Johninnesite
A valid IMA mineral species
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About Johninnesite
Formula:
Na2Mn2+9Mg7(OH)8[AsO4]2[Si6O17]2
Colour:
Brownish-yellow, yellow-brown
Lustre:
Vitreous, Sub-Vitreous, Silky
Hardness:
5 - 6
Specific Gravity:
3.48
Crystal System:
Triclinic
Member of:
Name:
Named in 1986 by P. J. Dunn, Donald R. Peacor, Shu-Chun Su, Joseph A. Nelen, and Oleg von Knorring in honour of John Innes [1948 Australia - 1993 Western Australia, Australia], mineralogist of the Tsumeb Corporation and the Commonwealth Scientific and Industrial Research Organization (CSIRO) of Western Australia, for his contributions to the geology and mineralogy of the Tsumeb and Kombat mines. John Innes authored many scientific papers, including several naming new minerals.
Golden-brown to yellow-brown vitreous to silky fibers in bundles to 2.5 cm.
Unique Identifiers
Mindat ID:
2106
Long-form identifier:
mindat:1:1:2106:3
IMA Classification of Johninnesite
Approved
IMA Formula:
Na2Mn2+9Mg7(As5+O4)2(Si6O17)2(OH)8
Approval year:
1985
First published:
1986
Classification of Johninnesite
9.DH.70
9 : SILICATES (Germanates)
D : Inosilicates
H : Inosilicates with 4-periodic single chains, Si4O12
9 : SILICATES (Germanates)
D : Inosilicates
H : Inosilicates with 4-periodic single chains, Si4O12
69.2.5.1
69 : INOSILICATES Chains with Side Branches or Loops
2 : Chains with Side Branches or Loops with P>2
69 : INOSILICATES Chains with Side Branches or Loops
2 : Chains with Side Branches or Loops with P>2
17.7.6
17 : Silicates Containing other Anions
7 : Silicates with vanadate, arsenate or antimonate
17 : Silicates Containing other Anions
7 : Silicates with vanadate, arsenate or antimonate
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 |
|---|---|---|
| Jin | 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 Johninnesite
Vitreous, Sub-Vitreous, Silky
Transparency:
Transparent, Translucent
Colour:
Brownish-yellow, yellow-brown
Streak:
Light brownish-yellow
Hardness:
5 - 6 on Mohs scale
Tenacity:
Very brittle
Cleavage:
Distinct/Good
{100} good, {010} poor
{100} good, {010} poor
Fracture:
Splintery
Density:
3.48(4) g/cm3 (Measured) 3.51 g/cm3 (Calculated)
Optical Data of Johninnesite
Type:
Biaxial (-)
RI values:
nα = 1.6742(4) nβ = 1.6968(3) nγ = 1.6999(3)
2V:
Measured: 41° (2), Calculated: 40.9°
Birefringence:
0.0257
Max. Birefringence:
δ = 0.026
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
Dispersion:
r > v distinct
Pleochroism:
Non-pleochroic
Chemistry of Johninnesite
Mindat Formula:
Na2Mn2+9Mg7(OH)8[AsO4]2[Si6O17]2
Element Weights:
Common Impurities:
Fe,H2O
Crystallography of Johninnesite
Crystal System:
Triclinic
Cell Parameters:
a = 10.44(2) Å, b = 11.064(6) Å, c = 9.62(1) Å
α = 107.43(7)°, β = 82.7(1)°, γ = 111.6(1)°
α = 107.43(7)°, β = 82.7(1)°, γ = 111.6(1)°
Ratio:
a:b:c = 0.944 : 1 : 0.869
Unit Cell V:
985.54 ų (Calculated from Unit Cell)
Z:
1
Morphology:
Fibers often in subparallel to slightly divergent groups.
Twinning:
Observed, but not defined
Comment:
Point Group: 1 or 1; Space Group: P1 or P1.
