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Lennilenapeite Mineral Data

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General Lennilenapeite Information

Help on Chemical  Formula: Chemical Formula: K6-7(Mg,Mn,Fe++,Fe+++,Zn)48(Si,Al)72(O,OH)216•16(H2O)
Help on Composition: Composition: Molecular Weight = 8,425.53 gm
   Potassium   2.51 %  K     3.02 % K2O
   Barium      1.14 %  Ba    1.27 % BaO
   Sodium      0.14 %  Na    0.18 % Na2O
   Magnesium   4.21 %  Mg    6.98 % MgO
   Manganese   9.00 %  Mn   11.62 % MnO
   Aluminum    2.85 %  Al    5.39 % Al2O3
   Zinc        5.04 %  Zn    6.28 % ZnO
   Iron        9.15 %  Fe    6.40 % FeO /  5.97 % Fe2O3
   Silicon    20.80 %  Si   44.50 % SiO2
   Hydrogen    0.94 %  H     8.39 % H2O
   Oxygen     44.23 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K5.4Ba0.7Na0.5Mg14.6Mn2+13.8Fe2+7.5Zn6.5Fe3+5.6Si62.4Al8.9Fe3+0.7O171.3(OH)44.7�16.9(H2O)
Help on Environment: Environment: Primary and late stage mineral in a metamorphosed zinc deposit.
Help on IMA Status: IMA Status: Approved IMA 1984
Help on Locality: Locality: Franklin, Sussex County, New Jersey, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the Lenni Lenape Native American tribe, who first inhabited the type locality region.
Help on Name Pronunciation: Name Pronunciation: Lennilenapeite + Pronunciation Say LENNILENAPEITE

Lennilenapeite Image

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Comments: Dark greenish brown sub-metallic micaceous lennilenapeite in white calcite.
Location: Franklin, Sussex County, New Jersey, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Lennilenapeite Crystallography

Help on Crystal System: Crystal System: Triclinic Space Group: Unk (pseudo-HEX)
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 12.11(1), 2.582(0.4), 1.578(0.3),

Physical Properties of Lennilenapeite

Help on Cleavage: Cleavage: {001} Perfect, {1} Indistinct
Help on Color: Color: Brownish black, Green, Light green, Dark brown.
Help on Density: Density: 2.72
Help on Diaphaneity: Diaphaneity: Translucent to opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Vitreous - Resinous
Help on Streak: Streak: brown

Optical Properties of Lennilenapeite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.02 (Excellent) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.2134,KC= 0.2178
Ncalc = 1.59
Help on Optical Data: Optical Data: Biaxial (-), a=1.553, b=1.594, g=1.594, bire=0.0410, 2V(Calc)=0, 2V(Meas)=0.
Help on Pleochroism (x): Pleochroism (x): pale brown or colorless.
Help on Pleochroism (y): Pleochroism (y): dark brown or dark brown.
Help on Pleochroism (z): Pleochroism (z): dark brown or dark brown.

Calculated Properties of Lennilenapeite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.68 gm/cc
note: Specific Gravity of Lennilenapeite =2.72 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PELennilenapeite = 13.30 barns/electron
U=PELennilenapeite x relectron= 35.67 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 35.62 (Gamma Ray American Petroleum Institute Units)
Concentration of Lennilenapeite per GRapi unit = 2.81 (%)

Estimated Radioactivity from Lennilenapeite - barely detectable


Lennilenapeite Classification

Help on  Dana Class: Dana Class: (74)Phyllosilicate Modulated Layers
  (74.01)with joined islands
  (74.01.01)Stilpnomelane group Stilpnomelane K(Fe,Mg,Fe)8(Si,Al)12(O,OH)27•n(H2O) P1 1 Lennilenapeite K6-7(Mg,Mn,Fe,Fe,Zn)48(Si,Al)72(O,OH)216•16(H2O) Unk (pseudo-HEX) Tri Franklinphilite (K,Na)4(Mn,Mg,Zn)48(Si,Al)72(O,OH)216•6(H2O) pseudo-HEX P1 or P1 Tri Bannisterite KCa(Mn,Fe,Zn,Mg)21(Si,Al)32O76(OH)16•4-12(H2O) A2/a 2/m Middendorfite! K3Na2Mn5Si12(O,OH)36•2H2O P 21/m or P 21 Mono
Help on  Strunz Class: Strunz Class: 09.EG.40 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EG -Double nets with 6-membered and larger rings
09.EG.40 Franklinphilite (K,Na)4(Mn,Mg,Zn)48(Si,Al)72(O,OH)216•6(H2O) pseudo-HEX P1 or P1 Tri
09.EG.40 Ekmanite? (Fe,Mg,Mn,Fe)3(Si,Al)4O10(OH)2•2(H2O) Unk Ortho
09.EG.40 Lennilenapeite K6-7(Mg,Mn,Fe,Fe,Zn)48(Si,Al)72(O,OH)216•16(H2O) Unk (pseudo-HEX) Tri
09.EG.40 Parsettensite (K,Na,Ca)(Mn,Al)7Si8O20(OH)8•2(H2O)(?) C 2/m 2/m
09.EG.40 Stilpnomelane K(Fe,Mg,Fe)8(Si,Al)12(O,OH)27•n(H2O) P1 1

Other Lennilenapeite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Lennilenapeite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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Dana No: Strunz No: 09.EG.40





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