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Lennilenapeite

A valid IMA mineral species

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Photos of Lennilenapeite (8)

Lennilenapeite Gallery Search Photos of Lennilenapeite

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Lennilenapeite, etc.

Franklin Mine, Franklin, Sussex County, New Jersey, USA

Lennilenapeite, etc.

Franklin Mine, Franklin, Sussex County, New Jersey, USA

Lennilenapeite

Franklin, Sussex County, New Jersey, USA

Lennilenapeite, etc.

Franklin Mine, Franklin, Sussex County, New Jersey, USA

Lennilenapeite, etc.

Franklin Mine, Franklin, Sussex County, New Jersey, USA

Lennilenapeite

Franklin, Sussex County, New Jersey, USA

Lennilenapeite, etc.

Franklin Mine, Franklin, Sussex County, New Jersey, USA

Lennilenapeite, etc.

Franklin Mine, Franklin, Sussex County, New Jersey, USA

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About LennilenapeiteHide

Flag of the Lenni Lenape of New Jersey

Formula:

K_6-7(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

Hardness:

Specific Gravity:

2.72

Crystal System:

Triclinic

Member of:

Stilpnomelane Group

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.

Type Locality:

ⓘ Franklin Mine, Franklin, Sussex County, New Jersey, USA

Isostructural with:

Stilpnomelane

This page provides mineralogical data about Lennilenapeite.

Unique IdentifiersHide

Mindat ID:

2375

Long-form identifier:

mindat:1:1:2375:3

GUID
(UUID V4):

0e953d4f-1368-4235-87b7-2ef4e47e19a3

IMA Classification of LennilenapeiteHide

IMA status:

Approved

IMA Formula:

K₇(Mg,Mn²⁺,Fe²⁺,Zn)₄₈(Si,Al)₇₂(O,OH)₂₁₆ · 16H₂O

First published:

1984

Type description reference:

Dunn, Pete J., Peacor, Donald R., Simmons, William B. (1984) Lennilenapeite, the Mg-analogue of stilpnomelane, and chemical data on other stilpnomelane species from Franklin, New Jersey. The Canadian Mineralogist, 22 (2) 259-263

Classification of LennilenapeiteHide

Strunz-mindat (2024):

9.EG.40

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

Dana 8th ed.:

74.1.1.2

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

Hey's CIM Ref.:

16.20.8

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

Mineral SymbolsHide

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

Lustre:

Vitreous, Resinous

Transparency:

Translucent

Colour:

Very dark in hand sample, chips are dark brown or light green

Streak:

Brown

Hardness:

3 on Mohs scale

Tenacity:

Brittle

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

Type:

Biaxial (-)

RI values:

n_α = 1.553(2) n_β = 1.594(4) n_γ = 1.594(4)

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

Pleochroism:

Strong

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

Mindat Formula:

K_6-7(Mg,Mn,Fe,Zn)₄₈(Si,Al)₇₂(O,OH)₂₁₆ · 16H₂O

Elements listed:

Al, Fe, H, K, Mg, Mn, O, Si, Zn - search for minerals with similar chemistry

Common Impurities:

Ca,Ba,Na

Crystallography of LennilenapeiteHide

Crystal System:

Triclinic

Cell Parameters:

a = 21.9(1) Å

Unit Cell V:

0.00 Å³ (Calculated from Unit Cell)

Comment:

Point Group: n.d; Space Group: n.d.

X-Ray Powder DiffractionHide

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

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
High-𝑇 alteration and/or metamorphism
32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits

Type Occurrence of LennilenapeiteHide

Type Locality:

ⓘ Franklin Mine, Franklin, Sussex County, New Jersey, USA

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:

Willemite	Tirodite	Sphalerite	Nelenite	Franklinite
Dolomite

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.

Download:

http://rruff.info/rruff_1.0/uploads/CM22_259.pdf

Synonyms of LennilenapeiteHide

IMA1982-085

Other Language Names for LennilenapeiteHide

German:Lennilenapeit

Spanish:Lennilenapeita

Relationship of Lennilenapeite to other SpeciesHide

Member of:

Stilpnomelane Group

Other Members of this group:

Chalcodite	K(Fe³⁺,Mg,Fe²⁺)₈(Si,Al)₁₂(O,OH)₂₇	Tric. 1 : P1
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 : B2/m
Stilpnomelane	(K,Ca,Na)(Fe,Mg,Al)₈(Si,Al)₁₂(O,OH)₃₆ · nH₂O	Tric. 1 : P1

Common AssociatesHide

Associated Minerals Based on Photo Data:

15 photos of Lennilenapeite associated with Sphalerite	ZnS
15 photos of Lennilenapeite associated with Calcite	CaCO₃
7 photos of Lennilenapeite associated with Hematite	Fe₂O₃
2 photos of Lennilenapeite associated with Quartz	SiO₂
1 photo of Lennilenapeite associated with Dolomite	CaMg(CO₃)₂

