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Franklinphilite Mineral Data

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General Franklinphilite Information

Help on Chemical  Formula: Chemical Formula: (K,Na)4(Mn++,Mg,Zn)48(Si,Al)72(O,OH)216•6(H2O)
Help on Composition: Composition: Molecular Weight = 8,207.63 gm
   Potassium   1.24 %  K     1.49 % K2O
   Sodium      0.31 %  Na    0.42 % Na2O
   Magnesium   3.91 %  Mg    6.48 % MgO
   Manganese  17.47 %  Mn   22.56 % MnO
   Aluminum    1.91 %  Al    3.60 % Al2O3
   Zinc        4.78 %  Zn    5.95 % ZnO
   Iron        5.51 %  Fe    7.88 % Fe2O3
   Silicon    20.81 %  Si   44.51 % SiO2
   Hydrogen    0.80 %  H     7.11 % H2O
   Oxygen     43.28 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K2.6Na1.1Mn2+26.1Mg13.2Zn6Fe3+2.7Si60.8Al5.8Fe3+5.4O163.2(OH)52.8�6(H2O)
Help on Environment: Environment: Metamorphosed, weathered zinc deposit. The manganese analog of stipnomelane.
Help on IMA Status: IMA Status: Approved IMA 1992
Help on Locality: Locality: Franklin mine, Sussex County, New Jersey. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its locality and from the Greek philos = 'friend.' The 'friends of Franklin' are those scientific investigators who helped study the unique mineralogy and geology of th is deposit.
Help on Name Pronunciation: Name Pronunciation: Franklinphilite + Pronunciation Say FRANKLINPHILITE
Help on Synonym: Synonym: IMA1990-050

Franklinphilite Image

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Comments: A cleavage fragment of nearly pure franklinphilite.
Location: Franklin mine, Sussex County, New Jersey.. Scale: Fragment Size 2.5 mm.
© Jeff Weissman / Photographic Guide to Mineral Species

Franklinphilite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5775:1:3.8253
Help on Cell Dimensions: Cell Dimensions: a = 5.521, b = 9.56, c = 36.57, Z = 0.375; alpha = 90°, beta = 90°, gamma = 90° V = 1,930.19 Den(Calc)= 2.65
Help on Crystal System: Crystal System: Triclinic Space Group: pseudo-HEX P1 or P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 12.3(1), 2.583(0.4), 2.737(0.3),

Physical Properties of Franklinphilite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Dark brown, Black.
Help on Density: Density: 2.6 - 2.8, Average = 2.7
Help on Diaphaneity: Diaphaneity: Subtranslucent to opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 4 - Fluorite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Resinous
Help on Streak: Streak: light brown

Optical Properties of Franklinphilite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.038 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.02 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2152,KPDmeas= 0.2112,KC= 0.2196
Ncalc = 1.57 - 1.61
Help on Optical Data: Optical Data: Biaxial (-), a=1.545, b=1.583, g=1.583, bire=0.0380, 2V(Calc)=0, 2V(Meas)=10.
Help on Pleochroism (x): Pleochroism (x): yellow.
Help on Pleochroism (y): Pleochroism (y): deep brown.
Help on Pleochroism (z): Pleochroism (z): deep brown.

Calculated Properties of Franklinphilite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.60 gm/cc
note: Specific Gravity of Franklinphilite =2.65 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEFranklinphilite = 9.46 barns/electron
U=PEFranklinphilite x relectron= 24.61 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 17.54 (Gamma Ray American Petroleum Institute Units)
Concentration of Franklinphilite per GRapi unit = 5.70 (%)

Estimated Radioactivity from Franklinphilite - barely detectable


Franklinphilite 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 Franklinphilite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(MinRec)
Help on See Also: See Also: Links to other databases for Franklinphilite :
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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