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Roeblingite

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Formula:
Pb
 
2
Ca
 
6
Mn
2+
 
(Si
 
3
O
 
9
)
 
2
(SO
 
4
)
 
2
(OH)
 
2
· 4H
 
2
O
System:MonoclinicColour:White, greyish white
Hardness:3
Name:
Named in 1897 by Samuel Lewis Penfield and Harry Ward Foote in honor of Colonel Washington A. Roebling (1837 – 1926), 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 Roeblingite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:8/E.02-30
Nickel-Strunz 10th (pending) edition ID:9.CB.05

9 : SILICATES (Germanates)
C : Cyclosilicates
B : [Si3O9]6- 3-membered single rings, with insular complex anions
Dana 8th edition ID: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
Hey's CIM Ref.:17.10.25

17 : Silicates Containing other Anions
10 : Silicates with sulphate, molybdate or tungstate
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Type Occurrence of Roeblingite

Type Locality:Parker Mine (Parker shaft), Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA
General Appearance of Type Material:Porcelanous
Year of Discovery:1897
Geological Setting of type material:highly altered (metasomatized) zone in a zinc-manganese-iron silicate-oxide orebody
Associated Minerals at type locality:
WillemiteGanophylliteEpidote-(Pb)ClinohedriteBaryte
Andradite

Occurrences of Roeblingite

Geological Setting:Metamorphosed manganese deposits.

Physical Properties of Roeblingite

Lustre:Dull
Diaphaneity (Transparency):Transparent, Opaque
Colour:White, greyish white
Streak:White
Hardness (Mohs):3
Cleavage:Perfect
on {001}
Density (measured):3.433 g/cm3
Density (calculated):3.44 g/cm3

Crystallography of Roeblingite

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

Optical Data of Roeblingite

Type:Biaxial (+)
RI values: nα = 1.640 nβ = 1.640 nγ = 1.660
2V:Measured: 61° (2), Calculated: 61°
Maximum Birefringence:δ = 0.020

Chart 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 Roeblingite

Formula:
Pb
 
2
Ca
 
6
Mn
2+
 
(Si
 
3
O
 
9
)
 
2
(SO
 
4
)
 
2
(OH)
 
2
· 4H
 
2
O
Simplified for copy/paste:Pb2Ca6Mn2+(Si3O9)2(SO4)2(OH)2·4H2O
Essential elements:Ca, H, Mn, O, Pb, S, Si
All elements listed in formula:Ca, H, Mn, O, Pb, S, Si
Common Impurities:Sr,Na,K,C

Relationship of Roeblingite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.CB.10Diversilite-(Ce)
Na
 
2
(Ba,K)
 
6
Fe
2+
 
Ce
 
2
Ti
 
3
(Si
 
3
O
 
9
)
 
3
(HSiO
 
4
)
 
3
(OH,H
 
2
O)
 
9
9.CB.15Ilímaussite-(Ce)
(Na,K)
 
7-8
(Ba,K)
 
10
Ce
 
5
(Nb,Ti)
 
6
(Si
 
3
O
 
9
)
 
4
(Si
 
9
O
 
18
)O
 
6
(O,OH)
 
24
Related Minerals - Hey's Index Grouping:

- +
17.10.1Nosean
Na
 
8
(Al
 
6
Si
 
6
O
 
24
)(SO
 
4
) · H
 
2
O
17.10.2Pitiglianoite
Na
 
6
K
 
2
(Al
 
6
Si
 
6
O
 
24
)(SO
 
4
) · 2H
 
2
O
17.10.3Vishnevite
(Na,K)
 
8
(Al
 
6
Si
 
6
O
 
24
)(SO
 
4
,CO
 
3
) · 2H
 
2
O
17.10.4Haüyne
(Na,Ca)
 
4-8
(Al
 
6
Si
 
6
O
 
24
)(SO
 
4
,S,Cl)
 
1-2
17.10.5Liottite
(Na,K)
 
16
Ca
 
8
(Al
 
6
Si
 
6
O
 
24
)
 
3
(SO
 
4
)
 
5
Cl
 
4
17.10.6Latiumite
(Ca,K)
 
4
(Si,Al)
 
5
O
 
11
(SO
 
4
,CO
 
3
)
17.10.7Tuscanite
(K(Ca,Na)
 
6
(Si,Al)
 
10
O
 
22
[SO
 
4
,CO
 
3
,(OH)
 
2
] · H
 
2
O
17.10.8Microsommite
Na
 
4
K
 
2
Ca
 
2
(Al
 
6
Si
 
6
O
 
24
)(SO
 
4
)Cl
 
2
17.10.9Delhayelite
(Na,K)
 
10
Ca
 
5
Al
 
6
Si
 
32
O
 
80
(Cl
 
2
,F
 
2
,SO
 
4
)
 
