Lennilenapeite (original) (raw)
A valid IMA mineral species
About LennilenapeiteHide
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Formula:
K6-7(Mg,Mn,Fe,Zn)48(Si,Al)72(O,OH)216 · 16H2O
Colour:
Very dark in hand sample, chips are dark brown or light green
Lustre:
Vitreous, Resinous
Name:
Named in 1984 by Pete J. Dunn, Donald R. Peacor, and William B. Simmons for the Lenni Lenape indigenous tribe which inhabited the area around Franklin, N.J., USA. The words "Lenni Lenape" mean "the original people" in the Algonquin language of the time.
This page provides mineralogical data about Lennilenapeite.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:2375:3
0e953d4f-1368-4235-87b7-2ef4e47e19a3
IMA Classification of LennilenapeiteHide
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IMA Formula:
K7(Mg,Mn2+,Fe2+,Zn)48(Si,Al)72(O,OH)216 · 16H2O
Type description reference:
Classification of LennilenapeiteHide
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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
Mineral SymbolsHide
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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.
| Symbol | Source | Reference |
|---|---|---|
| Lnl | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Lnl | Warr (2020) | Warr, L.N. (2020) Recommended abbreviations for the names of clay minerals and associated phases. Clay Minerals, 55, 261–264 doi:10.1180/clm.2020.30 |
Physical Properties of LennilenapeiteHide
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Colour:
Very dark in hand sample, chips are dark brown or light green
Cleavage:
Perfect
Perfect {001} and imperfect nearly perpendicular to (001)
Density:
2.72 g/cm3 (Measured)
Comment:
Measured using heavy-liquid technique
Optical Data of LennilenapeiteHide
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RI values:
_n_α = 1.553(2) _n_β = 1.594(4) _n_γ = 1.594(4)
δ = 0.041
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Comments:
X faint brown to colorless, Y = Z dark brown (type material)
X pale yellow-brown, Y = Z dark olive brown (cotype material)
Chemistry of LennilenapeiteHide
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Mindat Formula:
K6-7(Mg,Mn,Fe,Zn)48(Si,Al)72(O,OH)216 · 16H2O
Common Impurities:
Ca,Ba,Na
Crystallography of LennilenapeiteHide
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Cell Parameters:
a = 21.9(1) Å
Unit Cell V:
0.00 ų (Calculated from Unit Cell)
Comment:
Point Group: n.d; Space Group: n.d.
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 12.11 Å | (100) |
| 2.582 Å | (40) |
| 2.734 Å | (30) |
| 2.365 Å | (30) |
| 1.593 Å | (30) |
| 1.578 Å | (30) |
| 4.07 Å | (20) |
Geological EnvironmentHide
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Type Occurrence of LennilenapeiteHide
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General Appearance of Type Material:
Black, lustrous, in small flattened aggregates that range up to 1 cm across.
Place of Conservation of Type Material:
Holotype and cotype lennilenapeite are in the mineral collection at Harvard University, under catalog numbers H105542 and H108573, respectively.
Associated Minerals at Type Locality:
Reference:
Dunn, P.J., Peacor, D.R., Simmons, W.B. (1984) Lennilenapeite, the Mg-analogue of stilpnomelane, and chemical data on other stilpnomelane species from Franklin, New Jersey. The Canadian Mineralogist: 22: 259-263.
Synonyms of LennilenapeiteHide
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Other Language Names for LennilenapeiteHide
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Relationship of Lennilenapeite to other SpeciesHide
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Other Members of this group:
| Chalcodite | K(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27 | Tric. 1 : _P_1 |
|---|---|---|
| Franklinphilite | (K,Na)4(Mn2+,Mg,Zn)48(Si,Al)72(O,OH)216 · 6H2O | Tric. |
| Parsettensite | (K,Na,Ca)7.5(Mn,Mg)49Si72O168(OH)50 · nH2O | Mon. 2/m : _B_2/m |
| Stilpnomelane | (K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O | Tric. 1 : _P_1 |
Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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| 9.EG.05 | Cymrite | BaAl2Si2(O,OH)8 · H2O | Mon. 2 : _P_21 |
|---|---|---|---|
| 9.EG.10 | Naujakasite | (Na,K)6(Fe2+,Mn2+,Ca)(Al,Fe)4Si8O26 | Mon. |
| 9.EG.10 | Manganonaujakasite | Na6(Mn2+,Fe2+)Al4Si8O26 | Mon. 2/m : _B_2/m |
| 9.EG.15 | Dmisteinbergite | Ca(Al2Si2O8) | Trig. 32 : _P_312 |
| 9.EG.20 | Kampfite | Ba12(Si11Al5)O31(CO3)8Cl5 | Mon. m |
| 9.EG.25 | Vertumnite | Ca4Al4Si4O6(OH)24 · 3H2O | Mon. 2/m : _P_21/m |
| 9.EG.25 | Strätlingite | Ca2Al2SiO7 · 8H2O | Trig. 3_m_ : R_3_m |
| 9.EG.30 | Eggletonite | (Na,K,Ca)2(Mn,Fe)8(Si,Al)12O29(OH)7 · 11H2O | Mon. |
| 9.EG.30 | Ganophyllite | (K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2O | Mon. 2/m |
| 9.EG.30 | Tamaite | (Ca,K,Ba,Na)3-4Mn24(Si,Al)40(O,OH)112 · 21H2O | Mon. 2/m : _P_21/b |
| 9.EG.35 | Zussmanite | K(Fe,Mg,Mn)13(Si,Al)18O42(OH)14 | Trig. 3 : _R_3 |
| 9.EG.35 | Coombsite | KMn2+13(Si,Al)18O42(OH)14 | Trig. |
| 9.EG.40 | Chalcodite | K(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27 | Tric. 1 : _P_1 |
| 9.EG.40 | Parsettensite | (K,Na,Ca)7.5(Mn,Mg)49Si72O168(OH)50 · nH2O | Mon. 2/m : _B_2/m |
| 9.EG.40 | Franklinphilite | (K,Na)4(Mn2+,Mg,Zn)48(Si,Al)72(O,OH)216 · 6H2O | Tric. |
| 9.EG.40 | Stilpnomelane | (K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O | Tric. 1 : _P_1 |
| 9.EG.45 | Latiumite | (Ca,K)4(Si,Al)5O11(SO4,CO3) | Mon. 2 : _P_21 |
| 9.EG.45 | Levantite | KCa3Al2(SiO4)(Si2O7)(PO4) | Mon. 2 : _P_21 |
| 9.EG.45 | Tuscanite | KCa6(Si,Al)10O22(SO4,CO3)2(OH) · H2O | Mon. 2/m : _P_21/b |
| 9.EG.50 | Jagoite | Pb18Fe3+4[Si4(Si,Fe3+)6][Pb4Si16(Si,Fe)4]O82Cl6 | Hex. 6_m_2 : _P_6_c_2 |
| 9.EG.50 | Friisite | Pb8Al3Si8O27Cl3 | Hex. 6_m_2 : P_62_c |
| 9.EG.55 | Wickenburgite | CaPb3Al2Si10O24(OH)6 | Trig. 3_m_ : P_31_c |
| 9.EG.60 | Hyttsjöite | Pb18Ba2Ca5Mn2+2Fe3+2Si30O90Cl · 6H2O | Trig. 3 : _R_3 |
| 9.EG.65 | Armbrusterite | K5Na7Mn15[(Si9O22)4](OH)10 · 4H2O | Mon. 2/m : _B_2/m |
| 9.EG.70 | Roymillerite | Pb24Mg9(Si10O28)(CO3)10(BO3)(SiO4)(OH)13O5 | Tric. 1 : _P_1 |
| 9.EG.70 | Britvinite | [Pb7(OH)3F(BO3)2(CO3)][Mg4.5(OH)3(Si5O14)] | Tric. 1 : _P_1 |
| 9.EG.75 | Kayupovaite | Na2Mn10[(Si14Al2)O38(OH)8] · 7H2O | Mon. 2/m : _B_2/b |
| 9.EG.75 | UM1989-30-SiO:AlBaCaFeHKMgMn | (Ba,Ca)(Mn,Fe,Mg)22(Si,Al)32O76(OH)16 · 12H2O | |
| 9.EG.75 | Bannisterite | (Ca,K,Na)(Mn2+,Fe2+)10(Si,Al)16O38(OH)8 · nH2O | Mon. 2/m : _B_2/b |
Fluorescence of LennilenapeiteHide
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No discernible fluorescence in ultraviolet radiation
Other InformationHide
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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 LennilenapeiteHide
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References for LennilenapeiteHide
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Reference List:
Dunn, Pete J., Chao, George Y., Fleischer, Michael, Ferraiolo, James A., Langley, Richard H., Pabst, Adolf, Zilczer, Janet A. (1985) New mineral names. American Mineralogist, 70 (1-2) 214-221
Localities for LennilenapeiteHide
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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
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