Shannonite (original) (raw)

A valid IMA mineral species

About ShannoniteHide

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Specific Gravity:

7.46 (Calculated)

Crystal System:

Orthorhombic

Name:

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).

Chemically related to grootfonteinite and UM1995-03-CO:Pb.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:3632:6

188b83ff-89dd-41e5-a39b-e7ba214fcd6f

IMA Classification of ShannoniteHide

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Type description reference:

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 (395) 305-310 doi:10.1180/minmag.1995.059.395.14

Classification of ShannoniteHide

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5.BE.05

5 : CARBONATES (NITRATES)
B : Carbonates with additional anions, without H2O
E : With Pb, Bi

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Physical Properties of ShannoniteHide

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Fracture:

Irregular/Uneven

Density:

7.46(15) g/cm3 (Calculated)

Optical Data of ShannoniteHide

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RI values:

_n_α = 1.642 _n_β = 1.645 _n_γ = 1.654

2V:

Measured: 52° , Calculated: 62°

δ = 0.012

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Dispersion:

relatively weak

Colour in reflected light:

white

Chemistry of ShannoniteHide

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Crystallography of ShannoniteHide

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Crystal System:

Orthorhombic

Class (H-M):

222 - Disphenoidal

Cell Parameters:

a = 9.014(1) Å, b = 9.315(1) Å, c = 5.1465(7) Å

Ratio:

a:b:c = 0.968 : 1 : 0.552

Unit Cell V:

432.13 ų (Calculated from Unit Cell)

Crystal StructureHide

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ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0014550	Shannonite	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		2000	synthetic	0	293

CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Type Occurrence of ShannoniteHide

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Place of Conservation of Type Material:

Canadian Geological Survey, Ottawa, Canada, 67216; The Natural History Museum, London, England, 1993,487.

Associated Minerals at Type Locality:

Reference:

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.

Synonyms of ShannoniteHide

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Other Language Names for ShannoniteHide

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Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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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 ShannoniteHide

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References for ShannoniteHide

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Reference List:

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 (395) 305-310 doi:10.1180/minmag.1995.059.395.14

Localities for ShannoniteHide

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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

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- 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.