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Lennilenapeite

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Formula:
K6-7(Mg,Mn,Fe,Zn)48(Si,Al)72(O,OH)216 · 16H2O
Hardness:
3
Crystal System:
Triclinic
Name:
Named in 1984 by Pete J. Dunn, Donald R. Peacor, and William B. Simmons for the Lenni Lenape Indian tribe which inhabited the area around Franklin, NJ, USA.
Isostructural with:
This page provides mineralogical data about Lennilenapeite.


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Classification of LennilenapeiteHide

Approved
9.EG.40

9 : SILICATES (Germanates)
E : Phyllosilicates
G : Double nets with 6-membered and larger rings
74.1.1.2

74 : PHYLLOSILICATES Modulated Layers
1 : Modulated Layers with joined islands
16.20.8

16 : Silicates Containing Aluminum and other Metals
20 : Aluminosilicates of Fe, Mg and alkalis

Physical Properties of LennilenapeiteHide

Hardness:

Optical Data of LennilenapeiteHide

Type:
Biaxial (-)
RI values:
nα = 1.553 nβ = 1.594 nγ = 1.594
Max Birefringence:
δ = 0.041
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
none

Chemical Properties of LennilenapeiteHide

Formula:
K6-7(Mg,Mn,Fe,Zn)48(Si,Al)72(O,OH)216 · 16H2O
IMA Formula:
K7(Mg,Mn2+,Fe2+,Zn)48(Si,Al)72(O,OH)216 · 16H2O
Common Impurities:
Ca,Ba,Na

Crystallography of LennilenapeiteHide

Crystal System:
Triclinic
Cell Parameters:
a = 21.91 Å
Unit Cell V:
0.00 ų (Calculated from Unit Cell)

Type Occurrence of LennilenapeiteHide

Synonyms of LennilenapeiteHide

Other Language Names for LennilenapeiteHide

Relationship of Lennilenapeite to other SpeciesHide

Other Members of this group:
ChalcoditeK(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27Mon.
Franklinphilite(K,Na)4(Mn2+,Mg,Zn)48(Si,Al)72(O,OH)216 · 6H2OTric.
Parsettensite(K,Na,Ca)7.5(Mn,Mg)49Si72O168(OH)50 · nH2OMon. 2/m : B2/m
Stilpnomelane(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2OTric. 1 : P1

