Franklinfurnaceite Mineral Data

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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

Environment:

A late-stage mineral in vugs in a metamorphosed stratiform zinc deposit.

IMA Status:

Approved IMA 1987

Locality:

Franklin Furnace, the former name for Franklin, New Jersey, USA. Link to MinDat.org Location Data.

Name Origin:

Named after the locality.

Name Pronunciation:

Franklinfurnaceite + Pronunciation

Franklinfurnaceite Image

Images:

Franklinfurnaceite

Comments: Brown resinous mass of franklinfurnaceite, in black franklinite, with white calcite.
Location: Franklin Mine, Franklin, Sussex Co., New Jersey, USA. Scale: Picture Size 6 mm.
© Jeff Weissman / Photographic Guide to Mineral Species

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

Diaphaneity:

Translucent

Hardness:

3 - Calcite

Luster:

Vitreous (Glassy)

Streak:

brown

Optical Properties of Franklinfurnaceite

Gladstone-Dale:

CI meas= 0.026 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.041 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2143,KPDmeas= 0.2179,KC= 0.2236
Ncalc = 1.82 - 1.83

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:

Bulk Density (Electron Density)=3.55 gm/cc
note: Specific Gravity of Franklinfurnaceite =3.66 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Franklinfurnaceite}= 17.54 barns/electron
U=PE_{Franklinfurnaceite} x rElectron Density= 62.20 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Franklinfurnaceite is Not Radioactive

Franklinfurnaceite Classification

Dana Class:

71.04.03.01 (71)Phyllosilicate Sheets of Six-Membered Rings

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

(71.04.03)Dana Group

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

Strunz Class:

09.EC.55 09 - SILICATES (Germanates)

09.E - Phyllosilicates

09.EC -Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets

09.EC.55 Donbassite Al2[Al2.33][Si3AlO10](OH)8 C 2/m 2/m

09.EC.55 Baileychlore (Zn,Al,[])3[Fe2Al][Si3AlO10](OH)8 C1,C1 Tri

09.EC.55 Clinochlore (Mg,Fe)5Al(Si3Al)O10(OH)8 C 2/m 2/m

09.EC.55 Cookeite LiAl4(Si3Al)O10(OH)8 P 2₁/a 2/m

09.EC.55 Chamosite (Fe,Mg,Fe)5Al(Si3Al)O10(OH,O)8 C 2/m 2/m

09.EC.55 Franklinfurnaceite Ca2(Fe,Al)MnMn3Zn2Si2O10(OH)8 C 2 2

09.EC.55 Nimite (Ni,Mg,Fe)5Al(Si3Al)O10(OH)8 C 2/m 2/m

09.EC.55 Gonyerite Mn3[Mn3Fe][(Si,Fe)4O10](OH,O)8 pseudo-HEX Ortho

09.EC.55 Odinite (Fe,Mg,Al,Fe,Ti,Mn)2.5(Si,Al)2O5(OH)4 Cm m

09.EC.55 Orthochamosite (Fe,Mg,Fe)5Al(Si3Al)O10(OH,O)8 C3m-pseudoHEX Ortho

09.EC.55 Pennantite Mn5Al(Si3Al)O10(OH)8 C 2/m 2/m

09.EC.55 Sudoite Mg2(Al,Fe)3Si3AlO10(OH)8 C 2/m 2/m

09.EC.55 Glagolevite! NaMg6[Si3AlO10](OH,O)8•H2O C1 1

09.EC.55 Borocookeite! Li(13x)Al(4-x)(BSi3)O10(OH,F)8[x=0-0.33] pseudo C 2/m 2/m

Other Franklinfurnaceite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Am.Min.,Vol.72,p812-815,1987) OPTIC PROP.(Am.Min.,Vol.72,p812-815,1987)

See Also:

Links to other databases for Franklinfurnaceite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - MinMax(Deutsch)
12 - MinMax(English)
13 - Mineralienatlas (Deutsch)
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - WWW-MINCRYST

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Franklinfurnaceite

Ca2(Fe+++,Al)Mn+++Mn++3Zn2Si2O10(OH)8
Dana No: 71.04.03.01 Strunz No: 09.EC.55
Locality:

Notes: