 3m(32/m) |
| Droninoite | Ni6Fe3+2(OH)16Cl2 · 4H2O | Trig. 3m(32/m) : R3m |
| Hydrotalcite | Mg6Al2(CO3)(OH)16 · 4H2O | Trig. 3m(32/m) : R3m |
| Iowaite | Mg6Fe3+2(OH)16Cl2 · 4H2O | Trig. 3m(32/m) : R3m |
| Kaznakhtite | Ni6Co3+2(CO3)(OH)16 · 4H2O | Trig. 3 : R3 |
| Pyroaurite | Mg6Fe3+2(OH)16[CO3] · 4H2O | Trig. 3m(32/m) : R3m |
| Reevesite | Ni6Fe3+2(OH)16(CO3) · 4H2O | Trig. 3m(32/m) : R3m |
| Stichtite | Mg6Cr3+2(OH)16[CO3] · 4H2O | Trig. 3m(32/m) : R3m |
| Takovite | Ni6Al2(OH)16[CO3] · 4H2O | Trig. 3m(32/m) : R3m |
| 'UM2002-02-COH:FeNi' | (Fe2+,Ni)6Fe3+2(CO3)(OH)16 · 4H2O | |
| Woodallite | Mg6Cr2(OH)16Cl2 · 4H2O | Trig. 3m(32/m) : R3m |
Common Associates
Associations Based on Photo Data:
| 1 photo of Meixnerite associated with Phillipsite Subgroup | (Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O |
Related Minerals - Strunz-mindat Grouping
| 4.FL. | Trébeurdenite | Fe2+2Fe3+4O2(OH)10CO3 · 3H2O |
| 4.FL. | Mariakrite | [Ca4Al2(OH)12(H2O)4][Fe2S4] |
| 4.FL.05 | Muskoxite | Mg7Fe4O13 · 10H2O |
| 4.FL.05 | Jamborite | Ni2+1-xCo3+x(OH)2-x(SO4)x · nH2O |
| 4.FL.05 | Mössbauerite | Fe3+6O4(OH)8[CO3] · 3H2O |
| 4.FL.05 | Woodallite | Mg6Cr2(OH)16Cl2 · 4H2O |
| 4.FL.05 | Fougèrite | Fe2+4Fe3+2(OH)12[CO3] · 3H2O |
| 4.FL.05 | Dritsite | Li2Al4(OH)12Cl2 · 3H2O |
| 4.FL.05 | Rotemite | Ca4Cr2(OH)12Cl2 · 4H2O |
| 4.FL.05 | Iowaite | Mg6Fe3+2(OH)16Cl2 · 4H2O |
| 4.FL.10 | Hydrocalumite | Ca4Al2(OH)12(Cl,CO3,OH)2 · 4H2O |
| 4.FL.15 | Kuzelite | Ca4Al2(OH)12[SO4] · 6H2O |
| 4.FL.20 | Jianshuiite | (Mg,Mn,Ca)Mn3O7 · 3H2O |
| 4.FL.20 | Ernienickelite | NiMn3O7 · 3H2O |
| 4.FL.20 | Aurorite | Mn2+Mn4+3O7 · 3H2O |
| 4.FL.20 | Chalcophanite | ZnMn4+3O7 · 3H2O |
| 4.FL.25 | Woodruffite | Zn2+x/2(Mn4+1-xMn3+x)O2 · yH2O |
| 4.FL.30 | Asbolane | (Ni,Co)2-xMn4+(O,OH)4 · nH2O |
| 4.FL.30 va | 'Lampadite' | Cu, Mn, O, H |
| 4.FL.35 | Buserite | Na4Mn14O27 · 21H2O |
| 4.FL.40 | Takanelite | (Mn,Ca)Mn4O9 · H2O |
| 4.FL.40 | Ranciéite | (Ca,Mn2+)0.2(Mn4+,Mn3+)O2 · 0.6H2O |
| 4.FL.45 | Birnessite | (Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O |
| 4.FL.55 | Cianciulliite | Mn(Mg,Mn)2Zn2(OH)10 · 2-4H2O |
| 4.FL.60 | Jensenite | Cu3[TeO6] · 2H2O |
| 4.FL.65 | Leisingite | Cu2MgTe6+O6 · 6H2O |
| 4.FL.70 | Magnesiohongruiite-(Fe3+) | (Mg2Fe3+)Fe3+NbO7(OH) |
| 4.FL.70 | Akdalaite | Al10O14(OH)2 |
| 4.FL.75 | Cafetite | CaTi2O5 · H2O |
| 4.FL.80 | Mourite | UMo5O12(OH)10 |
| 4.FL.85 | Deloryite | Cu4(UO2)(MoO4)2(OH)6 |
| 4.FL.90 | Lagalyite | Ca2xMn1-xO2 · 1.5-2H2O |
| 4.FL.95 | 'Tunnerite' | |
| 4.FL.100 | Carbocalumite | Ca4Al2(OH)12(CO3) · 6H2O |
| 4.FL.100 | Mampsisite | Ca4Al2(CO3)(OH)12 · 5H2O |
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 Meixnerite
mindat.org URL:
https://www.mindat.org/min-2628.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
Mineral Dealers:
References for Meixnerite
Reference List:
Localities for Meixnerite
Showing 8 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.
Austria (TL) | |
| Koritnig et al. (1975) |
Germany | |
| Pöllmann et al. (1998) +1 other reference |
Greece | |
| Wendel et al. (1999) |
Italy | |
| Analyze from Anthony R. Kampf's Lab et al. (2024) |
Poland | |
| Kruszewski et al. (2020) |
Russia | |
| Mazurov et al. (2007) |
| Chaykovsky et al. (2015) |
USA | |
| Li +3 other references |
Quick NavTopAbout MeixneriteUnique IdentifiersSimilar NamesIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Mt. Ramazzo Mine, Borzoli, Genoa, Genoa, Liguria, Italy