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Roeblingite

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Washington Augustus Roebling
Formula:
Pb2Ca6Mn2+(Si3O9)2(SO4)2(OH)2 · 4H2O
Colour:
White, greyish white
Lustre:
Dull
Hardness:
3
Specific Gravity:
3.433
Crystal System:
Monoclinic
Name:
Named in 1897 by Samuel Lewis Penfield and Harry Ward Foote in honor of Colonel Washington A. Roebling (26 May 1837, Saxonburg, Pennsylvania, USA – 21 July 1926, Trenton, New Jersey, USA), founder of the Mineralogical Society of America, engineer, inventor of the diving bell, builder of the Brooklyn Bridge, and avid mineral collector, donated collection to Smithsonian.
This page provides mineralogical data about Roeblingite.


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Classification of RoeblingiteHide

Approved, 'Grandfathered' (first described prior to 1959)
First Published:
1897
9.CB.05

9 : SILICATES (Germanates)
C : Cyclosilicates
B : [Si3O9]6- 3-membered single rings, with insular complex anions
64.2.2.1

64 : CYCLOSILICATES Rings with Other Anions and Insular Silicate Groups
2 : Rings with Other Anions and Insular Silicate Groups: 3-membered rings with other anion groups
17.10.25

17 : Silicates Containing other Anions
10 : Silicates with sulphate, molybdate or tungstate

Physical Properties of RoeblingiteHide

Transparency:
Transparent, Opaque
Colour:
White, greyish white
Streak:
White
Hardness:
Cleavage:
Perfect
on {001}
Density:
3.433 g/cm3 (Measured)    3.44 g/cm3 (Calculated)

Optical Data of RoeblingiteHide

Type:
Biaxial (+)
RI values:
nα = 1.640 nβ = 1.640 nγ = 1.660
2V:
Measured: 61° (2), Calculated: 61°
Max Birefringence:
δ = 0.020
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
relatively weak r < v

Chemical Properties of RoeblingiteHide

Formula:
Pb2Ca6Mn2+(Si3O9)2(SO4)2(OH)2 · 4H2O
IMA Formula:
Ca6Mn2+Pb2(Si3O9)2(SO4)2(OH)2 · 4H2O
Common Impurities:
Sr,Na,K,C

Crystallography of RoeblingiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Cell Parameters:
a = 13.208 Å, b = 8.287 Å, c = 13.089 Å
β = 106.65°
Ratio:
a:b:c = 1.594 : 1 : 1.579
Unit Cell V:
1,372.59 ų (Calculated from Unit Cell)
Z:
2
Morphology:
As dense, compact masses of tiny lathlike crystals.

Type Occurrence of RoeblingiteHide

General Appearance of Type Material:
Porcelanous
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, R8824,124351.
The Natural History Museum, London, England, 1925,69.
Geological Setting of Type Material:
highly altered (metasomatized) zone in a zinc-manganese-iron silicate-oxide orebody
Associated Minerals at Type Locality:

Other Language Names for RoeblingiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Hendricksite23 photos of Roeblingite associated with Hendricksite on mindat.org.
Xonotlite19 photos of Roeblingite associated with Xonotlite on mindat.org.
Clinohedrite18 photos of Roeblingite associated with Clinohedrite on mindat.org.
Ganophyllite18 photos of Roeblingite associated with Ganophyllite on mindat.org.
Hancockite7 photos of Roeblingite associated with Hancockite on mindat.org.
Willemite6 photos of Roeblingite associated with Willemite on mindat.org.
Pennantite2 photos of Roeblingite associated with Pennantite on mindat.org.
Charlesite2 photos of Roeblingite associated with Charlesite on mindat.org.
Thomsonite1 photo of Roeblingite associated with Thomsonite on mindat.org.
Copper1 photo of Roeblingite associated with Copper on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.CB.10Diversilite-(Ce)Na2(Ba,K)6Fe2+Ce2Ti3(Si3O9)3(HSiO4)3(OH,H2O)9Trig. 3
9.CB.15Ilímaussite-(Ce)(Na,K)7-8(Ba,K)10Ce5(Nb,Ti)6(Si3O9)4(Si9O18)O6(O,OH)24Trig. 3 2 : R3 2

