Franklinfurnaceite Mineral Data

Franklinfurnaceite Mineral Data +

General Franklinfurnaceite Information

Chemical Formula:

Ca2(Fe+++,Al)Mn+++Mn++3Zn2Si2O10(OH)8

Composition:

Molecular Weight = 831.54 gm

Calcium 9.64 % Ca 13.49 % CaO

Manganese 26.43 % Mn 25.59 % MnO / 9.49 % Mn₂O₃

Aluminum 0.81 % Al 1.53 % Al₂O₃

Zinc 15.73 % Zn 19.58 % ZnO

Iron 5.04 % Fe 7.20 % Fe₂O₃

Silicon 6.76 % Si 14.45 % SiO₂

Hydrogen 0.97 % H 8.67 % H₂O

Oxygen 34.63 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₂Fe³⁺_0.75Al_0.25Mn³⁺Mn²⁺₃Zn₂Si₂O₁₀(OH)₈

IMA Status:

Approved IMA 1987

Locality:

Link to MinDat.org Location Data.

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Franklinfurnaceite Crystallography

Axial Ratios:

a:b:c =0.5839:1:1.5452

Cell Dimensions:

a = 5.483, b = 9.39, c = 14.51, Z = 2; beta = 97.04° V = 741.42 Den(Calc)= 3.72

Crystal System:

Monoclinic - SphenoidalH-M Symbol (2) Space Group: C 2

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.305(1), 2.707(0.8), 2.602(0.7),

Crystal Structure:

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Peacor D R , Rouse R C , Bailey S W , American Mineralogist , 73 (1988) p.876-887, Crystal structure of franklinfurnaceite: A tri-dioctahedral zincosilicate, intermediate between chlorite and mica

Physical Properties of Franklinfurnaceite

Cleavage:

[???] Perfect

Color:

Dark brown.

Density:

3.66

Diaphaniety:

Translucent

Hardness:

3 - Calcite

Luster:

Vitreous (Glassy)

Streak:

brown

Optical Properties of Franklinfurnaceite

Optical Data:

Biaxial (-), a=1.792, b=1.798, g=1.802, bire=0.0100, 2V(Calc)=78, 2V(Meas)=79.

Calculated Properties of Franklinfurnaceite

Electron Density:

r_electron=3.60 gm/cc
note: r_{Franklinfurnaceite}=3.72 gm/cc.

Fermion Index

Fermion Index = 0.01096
Boson Index = 0.98904

Photoelectric:

PE_{Franklinfurnaceite}= 17.54 barns/electron
U=PE_{Franklinfurnaceite} x r_electron= 63.22 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Franklinfurnaceite is Not Radioactive

Franklinfurnaceite Classification

Dana Class:

71.4.3.1 (71)Phyllosilicate Sheets of Six-Membered Rings

(71.4)interlayered 1:1, 2:1, and octahedra

(71.4.3)Dana Group

71.4.3.1 Franklinfurnaceite Ca2(Fe,Al)MnMn3Zn2Si2O10(OH)8 C 2 2

Strunz Class:

VIII/H.23-110 VIII - Silicates

VIII/H - Phyllosilicates (layered) Mica like with [Si4O10]4- and related groups

VIII/H.23 - Chlorite group

VIII/H.23-10 Sudoite Mg2(Al,Fe)3Si3AlO10(OH)8 C 2/m 2/m

VIII/H.23-20 Clinochlore (Mg,Fe)5Al(Si3Al)O10(OH)8 C 2/m 2/m

VIII/H.23-30 Chamosite (Fe,Mg,Fe)5Al(Si3Al)O10(OH,O)8 C 2/m 2/m

VIII/H.23-40 Orthochamosite (Fe,Mg,Fe)5Al(Si3Al)O10(OH,O)8 C3m-pseudoHEX Ortho

VIII/H.23-50 Baileychlore (Zn,Al,[])3[Fe2Al][Si3AlO10](OH)8 C1,C1 Tri

VIII/H.23-60 Pennantite Mn5Al(Si3Al)O10(OH)8 C 2/m 2/m

VIII/H.23-70 Nimite (Ni,Mg,Fe)5Al(Si3Al)O10(OH)8 C 2/m 2/m

VIII/H.23-80 Gonyerite Mn3[Mn3Fe][(Si,Fe)4O10](OH,O)8 pseudo-HEX Ortho

VIII/H.23-90 Cookeite LiAl4(Si3Al)O10(OH)8 P 2₁/a 2/m

VIII/H.23-95 Borocookeite! Li(13x)Al(4-x)(BSi3)O10(OH,F)8[x=0-0.33] pseudo C 2/m 2/m

VIII/H.23-100 Manandonite Li2Al4[(Si2AlB)O10](OH)8 C1 1

VIII/H.23-110 Franklinfurnaceite Ca2(Fe,Al)MnMn3Zn2Si2O10(OH)8 C 2 2

Other Franklinfurnaceite Information

References:

PHYS. PROP.(Am.Min.,Vol.72,p812-815,1987) OPTIC PROP.(Am.Min.,Vol.72,p812-815,1987)

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Franklinfurnaceite

Ca2(Fe+++,Al)Mn+++Mn++3Zn2Si2O10(OH)8
Dana No: 71.4.3.1 Strunz No: VIII/H.23-110
Locality:

Notes: