Franklinfurnaceite
A valid IMA mineral species
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About Franklinfurnaceite
Formula:
Ca2Fe3+Mn2+3Mn3+(Zn2Si2O10)(OH)8
Zn is tetrahedrally coordinated.
Colour:
Dark reddish brown to brownish black
Lustre:
Sub-Vitreous, Resinous, Waxy
Hardness:
3
Specific Gravity:
3.66
Crystal System:
Monoclinic
Member of:
Name:
Named in 1987 by Pete J. Dunn, Donald R. Peacor, Robert A. Ramik, Shu-Chun Su, and Roland C. Rouse for an old name of the town, "Franklin Furnace". The town became "Franklin [borough]" on April 23, 1913.
Type Locality:
Isostructural with:
Intergrown clusters or rosettes of dark red brown plates implanted on hodgkinsonite crystals in open cavities. A second much more uncommon find occurred as nearly black filamentous crystals associated with nelenite in open cavities. Franklinfurnaceite has the chlorite group structure, but has unusual chemical composition. It represents the very rare case of a zincosilicate, in which zinc atoms replace Si atoms in (SiO4) tetrahedra (Gaines et al., 1997).
Unique Identifiers
Mindat ID:
1597
Long-form identifier:
mindat:1:1:1597:0
GUID
(UUID V4):
(UUID V4):
ba6107b3-61dd-45d0-9b2f-a634ab3d4676
IMA Classification of Franklinfurnaceite
Approved
IMA Formula:
Ca2Mn2+3Mn3+Fe3+Zn2Si2O10(OH)8
First published:
1987
Classification of Franklinfurnaceite
9.EC.55
9 : SILICATES (Germanates)
E : Phyllosilicates
C : Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets
9 : SILICATES (Germanates)
E : Phyllosilicates
C : Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets
71.4.3.1
71 : PHYLLOSILICATES Sheets of Six-Membered Rings
4 : Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra
71 : PHYLLOSILICATES Sheets of Six-Membered Rings
4 : Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra
14.7.23
14 : Silicates not Containing Aluminum
7 : Silicates of Ba, Sr and Zn
14 : Silicates not Containing Aluminum
7 : Silicates of Ba, Sr and Zn
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Symbol | Source | Reference |
---|---|---|
Fkf | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Fkf | Warr (2020) | Warr, L.N. (2020) Recommended abbreviations for the names of clay minerals and associated phases. Clay Minerals, 55, 261–264 doi:10.1180/clm.2020.30 |
Physical Properties of Franklinfurnaceite
Sub-Vitreous, Resinous, Waxy
Transparency:
Translucent
Comment:
Luster is not vitreous
Colour:
Dark reddish brown to brownish black
Streak:
Dark brown
Hardness:
3 on Mohs scale
Tenacity:
Very brittle
Cleavage:
Perfect
{001}
{001}
Fracture:
Micaceous
Density:
3.66 g/cm3 (Measured) 3.74 g/cm3 (Calculated)
Optical Data of Franklinfurnaceite
Type:
Biaxial (-)
RI values:
nα = 1.792 nβ = 1.798 nγ = 1.802
2V:
Measured: 79° , Calculated: 78°
Birefringence:
0.10
Max Birefringence:
δ = 0.010
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r > v perceptible
Optical Extinction:
Z=b, Y = 29 degrees from c
Pleochroism:
Visible
Comments:
X very dark brown, Z deep brown, Y brown
Chemistry of Franklinfurnaceite
Mindat Formula:
Ca2Fe3+Mn2+3Mn3+(Zn2Si2O10)(OH)8
Zn is tetrahedrally coordinated.
Zn is tetrahedrally coordinated.
Common Impurities:
Mg
Crystallography of Franklinfurnaceite
Crystal System:
Monoclinic
Class (H-M):
2 - Sphenoidal
Space Group:
B2
Cell Parameters:
a = 5.48 Å, b = 9.39 Å, c = 14.51 Å
β = 97.05°
β = 97.05°
Ratio:
a:b:c = 0.584 : 1 : 1.545
Unit Cell V:
741.00 ų (Calculated from Unit Cell)
Morphology:
Platy pseudohexagonal crystals, also plumose to filamentous.
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0001192 | Franklinfurnaceite | Peacor D R, Rouse R C, Bailey S W (1988) Crystal structure of franklinfurnaceite: A tri-dioctahedral zincosilicate intermediate between chlorite and mica American Mineralogist 73 876-887 | 1988 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
14.4 Å | (50) |
3.60 Å | (40) |
3.35 Å | (50) |
3.20 Å | (40) |
2.71 Å | (80) |
2.60 Å | (70) |
2.305 Å | (100) |
1.58 Å | (40) |
Comments:
41-1412
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
High-𝑇 alteration and/or metamorphism | |
32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits |
Type Occurrence of Franklinfurnaceite
General Appearance of Type Material:
Very thin, platy crystal, rarely to 0.3 mm. Sometimes as as polycrystalline aggregates up to 1.0 cm in diameter. Similar in appearance bannisterite and ganophyllite but in a different assemblage.
Place of Conservation of Type Material:
National Museum of Natural History (Smithsonian Institution), Washington, D.C., USA, numbers C06309 and R19144.
Associated Minerals at Type Locality:
Reference:
Dunn, P.J., Peacor, D.R., Ramik, R.A., Su, S., Rouse, R.C. (1987) Franklinfurnaceite, a Ca-Fe3+-Mn3+-Mn2+ zincosilicate isotypic with chlorite, from Franklin, New Jersey. American Mineralogist: 72: 812-815.
Synonyms of Franklinfurnaceite
Other Language Names for Franklinfurnaceite
Relationship of Franklinfurnaceite to other Species
Member of:
Other Members of this group:
Baileychlore | (Zn,Fe2+,Al,Mg)6(Si,Al)4O10(OH)8 | Tric. 1 |
Borocookeite | (LiAl4◻)[BSi3O10](OH)8 | Mon. m : Bb |
Chamosite | (Fe2+)5Al(Si,Al)4O10(OH,O)8 | Mon. 2/m : B2/m |
Clinochlore | Mg5Al(AlSi3O10)(OH)8 | Mon. 2/m : B2/m |
Cookeite | (LiAl4◻)[AlSi3O10](OH)8 | Mon. 2/m |
Donbassite | Al4.33(Si3Al)O10(OH)8 | Mon. 2 : B2 |
Glagolevite | Na(Mg,Al)6(AlSi3O10)(OH,O)8 | Tric. 1 : P1 |
Gonyerite | (Mn2+,Mg)5Fe3+(Fe3+Si3O10)(OH)8 | Orth. |
Nimite | (Ni,Mg,Al)6((Si,Al)4O10)(OH)8 | Mon. 2/m : B2/m |
Pennantite | Mn2+5Al(AlSi3O10)(OH)8 | Tric. |
Sudoite | Mg2Al3(Si3Al)O10)(OH)8 | Mon. 2/m : B2/m |
Common Associates
Associated Minerals Based on Photo Data:
8 photos of Franklinfurnaceite associated with Hodgkinsonite | Mn2+Zn2(SiO4)(OH)2 |
6 photos of Franklinfurnaceite associated with Franklinite | Zn2+Fe3+2O4 |
5 photos of Franklinfurnaceite associated with Baryte | BaSO4 |