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

17.10.1NoseanNa8(Al6Si6O24)(SO4) · H2OIso. 4 3m : P4 3n
17.10.2PitiglianoiteNa6K2(Al6Si6O24)(SO4) · 2H2OHex.
17.10.3Vishnevite(Na,K)8(Al6Si6O24)(SO4,CO3) · 2H2OHex. 6 : P63
17.10.4Haüyne(Na,K)3(Ca,Na)(Al3Si3O12)(SO4,S,Cl)Iso. 4 3m : P4 3n
17.10.5Liottite(Na,K)16Ca8(Al6Si6O24)3(SO4)5Cl4Hex.
17.10.6Latiumite(Ca,K)4(Si,Al)5O11(SO4,CO3)Mon.
17.10.7Tuscanite(K(Ca,Na)6(Si,Al)10O22[SO4,CO3,(OH)2] · H2OMon.
17.10.8MicrosommiteNa4K2Ca2(Al6Si6O24)(SO4)Cl2Hex.
17.10.9Delhayelite(Na,K)10Ca5Al6Si32O80(Cl2,F2,SO4)3 · 18H2OOrth.
17.10.10HydrodelhayeliteKCa2AlSi7O17(OH)2 · 6H2OOrth.
17.10.11Davyne(Na,K)6Ca2(Al6Si6O24)(Cl2,SO4)2Hex. 6/m : P63/m
17.10.12Afghanite(Na,K)22Ca10(Si24Al24O96)(SO4)6Cl6Trig. 3m : P3 1c
17.10.13Franzinite(Na,K)6Ca2(Al6Si6O24)(SO4)2 · 0.5H2OHex.
17.10.14Giuseppettite(Na,K,Ca)7-8(Al6Si6O24)(SO4,Cl)1-2Hex.
17.10.15Sacrofanite(Na61K19Ca32)(Si84Al84O336)(SO4)26Cl2F6•2H2OHex.
17.10.16Chessexite(Na,K)4Ca2(Mg,Zn)3Al8(SO4)10(SiO4)2 · 40H2OOrth.
17.10.17InneliteNa2CaBa4Ti3(Si2O7)2(SO4)2O4Tric.
17.10.18ThaumasiteCa3(SO4)[Si(OH)6](CO3) · 12H2OHex. 6 : P63
17.10.19Ellestadite
17.10.20ChlorellestaditeCa5(SiO4)1.5(SO4)1.5ClHex. 6/m : P63/m
17.10.21HydroxylellestaditeCa5(SiO4)1.5(SO4)1.5(OH)Hex. 6/mmm (6/m 2/m 2/m) : P63/mcm
17.10.22FluorellestaditeCa5(SiO4)1.5(SO4)1.5FHex.
17.10.23MattheddleitePb5(SiO4)1.5(SO4)1.5(Cl,OH)Hex. 6/m : P63/m
17.10.24QueititePb4Zn2(SO4)(SiO4)(Si2O7)Mon. 2 : P21
17.10.26YoshimuraiteBa2Mn2Ti(Si2O7)(PO4)O(OH)Tric. 1 : P1
17.10.27KegelitePb8Al4(Si8O20)(SO4)2(CO3)4(OH)8Mon.
17.10.28Wenkite(Ba,K)4(Ca,Na)6[(SO4)3|(Si,Al)20O39(OH)2] · 0.5H2OHex.
17.10.29MacquartiteCu2Pb7(CrO4)4(SiO4)2(OH)2Mon.
17.10.30WeliniteMn2+6(W6+,Mg)2(SiO4)2(O,OH)6Trig. 3 : P3

Fluorescence of RoeblingiteHide

Dull red (SW UV)

Other InformationHide

Health Risks:
Contains Pb

References for RoeblingiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Penfield, S.L., Foote, H.W. (1897) On roeblingite, a new silicate from Franklin Furnace, N. J., containing sulphur dioxide and lead. American Journal of Science: 153: 413-415.
Blix, R. (1931) The chemical composition of roeblingite. American Mineralogist: 16: 455-460.
Palache, C. (1935), USGS PP 180: 113.
Hurlbut, C.S., Jr., Baum, J.L. (1960) Ettringite from Franklin, New Jersey. American Mineralogist: 45: 1137-1143.
Foit, F.F. (1966) New data on roeblingite. American Mineralogist: 51: 504-508.
Dunn, P.J., Cabri, L.J., Clark, A.M., Fleischer, M. (1983) New mineral names. American Mineralogist: 68: 849-852.
Dunn, P.J. (1983) Pyrobelonite from Franklin, New Jersey. Mineralogical Record: 14: 203-204.
Moore, P.B., Shen, J. (1984) Roeblingite, Pb2Ca6(SO4)2(OH)2(H2O)4[Mn(Si3O9)2]: its crystal structure and comments on the lone pair effect. American Mineralogist: 69: 1173-1179.
Dunn, P.J. (1985) The lead silicates from Franklin, New Jersey: occurrence and composition. Mineralogical Magazine: 49: 721-727.
Braithwaite, R.S.W. (1985) Roeblingite: a revised formula from infra-red and thermal analysis data. Mineralogical Magazine: 49: 756-758.
Dunn, P.J. (1995) Franklin and Sterling Hill New Jersey: the world's most magnificent mineral deposits, part 4: 503.

Internet Links for RoeblingiteHide

Localities for RoeblingiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Sweden
 
  • Värmland
    • Filipstad
Nysten, P., Holtstam, D. and Jonsson, E. (1999) The Långban minerals. In Långban - The mines,their minerals, geology and explorers (D. Holtstam and J. Langhof, eds.), Swedish Museum of Natural History and Raster Förlag, Stockholm & Chr. Weise Verlag, Munich, pp. 89-183.
USA
 
  • New Jersey
    • Sussex Co.
      • Franklin Mining District
        • Franklin
Dunn, P.J.: Min.Rec.:14:203-204 (1983); Hurlbut, C.S., Jr. & Baum, J.L.: Am.Min.:45:1137-1143 (1960); Palache(1935):113; Dunn(1995):Pt4:503.
FOMS Millsite Committee (1986) (circa), List of Mineral Species Found on the Franklin Mill Site, Franklin-Ogdensburg Mineralogical Society (unpublished).
Palache(1935):113; Dunn(1995):Pt4:503.
Mineral and/or Locality  
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