Related Minerals - Strunz-mindat Grouping Hide

9.EG.05	Cymrite	BaAl₂Si₂(O,OH)₈ · H₂O	Mon. 2 : P2₁
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 : B2/m
9.EG.15	Dmisteinbergite	Ca(Al₂Si₂O₈)	Trig. 3 2 : P3 1 2
9.EG.20	Kampfite	Ba₁₂(Si₁₁Al₅)O₃₁(CO₃)₈Cl₅	Mon. m
9.EG.25	Strätlingite	Ca₂Al₂SiO₇ · 8H₂O	Trig. 3m : R3m
9.EG.25	Vertumnite	Ca₄Al₄Si₄O₆(OH)₂₄ · 3H₂O	Mon. 2/m : P2₁/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 : P2₁/b
9.EG.35	Coombsite	KMn²⁺₁₃(Si,Al)₁₈O₄₂(OH)₁₄	Trig.
9.EG.35	Zussmanite	K(Fe,Mg,Mn)₁₃(Si,Al)₁₈O₄₂(OH)₁₄	Trig. 3 : R3
9.EG.40	Franklinphilite	(K,Na)₄(Mn²⁺,Mg,Zn)₄₈(Si,Al)₇₂(O,OH)₂₁₆ · 6H₂O	Tric.
9.EG.40	Parsettensite	(K,Na,Ca)_7.5(Mn,Mg)₄₉Si₇₂O₁₆₈(OH)₅₀ · nH₂O	Mon. 2/m : B2/m
9.EG.40	Stilpnomelane	(K,Ca,Na)(Fe,Mg,Al)₈(Si,Al)₁₂(O,OH)₃₆ · nH₂O	Tric. 1 : P1
9.EG.40	Chalcodite	K(Fe³⁺,Mg,Fe²⁺)₈(Si,Al)₁₂(O,OH)₂₇	Tric. 1 : P1
9.EG.45	Latiumite	(Ca,K)₄(Si,Al)₅O₁₁(SO₄,CO₃)	Mon. 2 : P2₁
9.EG.45	Tuscanite	KCa₆(Si,Al)₁₀O₂₂(SO₄,CO₃)₂(OH) · H₂O	Mon. 2/m : P2₁/b
9.EG.45	Levantite	KCa₃Al₂(SiO₄)(Si₂O₇)(PO₄)	Mon. 2 : P2₁
9.EG.50	Jagoite	Pb₁₈Fe³⁺₄[Si₄(Si,Fe³⁺)₆][Pb₄Si₁₆(Si,Fe)₄]O₈₂Cl₆	Hex. 6 m2 : P6c2
9.EG.55	Wickenburgite	CaPb₃Al₂Si₁₀O₂₄(OH)₆	Trig. 3m : P3 1c
9.EG.60	Hyttsjöite	Pb₁₈Ba₂Ca₅Mn²⁺₂Fe³⁺₂Si₃₀O₉₀Cl · 6H₂O	Trig. 3 : R3
9.EG.65	Armbrusterite	K₅Na₇Mn₁₅[(Si₉O₂₂)₄](OH)₁₀ · 4H₂O	Mon. 2/m : B2/m
9.EG.70	Britvinite	[Pb₇(OH)₃F(BO₃)₂(CO₃)][Mg_4.5(OH)₃(Si₅O₁₄)]	Tric. 1 : P1
9.EG.70	Roymillerite	Pb₂₄Mg₉(Si₁₀O₂₈)(CO₃)₁₀(BO₃)(SiO₄)(OH)₁₃O₅	Tric. 1 : P1
9.EG.75	Bannisterite	(Ca,K,Na)(Mn²⁺,Fe²⁺)₁₀(Si,Al)₁₆O₃₈(OH)₈ · nH₂O	Mon. 2/m : B2/b
9.EG.75	UM1989-30-SiO:AlBaCaFeHKMgMn	(Ba,Ca)(Mn,Fe,Mg)₂₂(Si,Al)₃₂O₇₆(OH)₁₆ · 12H₂O
9.EG.75	Kayupovaite	Na₂Mn₁₀[(Si₁₄Al₂)O₃₈(OH)₈] · ₇H₂O	Mon. 2/m : B2/b

Fluorescence of LennilenapeiteHide

In UV light:

No discernible fluorescence in ultraviolet radiation

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.

Internet Links for LennilenapeiteHide

mindat.org URL:

https://www.mindat.org/min-2375.html
Please feel free to link to this page.

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External Links:

Look for Lennilenapeite on Webmineral

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Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

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References for LennilenapeiteHide

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

(2023) Lennilenapeite. Handbook of Mineralogy. Mineralogical Society of America

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 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). ~~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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.


Japan
Gifu Prefecture ⓘ Kamigaito mine ?	Endo (2008)

Romania
Suceava County Iacobeni ⓘ Arșița mine	minerals-of-the-carpathians.eu (2008)
Tolovanu ⓘ Tolovanu (Tolovan) Mn deposit	Hîrtopanu (1997) +1 other reference

USA
California Mendocino County Coastal Range Longvale North of Longvale ⓘ Outlet Creek occurrence	Färber (n.d.)
New Jersey Sussex County Franklin ⓘ Franklin Mine (TL)	Dunn et al. (1984) +1 other reference
ⓘ Buckwheat dump mineral collecting site	King

Lennilenapeite

About LennilenapeiteHide

Unique IdentifiersHide

IMA Classification of LennilenapeiteHide

Classification of LennilenapeiteHide

Mineral SymbolsHide

Physical Properties of LennilenapeiteHide

Optical Data of LennilenapeiteHide

Chemistry of LennilenapeiteHide

Crystallography of LennilenapeiteHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of LennilenapeiteHide

Synonyms of LennilenapeiteHide

Other Language Names for LennilenapeiteHide

Relationship of Lennilenapeite to other SpeciesHide

Common AssociatesHide

Related Minerals - Strunz-mindat GroupingHide

Fluorescence of LennilenapeiteHide

Other InformationHide

Internet Links for LennilenapeiteHide

References for LennilenapeiteHide

Localities for LennilenapeiteHide

Locality ListHide

Related Minerals - Strunz-mindat Grouping Hide