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Johninnesite

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Formula:
Na2Mn92+Mg7(OH)8[AsO4]2[Si6O17]2
System:
Triclinic
Hardness:
5 - 6
Name:
In honour of John Innes, mineralogist of the Tsumeb Corporation, for his contributions to the mineralogy of the Tsumeb and Kombat mines.
This page provides mineralogical data about Johninnesite.

Classification of Johninnesite

Approved
9.DH.70

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
17.7.6

17 : Silicates Containing other Anions
7 : Silicates with vanadate, arsenate or antimonate
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First Recorded Occurrence of Johninnesite

Year of Discovery:
1986

Physical Properties of Johninnesite

Hardness (Mohs):
5 - 6

Crystallography of Johninnesite

Crystal System:
Triclinic
Cell Parameters:
a = 10.48Å, b = 11.06Å, c = 9.65Å
α = 107.11°, β = 81.17°, γ = 111.86°
Ratio:
a:b:c = 0.948 : 1 : 0.873

Optical Data of Johninnesite

Type:
Biaxial (-)
RI values:
nα = 1.674 nβ = 1.697 nγ = 1.700
2V:
Measured: 41° , Calculated: 40°
Max Birefringence:
δ = 0.026
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r > v distinct

Chemical Properties of Johninnesite

Formula:
Na2Mn92+Mg7(OH)8[AsO4]2[Si6O17]2
Essential elements:
All elements listed in formula:
Common Impurities:
Fe,H2O

Relationship of Johninnesite to other Species

9.DH.05LeucophaniteNaCaBeSi2O6F
9.DH.10OhmiliteSr3(Ti,Fe3+)(Si4O12)(O,OH) · 2-3H2O
9.DH.15HaradaiteSrVSi2O7
9.DH.15SuzukiiteBaVSi2O7
9.DH.20BatisiteBaNaNaTi2(Si4O12)O2
9.DH.20Shcherbakovite(K,Ba)KNa(Ti,Nb)2(Si4O12)O2
9.DH.25TaikaniteSr3BaMn22+(Si4O12)O2
9.DH.30KrauskopfiteBaSi2O5 · 3H2O
9.DH.35Balangeroite(Mg,Fe2+,Fe3+,Mn2+)42Si16O54(OH)40
9.DH.35GageiteMn21(Si4O12)2O3(OH)20
9.DH.40AenigmatiteNa2Fe52+Ti(Si6O18)O2
9.DH.40DorriteCa4(Mg3Fe93+)O4(Si3Al8Fe3+O36)
9.DH.40Høgtuvaite(Ca,Na)2(Fe2+,Fe3+,Ti)6[O2|Be(Si,Al)5O18]
9.DH.40KrinoviteNa2Mg4Cr23+(Si6O18)O2
9.DH.40Makarochkinite(Ca,Na)2Fe42+Fe3+Ti[O2|BeAlSi4O18]
9.DH.40RhöniteCa2(Mg,Fe2+,Fe3+,Ti)6[O2|(Si,Al)6O18]
9.DH.40Serendibite(Ca,Na)2(Mg,Fe2+)3(Al,Fe3+)3[O2|(Si,Al,B)6O18]
9.DH.40WelshiteCa4Mg9Sb3O4[Si6Be3AlFe2O36]
9.DH.40WilkinsoniteNa2Fe42+Fe23+(Si6O18)O2
9.DH.45Sapphirine(Mg,Fe)4-xAl4+x[Al4+xSi2-xO18]O2
9.DH.50Khmaralite(Mg,Al,Fe)16[(Al,Si,Be)12O36]O4
9.DH.55Surinamite(Mg,Fe)3Al4BeSi3O16
9.DH.60Deerite(Fe,Mn)6(Fe,Al)3[Si6O17]O3(OH)5
9.DH.65HowieiteNa(Fe,Mn)10(Fe,Al)2Si12O31(OH)13
9.DH.65Taneyamalite(Na,Ca)(Mn,Mg,Fe)12Si12(O,OH)44
9.DH.75AgrelliteNaCa2Si4O10F
17.7.1SuzukiiteBaVSi2O7
17.7.2FranciscaniteMn62+(V5+,☐)2(SiO4)2(O,OH)6
17.7.3Kurumsakite(Zn,Ni,Cu)8Al8V25+Si5O35 · 27H2O (?)
17.7.4Ardennite-(As)Mn42+Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6
17.7.5Medaite(Mn,Ca)6(V,As)Si5O18OH
17.7.7TiragalloiteMn42+(HAsSi3O13)
17.7.8DixeniteCuMn142+Fe2+(SiO4)2(As5+O4)(As3+O3)5(OH)6
17.7.9AsbecasiteCa3(Ti,Sn4+)Be2(AsO3)6(SiO4)2
17.7.10McgoverniteMn19Zn3(AsO4)3(AsO3)(SiO4)3(OH)21
17.7.11KraissliteZn3(Mn,Mg)25(Fe3+,Al)(As3+O3)2[(Si,As5+)O4]10(OH)16
17.7.12Schallerite(Mn,Fe)16Si12As3O36(OH)17
17.7.13Nelenite(Mn,Fe)16(Si12O30)(OH)14[As33+O6(OH)3]
17.7.14KoliciteMn72+Zn4(AsO4)2(SiO4)2(OH)8
17.7.15YeatmaniteZn6Mn92+Sb25+(SiO4)4O12
17.7.16WelshiteCa4Mg9Sb3O4[Si6Be3AlFe2O36]
17.7.17Katoptrite(Mn2+,Mg)13(Al,Fe3+)4Sb25+(SiO4)2O20
17.7.18ParweliteMn10Sb2As2Si2O24
17.7.19Långbanite(Mn2+,Ca)4(Mn3+,Fe3+)9Sb5+(SiO4)2O16
17.7.20ChapmaniteFe23+Sb3+(Si2O5)O3(OH)
17.7.21Cervandonite-(Ce)(Ce,Nd,La)(Fe3+,Fe2+,Ti,Al)3O2(Si2O7)(As3+O3)(OH)

Other Names for Johninnesite

Name in Other Languages:

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.

References for Johninnesite

Reference List:
American Mineralogist (1988): 73: 428.

American Mineralogist (1994): 79: 991-995.

Schweizerische mineralogische und petrographische Mitteilungen (1997): 77: 449-455.

Internet Links for Johninnesite

Localities for Johninnesite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Namibia
 
  • Otjozondjupa Region
    • Grootfontein District
      • Kombat
Mineralogical Magazine (1986): 50, 667-670. Dunn, P.J. (1991), Rare minerals of the Kombat Mine, Mineralogical Record: 22(6): 421-425.
Switzerland
 
  • Grischun (Grisons; Graubünden)
    • Hinterrhein Valley
      • Ferrera Valley
        • Starlera Valley
Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 230.; Brugger J. (1996): The Fe, Mn, (V, Sb, As, Be, W) deposits of Val Ferrera (Graubünden, Switzerland). Unpublished PhD Thesis, Univ. Basel. 188 p.
Mineral and/or Locality  
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