5 photos of Franklinfurnaceite associated with Willemite | Zn2SiO4 |
Related Minerals - Strunz-mindat Grouping
9.EC. | Balestraite | KLi2V5+Si4O12 |
9.EC. | Meifuite | KFe6(Si7Al)O19(OH)4Cl2 |
9.EC.05 | Minnesotaite | Fe2+3Si4O10(OH)2 |
9.EC.05 | Talc | Mg3Si4O10(OH)2 |
9.EC.05 | Willemseite | Ni3Si4O10(OH)2 |
9.EC.9.EC. | Voloshinite | Rb(LiAl1.5◻0.5)(Al0.5Si3.5)O10F2 |
9.EC.10 | Ferripyrophyllite | Fe3+Si2O5(OH) |
9.EC.10 | Pyrophyllite | Al2Si4O10(OH)2 |
9.EC.10 | Luanshiweiite | KLiAl1.5(Si3.5Al0.5)O10(OH)2 |
9.EC.10 | Fluorluanshiweiite | KLiAl1.5(Si3.5Al0.5)O10F2 |
9.EC.10 | Manganiceladonite | K(MgMn3+◻)(Si4O10)(OH)2 |
9.EC.10 | Garmite | CsLiMg2(Si4O10)F2 |
9.EC.10 | Gorbunovite | CsLi2(Ti,Fe)Si4O10(F,OH,O)2 |
9.EC.15 | Boromuscovite | KAl2(BSi3O10)(OH)2 |
9.EC.15 | Celadonite | K(MgFe3+◻)(Si4O10)(OH)2 |
9.EC.15 | Chernykhite | (Ba,Na)(V3+,Al,Mg)2((Si,Al)4O10)(OH)2 |
9.EC.15 | Montdorite | (K,Na)2(Fe2+,Mn2+,Mg)5(Si4O10)2(OH,F)4 |
9.EC.15 | Muscovite | KAl2(AlSi3O10)(OH)2 |
9.EC.15 | Nanpingite | CsAl2(AlSi3O10)(OH,F)2 |
9.EC.15 | Paragonite | NaAl2(AlSi3O10)(OH)2 |
9.EC.15 | Roscoelite | K(V3+,Al)2(AlSi3O10)(OH)2 |
9.EC.15 | Tobelite | (NH4,K)Al2(AlSi3O10)(OH)2 |
9.EC.15 | Aluminoceladonite | K(MgAl◻)(Si4O10)(OH)2 |
9.EC.15 | Chromphyllite | K(Cr,Al)2(AlSi3O10)(OH,F)2 |
9.EC.15 | Ferroaluminoceladonite | K(Fe2+Al◻)(Si4O10)(OH)2 |
9.EC.15 | Ferroceladonite | K(Fe2+Fe3+◻)(Si4O10)(OH)2 |
9.EC.15 | Chromceladonite | K(MgCr◻)(Si4O10)(OH)2 |
9.EC.15 | Tainiolite | KLiMg2(Si4O10)F2 |
9.EC.15 | Ganterite | (Ba,Na,K)(Al,Mg)2(AlSi3O10)(OH)2 |
9.EC.15 | UM1988-22-SiO:AlCaFFeHKLiMg | KLiMgAl2Si3O10F2 |
9.EC.15 | Kreiterite | CsLi2Fe3+(Si4O10)F2 |
9.EC.20 | Annite | KFe2+3(AlSi3O10)(OH)2 |
9.EC.20 | Ephesite | NaLiAl2(Al2Si2O10)(OH)2 |
9.EC.20 | Hendricksite | KZn3(Si3Al)O10(OH)2 |
9.EC.20 | Masutomilite | (K,Rb)(Li,Mn3+,Al)3(AlSi3O10)(F,OH)2 |
9.EC.20 | Norrishite | KLiMn3+2(Si4O10)O2 |
9.EC.20 | Phlogopite | KMg3(AlSi3O10)(OH)2 |
9.EC.20 | Polylithionite | KLi2Al(Si4O10)(F,OH)2 |
9.EC.20 | Preiswerkite | NaMg2Al(Al2Si2O10)(OH)2 |
9.EC.20 | Siderophyllite | KFe2+2Al(Al2Si2O10)(OH)2 |
9.EC.20 | Tetraferriphlogopite | KMg3(Fe3+Si3O10)(OH,F)2 |
9.EC.20 | Fluorotetraferriphlogopite | KMg3(Fe3+Si3O10)F2 |
9.EC.20 | Wonesite | (Na,K)(Mg,Fe,Al)6((Al,Si)4O10)2(OH,F)4 |
9.EC.20 | Eastonite | KMg2Al(Al2Si2O10)(OH)2 |
9.EC.20 | Tetraferriannite | KFe2+3(Si3Fe3+)O10(OH)2 |
