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Franklinphilite

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Franklin, Franklin Mining District, Sussex Co., New Jersey, USA
© 2007, JGW

Formula:
(K,Na)
 
4
(Mn,Zn,Mg,Fe)
 
48
(Si,Al)
 
72
(O,OH)
 
216
·6H
 
2
O
System:TriclinicColour:Dark brown
Hardness:4
This page provides mineralogical data about Franklinphilite.

Classification of Franklinphilite

IMA status:Approved
Strunz 8th edition ID:8/H.17-45
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:74.1.1.3

74 : PHYLLOSILICATES Modulated Layers
1 : Modulated Layers with joined islands
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Type Occurrence of Franklinphilite

Type Locality:Buckwheat Pit (Southwest Opening; Buckwheat Mine), Franklin, Franklin Mining District, Sussex Co., New Jersey, USA
Year of Discovery:1992

Physical Properties of Franklinphilite

Colour:Dark brown
Hardness (Mohs):4

Crystallography of Franklinphilite

Crystal System:Triclinic
Cell Parameters:a = 5.52Å, b = 9.56Å, c = 36.57Å
Ratio:a:b:c = 0.577 : 1 : 3.825
Unit Cell Volume:V 0.00 ų (Calculated from Unit Cell)

Optical Data of Franklinphilite

Type:Biaxial (-)
RI values: nα = 1.545 nβ = 1.583 nγ = 1.583
2V:Measured: 10°
Maximum Birefringence:δ = 0.038

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r > v distinct

Chemical Properties of Franklinphilite

Formula:
(K,Na)
 
4
(Mn,Zn,Mg,Fe)
 
48
(Si,Al)
 
72
(O,OH)
 
216
·6H
 
2
O
Essential elements:H, K, Mn, O, Si
All elements listed in formula:Al, Fe, H, K, Mg, Mn, Na, O, Si, Zn

Relationship of Franklinphilite 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
Ca[Al
 
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.40Lennilenapeite
K
 
6-7
(Mg,Mn,Fe,Zn)
 
48
(Si,Al)
 
72
(O,OH)
 
216
·16H
 
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
[(OH)
 
10
|(Si
 
9
O
 
22
)
 
4
] · 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

Other Names for Franklinphilite

Synonyms:
IMA1990-050
Other Languages:
German:Franklinphilit
Spanish:Franklinphilita

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 Franklinphilite

Reference List:New Minerals (1997), New Minerals 1990-1994.

Mineralogical Record: 23: 465-468.

Internet Links for Franklinphilite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Franklinphilite in the Natural History Museum (London) online catalogue
  • Franklinphilite details from Handbook of Mineralogy (PDF)
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    Localities for Franklinphilite

    (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.
    USA
     
    • New Jersey
      • Sussex Co.
        • Franklin Mining District
          • Franklin
    		Dunn, et al: Franklinphilite, the manganese analog of stilpnomelane, from Franklin, NJ: Min. Rec.:23:465-468 (1992); Dunn(1995):Pt4:472.
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 20th Oct 2009 20:30:39