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) |
|---|---|---|---|---|---|---|---|
| 0001674 | Johninnesite | Grice J D, Dunn P J (1994) Johninnesite: Crystal-structure determination and its relationship to other arsenosilicates American Mineralogist 79 991-995 |  | 1994 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 9.8 Å | (60) |
| 9.2 Å | (1) |
| 7.8 Å | (2) |
| 7.3 Å | (5) |
| 5.99 Å | (40) |
| 5.26 Å | (10) |
| 4.91 Å | (10b) |
| 4.63 Å | (1) |
| 4.39 Å | (10) |
| 4.24 Å | (2) |
| 4.06 Å | (30) |
| 3.89 Å | (30) |
| 3.67 Å | (30) |
| 3.48 Å | (30) |
| 3.38 Å | (40) |
| 3.23 Å | (60) |
| 3.05 Å | (10) |
| 2.965 Å | (20) |
| 2.892 Å | (20) |
| 2.842 Å | (20) |
| 2.676 Å | (100) |
| 2.630 Å | (2) |
| 2.571 Å | (10) |
| 2.479 Å | (40) |
| 2.436 Å | (30) |
| 2.354 Å | (20) |
| 2.288 Å | (10) |
| 2.190 Å | (10) |
| 2.147 Å | (5) |
| 2.044 Å | (20) |
| 1.994 Å | (1) |
| 1.866 Å | (30) |
| 1.796 Å | (20) |
| 1.772 Å | (1) |
| 1.726 Å | (10) |
| 1.701 Å | (10) |
| 1.623 Å | (2) |
| 1.606 Å | (30) |
| 1.539 Å | (40) |
| 1.498 Å | (2) |
| 1.441 Å | (10) |
| 1.427 Å | (5) |
| 1.402 Å | (2) |
| 1.386 Å | (2) |
| 1.365 Å | (5) |
| 1.359 Å | (2) |
| 1.348 Å | (2) |
| 1.301 Å | (2) |
| 1.279 Å | (5) |
| 1.262 Å | (2) |
| 1.214 Å | (5) |
Comments:
Dunn et al. (1986)
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits |
Type Occurrence of Johninnesite
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, 163207.
Geological Setting of Type Material:
Found in hydrothermal veins of hausmannite-baryte
Associated Minerals at Type Locality:
Synonyms of Johninnesite
Other Language Names for Johninnesite
Relationship of Johninnesite to other Species
Member of:
Other Members of Deerite-Howieite Group:
| Deerite | Fe2+6Fe3+3(Si6O17)O3(OH)5 | Mon. 2/m : P21/b |
| Howieite | Na(Fe2+,Fe3+,Al,Mg)12(Si6O17)2(O,OH)10 | Tric. 1 : P1 |
| Taneyamalite | (Na,Ca)Mn2+12(Si,Al)12(O,OH)44 | Tric. |
Common Associates
Associations Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 9.DH. | Devilliersite | Ca4Ca2Fe3+10O4[(Fe3+10Si2)O36] |
| 9.DH. | 'Gageite-2M' | (Mn,Mg,Zn)42Si16O54(OH)40 |
| 9.DH. | Bavsiite | Ba2V2O2[Si4O12] |
| 9.DH. | Yuzuxiangite | Sr3Fe3+(Si2O6)2(OH) · 3H2O |
| 9.DH. | Louisfuchsite | Ca2(Mg4Ti2)(Al4Si2)O20 |
| 9.DH.05 | Leucophanite | NaCaBeSi2O6F |
| 9.DH.10 | Ohmilite | Sr3(Ti,Fe3+)(Si4O12)(O,OH) · 2-3H2O |
| 9.DH.15 | Haradaite | SrVSi2O7 |
| 9.DH.15 | Suzukiite | BaVSi2O7 |
| 9.DH.20 | Shcherbakovite | (K,Ba)KNa(Ti,Nb)2(Si4O12)O2 |