9.EC.20 | Trilithionite | K(Li1.5Al1.5)(AlSi3O10)(F,OH)2 |
9.EC.20 | Fluorannite | KFe2+3(Si3Al)O10F2 |
9.EC.20 | Shirokshinite | K(NaMg2)(Si4O10)F2 |
9.EC.20 | Shirozulite | KMn2+3(Si3Al)O10(OH)2 |
9.EC.20 | Sokolovaite | CsLi2Al(Si4O10)F2 |
9.EC.20 | Aspidolite | NaMg3(AlSi3O10)(OH)2 |
9.EC.20 | Fluorophlogopite | KMg3(Si3Al)O10F2 |
9.EC.20 | UM2004-49-SiO:AlCsFHKLi | (Cs,K)(Al,Li)2.6((Si,Al)4O10)(F,OH)2 |
9.EC.20 | Suhailite | (NH4)Fe2+3(AlSi3O10)(OH)2 |
9.EC.20 | Yangzhumingite | KMg2.5(Si4O10)F2 |
9.EC.20 | Orlovite | KLi2Ti(Si4O10)OF |
9.EC.20 | Oxyphlogopite | K(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2 |
9.EC.20 | Chloroferrokinoshitalite | (Ba,K)(Fe2+,Mg)3(Al2Si2O10)(Cl,OH,F)2 |
9.EC.22 | Pimelite | Ni3Si4O10(OH)2 · 4H2O |
9.EC.30 | Chlorophaeite | (Ca,Mg,Fe)2Fe2Si4O13 · 10H2O |
9.EC.30 | Margarite | CaAl2(Al2Si2O10)(OH)2 |
9.EC.35 | Anandite | (Ba,K)(Fe2+,Mg)3((Si,Al,Fe)4O10)(S,OH)2 |
9.EC.35 | Bityite | CaLiAl2(AlBeSi2O10)(OH)2 |
9.EC.35 | Clintonite | CaAlMg2(SiAl3O10)(OH)2 |
9.EC.35 | Kinoshitalite | (Ba,K)(Mg,Mn2+,Al)3(Al2Si2O10)(OH)2 |
9.EC.35 | Ferrokinoshitalite | (Ba,K)(Fe2+,Mg)3(Al2Si2O10)(OH,F)2 |
9.EC.35 | Oxykinoshitalite | (Ba,K)(Mg,Ti,Fe3+,Fe2+)3((Si,Al)4O10)(O,OH,F)2 |
9.EC.35 | Fluorokinoshitalite | BaMg3(Al2Si2O10)F2 |
9.EC.40 | Beidellite | (Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O |
9.EC.40 | Kurumsakite | (Zn,Ni,Cu)8Al8V5+2Si5O35 · 27H2O (?) |
9.EC.40 | Montmorillonite | (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O |
9.EC.40 | Nontronite | Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O |
9.EC.40 | Volkonskoite | Ca0.3(Cr,Mg,Fe)2((Si,Al)4O10)(OH)2 · 4H2O |
9.EC.40 | Yakhontovite | (Ca,Na)0.5(Cu,Fe,Mg)2(Si4O10)(OH)2 · 3H2O |
9.EC.45 | Hectorite | Na0.3(Mg,Li)3(Si4O10)(F,OH)2 |
9.EC.45 | Saponite | Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O |
9.EC.45 | Sauconite | Na0.3Zn3((Si,Al)4O10)(OH)2 · 4H2O |
9.EC.45 | Spadaite | MgSiO2(OH)2 · H2O (?) |
9.EC.45 | Stevensite | (Ca,Na)xMg3-x(Si4O10)(OH)2 |
9.EC.45 | Swinefordite | Li(Al,Li,Mg)3((Si,Al)4O10)2(OH,F)4 · nH2O |
9.EC.45 | Zincsilite | Zn3Si4O10(OH)2 · 4H2O (?) |
9.EC.45 | Ferrosaponite | Ca0.3(Fe2+,Mg,Fe3+)3((Si,Al)4O10)(OH)2 · 4H2O |
9.EC.45 | Hanjiangite | Ba2CaV3+Al(H2AlSi3O12)(CO3)2F |
9.EC.50 | Vermiculite | Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O |
9.EC.52 | Tarasovite | near NaKAl11Si13O40(OH)9 · 3H2O |