3
· 18H
 
2
O
17.10.10Hydrodelhayelite
KCa
 
2
AlSi
 
7
O
 
17
(OH)
 
2
· 6H
 
2
O
17.10.11Davyne
(Na,K)
 
6
Ca
 
2
(Al
 
6
Si
 
6
O
 
24
)(Cl
 
2
,SO
 
4
)
 
2
17.10.12Afghanite
(Na,Ca,K)
 
8
(Al
 
6
Si
 
6
O
 
24
)(Cl
 
2
,SO
 
4
,CO
 
3
)
 
3
· 0.5H
 
2
O
17.10.13Franzinite
(Na,K)
 
6
Ca
 
2
(Al
 
6
Si
 
6
O
 
24
)(SO
 
4
)
 
2
· 0.5H
 
2
O
17.10.14Giuseppettite
(Na,K,Ca)
 
7-8
(Al
 
6
Si
 
6
O
 
24
)(SO
 
4
,Cl)
 
1-2
17.10.15Sacrofanite
(Na,K)
 
98
Ca
 
20
(Al
 
6
Si
 
6
O
 
24
)
 
14
(SO
 
4
)
 
26
Cl
 
2
· 8H
 
2
O
17.10.16Chessexite
(Na,K)
 
4
Ca
 
2
(Mg,Zn)
 
3
Al
 
8
(SO
 
4
)
 
10
(SiO
 
4
)
 
2
· 40H
 
2
O
17.10.17Innelite
Na
 
2
CaBa
 
4
Ti
 
3
(Si
 
2
O
 
7
)
 
2
(SO
 
4
)
 
2
O
 
4
17.10.18Thaumasite
Ca
 
3
(SO
 
4
)[Si(OH)
 
6
](CO
 
3
) · 12H
 
2
O
17.10.19Ellestadite
17.10.20Ellestadite-(Cl)
Ca
 
10
(SiO
 
4
)
 
3
(SO
 
4
)
 
3
Cl
 
2
17.10.21Hydroxylellestadite
Ca
 
5
(SiO
 
4
)
 
1.5
(SO
 
4
)
 
1.5
(OH)
17.10.22Fluorellestadite
Ca
 
5
(SiO
 
4
)
 
1.5
(SO
 
4
)
 
1.5
F
17.10.23Mattheddleite
Pb
 
5
(SiO
 
4
)
 
1.5
(SO
 
4
)
 
1.5
(Cl,OH)
17.10.24Queitite
Pb
 
4
Zn
 
2
(SO
 
4
)(SiO
 
4
)(Si
 
2
O
 
7
)
17.10.26Yoshimuraite
Ba
 
2
Mn
 
2
Ti(Si
 
2
O
 
7
)(PO
 
4
)O(OH)
17.10.27Kegelite
Pb
 
8
Al
 
4
(Si
 
8
O
 
20
)(SO
 
4
)
 
2
(CO
 
3
)
 
4
(OH)
 
8
17.10.28Wenkite
(Ba,K)
 
4
(Ca,Na)
 
6
[(SO
 
4
)
 
3
|(Si,Al)
 
20
O
 
39
(OH)
 
2
] · 0.5H
 
2
O
17.10.29Macquartite
Cu
 
2
Pb
 
7
(CrO
 
4
)
 
4
(SiO
 
4
)
 
2
(OH)
 
2
17.10.30Welinite
Mn
2+
6
(W
6+
 
,Mg)
 
2
(SiO
 
4
)
 
2
(O,OH)
 
6

Other Names for Roeblingite

Other Languages:
German:Roeblingit
Russian:Реблингит
Simplified Chinese:硫硅钙铅矿
硫矽钙铅矿
Spanish:Roeblingita

Other Information

Fluorescence in UV light:Dull red (SW UV)
Health Warning:Contains Pb

References for Roeblingite

Reference List:

- +
American Mineralogist (1931): 16: 455.

Palache, C. (1935), USGS PP 180: 113.

Hurlbut, C.S., Jr. & Baum, J.L. (1960): American Mineralogist: 45: 1137-1143.

American Mineralogist (1966): 51: 504-508.

Dunn, P.J. (1983): 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.

Braithwaite, R. S. W. (1985): Roeblingite: a revised formula from infra-red and thermal analysis data. Mineralogical Magazine, 49, 756-758.

Dunn, Pete J. (1995): Franklin and Sterling Hill New Jersey: the world's most magnificent mineral deposits, part 4: 503.

Internet Links for Roeblingite

Search Engines:
  • Look for Roeblingite on Google
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  • External Links:
  • Look for Roeblingite on Webmineral
  • Look for Roeblingite on Athena Mineralogy
  • Look for Roeblingite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Roeblingite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
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  • Localities for Roeblingite

    The 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.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    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.
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