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Lennilenapeite

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Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA
© Christopher O'Neill

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Formula:
K
 
6-7
(Mg,Mn,Fe,Zn)
 
48
(Si,Al)
 
72
(O,OH)
 
216
 · 16H
 
2
O
System:TriclinicHardness:3
Name:After the Lenni Lenape Indian tribe which inhabited the area around Franklin, NJ.
This page provides mineralogical data about Lennilenapeite.

Classification of Lennilenapeite

IMA status:Approved
Strunz 8th edition ID:8/H.17-30
Nickel-Strunz 10th (pending) edition ID:9.EG.40

9 : SILICATES (Germanates)
E : Phyllosilicates
G : Double nets with 6-membered and larger rings
Dana 8th edition ID: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
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Type Occurrence of Lennilenapeite

Type Locality:Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA
Year of Discovery:1984

Physical Properties of Lennilenapeite

Hardness (Mohs):3

Crystallography of Lennilenapeite

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

Optical Data of Lennilenapeite

Type:Biaxial (-)
RI values: nα = 1.553 nβ = 1.594 nγ = 1.594
Maximum Birefringence:δ = 0.041

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:none

Chemical Properties of Lennilenapeite

Formula:
K
 
6-7
(Mg,Mn,Fe,Zn)
 
48
(Si,Al)
 
72
(O,OH)
 
216
 · 16H
 
2
O
Essential elements:H, K, Mg, O, Si
All elements listed in formula:Al, Fe, H, K, Mg, Mn, O, Si, Zn
Common Impurities:Ca,Ba,Na

Relationship of Lennilenapeite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.EG.05Cymrite
BaAl
 
2
Si
 
2
(O,OH)
 
8
 · H
 
2
O
9.EG.10Naujakasite
(Na,K)
 
6
(Fe
2+
 
,Mn
2+
 
,Ca)(Al,Fe)
 
4
Si
 
8
O
 
26
9.EG.10Manganonaujakasite
Na
 
6
(Mn
2+
 
,Fe
2+
 
)Al
 
4
Si
 
8
O
 
26
9.EG.15Dmisteinbergite
CaAl
 
2
Si
 
2
O
 
8
9.EG.20Kampfite
Ba
 
12
(Si
 
11
Al
 
5
)O
 
31
(CO
 
3
)
 
8
Cl
 
5
9.EG.25Strätlingite
Ca
 
2
Al
 
2
SiO
 
7
 · 8H
 
2
O
9.EG.25Vertumnite
Ca
 
4
Al
 
4
Si
 
4
O
 
6
(OH)
 
24
 · 3H
 
2
O
9.EG.30Eggletonite
(Na,K,Ca)
 
2
(Mn,Fe)
 
8
(Si,Al)
 
12
O
 
29
(OH)
 
7
 · 11H
 
2
O
9.EG.30Ganophyllite
(K,Na,Ca)
 
2
Mn
 
8
(Si,Al)
 
12
(O,OH)
 
32
 · 8H
 
2
O
9.EG.30Tamaite
(Ca,K,Ba,Na)
 
3-4
Mn
 
24
(Si,Al)
 
40
(O,OH)
 
112
 · 21H
 
2
O
9.EG.35Coombsite
K(Mn,Fe,Mg)
 
13
(Si,Al)
 
18
O
 
42
(OH)
 
14
9.EG.35Zussmanite
K(Fe,Mg,Mn)
 
13
(Si,Al)
 
18
O
 
42
(OH)
 
14
9.EG.40Franklinphilite
(K,Na)
 
4
(Mn,Zn,Mg,Fe)
 
48
(Si,Al)
 
72
(O,OH)
 
216
 · 6H
 
2
O
9.EG.40Parsettensite
K
 
1.2
Mn
 
8
(Si,Al)
 
12
O
 
26
(OH)
 
10
9.EG.40Stilpnomelane
(K,Ca,Na)(Fe
2+
 
,Mg,Al,Fe
3+
 
)
 
8
(Si,Al)
 
12
(O,OH)
 
36
 · nH
 
2
O
9.EG.45Latiumite
K
 
2
Ca
 
6
(Si,Al)
 
11
O
 
25
(SO
 
4
,CO
 
3
)
9.EG.45Tuscanite
(K(Ca,Na)
 
6
(Si,Al)
 
10
O
 
22
[SO
 
4
,CO
 
3
,(OH)
 
2
] · H
 
2
O
9.EG.50Jagoite
(Pb,Ca)
 
3
FeSi
 
3
O
 
10
(Cl,OH)
9.EG.55Wickenburgite
CaPb
 
3
Al
 
2
Si
 
10
O
 
24
(OH)
 
6
9.EG.60Hyttsjöite
Pb
 
18
Ba
 
2
Ca
 
5
Mn
2+
2
Fe
3+
2
Si
 
30
O
 
90
Cl · 6H
 
2
O
9.EG.65Armbrusterite
K
 
5
Na
 
7
Mn
 
15
[(Si
 
9
O
 
22
)
 
4
](OH)
 
10
 · 4H
 
2
O
9.EG.70Britvinite
[Pb
 
7
(OH)
 
3
F(BO
 
3
)
 
2
(CO
 
3
)][Mg
 
4.5
(OH)
 
3
(Si
 
5
O
 
14
)]
9.EG.75Bannisterite
Ca
 
0.5
(K,Na)
 
0.5
(Mn,Fe,Zn)
 
10
(Si,Al)
 
16
O
 
38
(OH)
 
8
 · 5.5H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
16.20.1Glaucophane
◻[Na
 
2
][Mg
 
3
Al
 
2
]Si
 
8
O
 
22
(OH)
 
2
16.20.2Sodium-anthophyllite
16.20.3Sodium Gedrite
16.20.4Crossite
16.20.5Ferro-eckermannite
NaNa
 
2
(Fe
2+
 
,
 
4
Al)Si
 
8
O
 
22
(OH)
 
2
16.20.6Wonesite
(Na,K)(Mg,Fe,Al)
 
6
((Al,Si)
 
4
O
 
10
)
 
2
(OH,F)
 
4
16.20.9Stilpnomelane
(K,Ca,Na)(Fe
2+
 
,Mg,Al,Fe
3+
 
)
 
8
(Si,Al)
 
12
(O,OH)
 
36
 · nH
 
2
O
16.20.10Glauconite
(K,Na)(Fe
3+
 
,Al,Mg)
 
2
((Si,Al)
 
4
O
 
10
)(OH)
 
2

Other Names for Lennilenapeite

Synonyms:
IMA1982-085
Other Languages:
German:Lennilenapeit
Spanish:Lennilenapeita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Lennilenapeite

Reference List:

- +
Canadian Mineralogist (1984): 22: 259-263.

American Mineralogist (1985): 70: 216.

Internet Links for Lennilenapeite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Lennilenapeite details from Handbook of Mineralogy (PDF)
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    • Localities for Lennilenapeite

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? 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.
    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: Can.Min.:22:259-263; Dunn(1995):Pt4:474-475.
    Mineral and/or Locality
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