9.EC.55 | Baileychlore | (Zn,Fe2+,Al,Mg)6(Si,Al)4O10(OH)8 |
9.EC.55 | Chamosite | (Fe2+)5Al(Si,Al)4O10(OH,O)8 |
9.EC.55 | Clinochlore | Mg5Al(AlSi3O10)(OH)8 |
9.EC.55 | Cookeite | (LiAl4◻)[AlSi3O10](OH)8 |
9.EC.55 | Gonyerite | (Mn2+,Mg)5Fe3+(Fe3+Si3O10)(OH)8 |
9.EC.55 | Nimite | (Ni,Mg,Al)6((Si,Al)4O10)(OH)8 |
9.EC.55 | Orthochamosite | (Fe2+,Mg,Fe3+)5Al(AlSi3O10)(OH,O)8 |
9.EC.55 | Pennantite | Mn2+5Al(AlSi3O10)(OH)8 |
9.EC.55 | Sudoite | Mg2Al3(Si3Al)O10)(OH)8 |
9.EC.55 | Donbassite | Al4.33(Si3Al)O10(OH)8 |
9.EC.55 | Glagolevite | Na(Mg,Al)6(AlSi3O10)(OH,O)8 |
9.EC.55 | Borocookeite | (LiAl4◻)[BSi3O10](OH)8 |
9.EC.60 | Aliettite | Ca0.2Mg6((Si,Al)8O20)(OH)4 · 4H2O |
9.EC.60 | Corrensite | (Mg,Fe)9((Si,Al)8O20)(OH)10 · nH2O |
9.EC.60 | Dozyite | Mg7Al2(Al2Si4O15)(OH)12 |
9.EC.60 | Hydrobiotite | K(Mg,Fe2+)6((Si,Al)8O20)(OH)4 · nH2O |
9.EC.60 | Karpinskite | (Ni,Mg)2Si2O5(OH)2 (?) |
9.EC.60 | Kulkeite | Mg8Al(AlSi7O20)(OH)10 |
9.EC.60 | Lunijianlaite | Li0.7Al6.2(AlSi7O20)(OH,O)10 |
9.EC.60 | Rectorite | (Na,Ca)Al4((Si,Al)8O20)(OH)4 · 2H2O |
9.EC.60 | Saliotite | (Li,Na)Al3(AlSi3O10)(OH)5 |
9.EC.60 | Tosudite | Na0.5(Al,Mg)6((Si,Al)8O18)(OH)12 · 5H2O |
9.EC.60 | Brinrobertsite | Na0.3Al4(Si4O10)2(OH)4 · 3.5 H2O |
9.EC.65 | Macaulayite | (Fe,Al)24Si4O43(OH)2 |
9.EC.70 | Burckhardtite | Pb2(Fe3+Te6+)[AlSi3O8]O6 |
9.EC.75 | Ferrisurite | (Pb,Ca)2.4Fe3+2(Si4O10)(CO3)1.7(OH)3 · nH2O |
9.EC.75 | Surite | (Pb,Ca)3(Al,Fe2+,Mg)2((Si,Al)4O10)(CO3)2(OH)2 |
9.EC.75 | Niksergievite | (Ba,Ca)2Al3(AlSi3O10)(CO3)(OH)6 · nH2O |
9.EC.80 | Kegelite | Pb8Al4(Si8O20)(SO4)2(CO3)4(OH)8 |
Fluorescence of Franklinfurnaceite
Not fluorescent.
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Franklinfurnaceite
mindat.org URL:
https://www.mindat.org/min-1597.html
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References for Franklinfurnaceite
Reference List:
Dunn, Pete J., Peacor, Donald R., Ramik, Robert A., Su, Shu-Chun, Rouse, Roland C. (1987) Franklinfurnaceite, a Ca-Fe3+-Mn3+-Mn2+ zincosilicate isotypic with chlorite, from Franklin, New Jersey. American Mineralogist, 72 (7-8) 812-815
Localities for Franklinfurnaceite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
USA (TL) | |
| Dunn et al. (1987) +1 other reference |
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Franklin Mine, Franklin, Sussex County, New Jersey, USA