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About ShannoniteHide

David Shannon
3 - 3½
Crystal System:
Named in honor of David Shannon (18 December 1942, Moline, Illinois, USA - 2 January 2004, Mesa, Arizona, USA), prolific Arizona mineral collector and dealer. He helped collect the first specimens of the mineral.
A lead oxycarbonate that can form naturally under highly oxidising conditions, but also from heating cerussite (e.g., during fire-setting methods used in ore extraction underground; during mine fires).

Classification of ShannoniteHide


B : Carbonates with additional anions, without H2O
E : With Pb, Bi

Physical Properties of ShannoniteHide

3 - 3½ on Mohs scale

Optical Data of ShannoniteHide

Biaxial (+)
RI values:
nα = 1.642 nβ = 1.645 nγ = 1.654
Measured: 52° , Calculated: 62°
Max Birefringence:
δ = 0.012
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
relatively weak

Chemical Properties of ShannoniteHide

IMA Formula:

Crystallography of ShannoniteHide

Crystal System:
Cell Parameters:
a = 9.29 Å, b = 9 Å, c = 5.13 Å
a:b:c = 1.032 : 1 : 0.57
Unit Cell V:
428.92 ų (Calculated from Unit Cell)

Type Occurrence of ShannoniteHide

Synonyms of ShannoniteHide

Other Language Names for ShannoniteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Minium2 photos of Shannonite associated with Minium on mindat.org.
Litharge1 photo of Shannonite associated with Litharge on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

5.BE.XAbellaiteNaPb2(CO3)2(OH)Hex. 6mm : P63mc
5.BE.15PlumbonacritePb5O(OH)2(CO3)3Trig. 3m (3 2/m) : P3c1
5.BE.20PhosgenitePb2CO3Cl2Tet. 4/mmm (4/m 2/m 2/m) : P4/mbm
5.BE.25Bismutite(BiO)2CO3Orth. mm2 : Imm2
5.BE.30KettneriteCaBiCO3OFOrth. mmm (2/m 2/m 2/m)
5.BE.35BeyeriteCa(BiO)2(CO3)2Orth. mmm (2/m 2/m 2/m) : Immm

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for ShannoniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Roberts, A. C., Stirling, J. A. R., Carpenter, G. J. C., Criddle, A. J., Jones, G. C., Birkett, T. C. & Birch, W. D. (1995) Shannonite, Pb2OCO3, a new mineral from the Grand Reef mine, Graham County, Arizona, USA. Mineralogical Magazine: 59: 305-310.
Jambor, J.L., Pertsev, N.N., Roberts, A.C. (1996) New mineral names. American Mineralogist: 81: 249-254.
Krivovichev, S.V., Burns, P.C. (2000) Crystal chemistry of basic lead carbonates. I. Crystal structure of synthetic shannonite, Pb2O(CO3). Mineralogical Magazine: 64: 1063-1068.

Internet Links for ShannoniteHide

Localities for ShannoniteHide

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.
  • New South Wales
    • Yancowinna Co.
      • Broken Hill district
        • Broken Hill
          • Broken Hill South Mine (BHS Mine; South Mine)
Australian Min. 3:1 (1997)
  • Grand Est
    • Haut-Rhin
      • Ste Marie-aux-Mines (Markirch)
U. Kolitsch (1997): New mineral occurrences from some localities in the Vosges, France: Triembach, Bluttenberg and Val d'Ajol. Aufschluss 48 (2), 65-91. (in German)
  • Baden-Württemberg
    • Black Forest
      • Badenweiler
        • Badenweiler Pb mining district
          • Sehringen
Schlomann, C. and Steen, H. (1990) Neue Mineralfunde aus dem Bergbaugebiet von Badenweiler im Südschwarzwald. Lapis, 15 (12), 13-20; 50. (in German)
  • Attica
    • East Attica
      • Lavreotiki
[MinMax website]; Kolitsch, U., Rieck, B., Brandstätter, F., Schreiber, F., Fabritz, K. H., Blaß, G. & Gröbner, J. (2014): Neufunde aus dem altem Bergbau und den Schlacken von Lavrion (I). Mineralien-Welt 25 (1), 60-75 (in German). [identification announced; no description given yet]
          • Agios Konstantinos [St Constantine] (Kamariza)
LAPIS 24 (7/8) 1999; Wendel, W. and Markl, G. (1999) Lavrion: Mineralogische Klassiker und Raritäten für Sammler. LAPIS 24 (7/8):34-52
          • Sounion Area
            • Agia Varvara Mines (St Barbara Mines)
Rieck, B., Kolitsch, U., Voudouris, P., Giester, G. and Tzeferis, P. (2018): Weitere Neufunde aus Lavrion, Griechenland. Mineralien-Welt 29 (5), 32-77 (in German).
  • Arizona
    • Graham Co.
      • Aravaipa District
        • Santa Teresa Mts
          • Klondyke
            • Grand Reef Mountain
              • Laurel Canyon
Roberts, A.C., J.A.R. Stirling, G.J.C. Carpenter, A.J. Criddle, G.C. Jones, T.C. Birkett, and W.D. Birch (1995) Shannonite, Pb2OCO3, a new mineral from the Grand Reef Mine, Graham County, Arizona, USA. Mineralogical Magazine: 59: 304-310.
    • Maricopa Co.
      • Big Horn Mts
        • Osborn District
          • Tonopah
            • Belmont Mountain
Grant, Raymond W., Richard A. Bideaux & Sidney A. Williams (2006), Minerals Added to the Arizona List 1995 to 2005: 8.
    • Pinal Co.
      • Superior District
        • Superior
          • Picketpost Mountain area
Grant, Raymond W., Richard A. Bideaux & Sidney A. Williams (2006), Minerals Added to the Arizona List 1995 to 2005: 8.
Mineral and/or Locality  
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