Common AssociatesHide

Associated Minerals Based on Photo Data:
Sphalerite10 photos of Lennilenapeite associated with Sphalerite on mindat.org.
Calcite9 photos of Lennilenapeite associated with Calcite on mindat.org.
Quartz2 photos of Lennilenapeite associated with Quartz on mindat.org.
Hematite1 photo of Lennilenapeite associated with Hematite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.EG.05CymriteBaAl2Si2(O,OH)8 · H2OMon.
9.EG.10Naujakasite(Na,K)6(Fe2+,Mn2+,Ca)(Al,Fe)4Si8O26Mon. 2/m : B2/m
9.EG.10ManganonaujakasiteNa6(Mn2+,Fe2+)Al4Si8O26Mon.
9.EG.15DmisteinbergiteCa(Al2Si2O8)Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm
9.EG.20KampfiteBa12(Si11Al5)O31(CO3)8Cl5Mon. m
9.EG.25SträtlingiteCa2Al2SiO7 · 8H2OTrig.
9.EG.25VertumniteCa4Al4Si4O6(OH)24 · 3H2OMon. 2/m : P21/m
9.EG.30Eggletonite(Na,K,Ca)2(Mn,Fe)8(Si,Al)12O29(OH)7 · 11H2OMon.
9.EG.30Ganophyllite(K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2OMon.
9.EG.30Tamaite(Ca,K,Ba,Na)3-4Mn24(Si,Al)40(O,OH)112 · 21H2OMon.
9.EG.35CoombsiteK(Mn,Fe,Mg)13(Si,Al)18O42(OH)14Trig.
9.EG.35ZussmaniteK(Fe,Mg,Mn)13(Si,Al)18O42(OH)14Trig. 3 : R3
9.EG.40Franklinphilite(K,Na)4(Mn2+,Mg,Zn)48(Si,Al)72(O,OH)216 · 6H2OTric.
9.EG.40Parsettensite(K,Na,Ca)7.5(Mn,Mg)49Si72O168(OH)50 · nH2OMon. 2/m : B2/m
9.EG.40Stilpnomelane(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2OTric. 1 : P1
9.EG.45Latiumite(Ca,K)4(Si,Al)5O11(SO4,CO3)Mon.
9.EG.45Tuscanite(K(Ca,Na)6(Si,Al)10O22[SO4,CO3,(OH)2] · H2OMon.
9.EG.50JagoitePb18Fe3+4[Si4(Si,Fe3+)6][Pb4Si16(Si,Fe)4]O82Cl6Hex.
9.EG.55WickenburgiteCaPb3Al2Si10O24(OH)6Trig. 3m : P3 1c
9.EG.60HyttsjöitePb18Ba2Ca5Mn2+2Fe3+2Si30O90Cl · 6H2OTrig.
9.EG.65ArmbrusteriteK5Na7Mn15[(Si9O22)4](OH)10 · 4H2OMon. 2/m : B2/m
9.EG.70Britvinite[Pb7(OH)3F(BO3)2(CO3)][Mg4.5(OH)3(Si5O14)]Tric. 1 : P1
9.EG.75Bannisterite(Ca,K,Na)(Mn2+,Fe2+)10(Si,Al)16O38(OH)8 · nH2OMon. 2/m : B2/b

Related Minerals - Dana Grouping (8th Ed.)Hide

74.1.1.1Stilpnomelane(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2OTric. 1 : P1
74.1.1.3Franklinphilite(K,Na)4(Mn2+,Mg,Zn)48(Si,Al)72(O,OH)216 · 6H2OTric.
74.1.1.4Bannisterite(Ca,K,Na)(Mn2+,Fe2+)10(Si,Al)16O38(OH)8 · nH2OMon. 2/m : B2/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

16.20.1Glaucophane◻[Na2][Mg3Al2]Si8O22(OH)2Mon.
16.20.2Sodium-anthophyllite{Na}{Mg2}{Mg5}(AlSi7O22)(OH)2
16.20.3Sodium Gedrite{Na}{Mg2}{Mg3Al2}(Al3Si5O22)(OH)2
16.20.4CrossiteMon.
16.20.5Ferro-eckermanniteNaNa2(Fe2+4Al)Si8O22(OH)2Mon.
16.20.6Wonesite(Na,K)(Mg,Fe,Al)6((Al,Si)4O10)2(OH,F)4Mon. 2/m : B2/m
16.20.9Stilpnomelane(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2OTric. 1 : P1
16.20.10Glauconite(K,Na)(Mg,Fe2+,Fe3+)(Fe3+,Al)(Si,Al)4O10(OH)2Mon. 2/m : B2/m

Other InformationHide

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 LennilenapeiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Canadian Mineralogist (1984): 22: 259-263.
American Mineralogist (1985): 70: 216.

Internet Links for LennilenapeiteHide

Localities for LennilenapeiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Japan
 
  • Honshu Island
    • Chubu Region
      • Gifu Prefecture
Endo, S. (2008) Chigaku Kenkyu, 57, 3-10.
Romania
 
  • Suceava Co.
    • Suceava district
      • Iacobeni (Jakobeny; Jacobeny; Jakabfalva)
http://minerals-of-the-carpathians.eu
USA
 
  • California
    • Mendocino Co.
      • Coastal Range
        • Longvale
          • North of Longvale
Gunnar Farber
  • New Jersey
    • Sussex Co.
      • Franklin Mining District
        • Franklin
Dunn, P.J., et al: Canadian Mineralogist:22:259-263; Dunn(1995):Pt4:474-475.
Mineral and/or Locality  
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