Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat Articles
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery


This page is currently not sponsored. Click here to sponsor this page.
Hide all sections | Show all sections

About RoeblingiteHide

Washington Augustus Roebling
Pb2Ca6Mn2+(Si3O9)2(SO4)2(OH)2 · 4H2O
White, greyish white
Specific Gravity:
Crystal System:
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.

Classification of RoeblingiteHide

Approved, 'Grandfathered' (first described prior to 1959)
First Published:

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

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

Physical Properties of RoeblingiteHide

Transparent, Opaque
White, greyish white
on {001}
3.433 g/cm3 (Measured)    3.44 g/cm3 (Calculated)

Optical Data of RoeblingiteHide

Biaxial (+)
RI values:
nα = 1.640 nβ = 1.640 nγ = 1.660
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:
relatively weak r < v

Chemical Properties of RoeblingiteHide

Pb2Ca6Mn2+(Si3O9)2(SO4)2(OH)2 · 4H2O
IMA Formula:
Ca6Mn2+Pb2(Si3O9)2(SO4)2(OH)2 · 4H2O
Common Impurities:

Crystallography of RoeblingiteHide

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

Type Occurrence of RoeblingiteHide

General Appearance of Type Material:
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
17.10.7Tuscanite(K(Ca,Na)6(Si,Al)10O22[SO4,CO3,(OH)2] · H2OMon.
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.
17.10.16Chessexite(Na,K)4Ca2(Mg,Zn)3Al8(SO4)10(SiO4)2 · 40H2OOrth.
17.10.17InneliteNa2CaBa4Ti3(Si2O7)2(SO4)2O4Tric. 1 : P1
17.10.18ThaumasiteCa3(SO4)[Si(OH)6](CO3) · 12H2OHex. 6 : P63
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
17.10.23MattheddleitePb5(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
17.10.28Wenkite(Ba,K)4(Ca,Na)6[(SO4)3|(Si,Al)20O39(OH)2] · 0.5H2OHex.
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.
  • 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.
  • 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  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2019, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: April 24, 2019 07:13:55 Page generated: March 27, 2019 11:49:23
Go to top of page