| 9.DH.20 | Batisite | BaNaNaTi2(Si4O12)O2 |
| 9.DH.20 | Noonkanbahite | BaKNaTi2(Si4O12)O2 |
| 9.DH.25 | Taikanite | Sr3BaMn2+2(Si4O12)O2 |
| 9.DH.30 | Krauskopfite | BaSi2O5 · 3H2O |
| 9.DH.35 | Gageite | Mn21(Si4O12)2O3(OH)20 |
| 9.DH.35 | Balangeroite | (Mg,Fe2+,Fe3+,Mn2+)42Si16O54(OH)40 |
| 9.DH.40 | Kuratite | Ca2(Fe2+5Ti)O2[Si4Al2O18] |
| 9.DH.40 | Aenigmatite | Na4[Fe2+10Ti2]O4[Si12O36] |
| 9.DH.40 | Dorrite | Ca4(Mg3Fe3+9)O4(Si3Al8Fe3+O36) |
| 9.DH.40 | Serendibite | Ca4[Mg6Al6]O4[Si6B3Al3O36] |
| 9.DH.40 | Rhönite | Ca4[Mg8Fe3+2Ti2]O4[Si6Al6O36] |
| 9.DH.40 | Khesinite | Ca4(Mg3Fe3+9)O4(Fe3+9Si3)O36 |
| 9.DH.40 | 'UM1991-29-SiO:FeMgNa' | Na4(Mg5Fe3+7)O4[Si9Fe3+3O36] |
| 9.DH.40 | Høgtuvaite | Ca4[Fe2+6Fe3+6]O4[Si8Be2Al2O36] |
| 9.DH.40 | 'Leucorhönite' | Ca2(Mg,Fe3+,Al)6(Si,Al)6O20 |
| 9.DH.40 | Welshite | Ca4Mg9Sb3O4[Si6Be3AlFe2O36] |
| 9.DH.40 | Wilkinsonite | Na2Fe2+4Fe3+2(Si6O18)O2 |
| 9.DH.40 | Krinovite | Na2Mg4Cr3+2(Si6O18)O2 |
| 9.DH.40 | Makarochkinite | (Ca,Na)4[Fe2+8Fe3+2Ti2]O4[Si8Be2Al2O36] |
| 9.DH.45 | Sapphirine | Mg4(Mg3Al9)O4[Si3Al9O36] |
| 9.DH.50 | Khmaralite | (Mg,Al,Fe)16[(Al,Si,Be)12O36]O4 |
| 9.DH.55 | 'UM1988-26-SiO:AlMg' | Mg4Al2O[Si3Al2O15] |
| 9.DH.55 | Surinamite | (Mg,Fe)3Al4BeSi3O16 |
| 9.DH.60 | Deerite | Fe2+6Fe3+3(Si6O17)O3(OH)5 |
| 9.DH.65 | Taneyamalite | (Na,Ca)Mn2+12(Si,Al)12(O,OH)44 |
| 9.DH.65 | Howieite | Na(Fe2+,Fe3+,Al,Mg)12(Si6O17)2(O,OH)10 |
| 9.DH.75 | Agrellite | NaCa2Si4O10F |
Fluorescence of Johninnesite
Not fluorescent
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 Johninnesite
mindat.org URL:
https://www.mindat.org/min-2106.html
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References for Johninnesite
Reference List:
Dunn, Pete J., Peacor, Donald R., Su, Shu-Chun, Nelen, Joseph A., von Knorring, Oleg (1986) Johninnesite, a arsenosilicate from new sodium manganese the Kombat Mine, Namibia. Mineralogical Magazine, 50 (358) 667-670 doi:10.1180/minmag.1986.050.358.12
Jambor, John L.; Bladh, Kenneth W.; Ercit, T. Scott; Grice, Joel D.; Grew, Edward S. (1988) New mineral names. American Mineralogist, 73 (7-8). 927-935
Localities for Johninnesite
Showing 2 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.
Namibia (TL) | |
| Dunn et al. (1986) +1 other reference |
Switzerland | |
| Brugger J. (1996) +2 other references |
Quick NavTopAbout JohninnesiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
Schmorrasgrat-South, Ausserferrera, Ferrera, Viamala Region, Grisons, Switzerland