Mineralogy Database

Shannonite Mineral Data

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General Shannonite Information

Help on Chemical  Formula: Chemical Formula: Pb2OCO3
Help on Composition: Composition: Molecular Weight = 490.41 gm
   Lead    84.50 %  Pb   91.03 % PbO
   Carbon   2.45 %  C     8.97 % CO2
   Oxygen  13.05 %  O
          ______        ______ 
          100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb2O(CO3)
Help on Environment: Environment: In silicified breccia.
Help on IMA Status: IMA Status: Approved IMA 1993 (Dana # Added)
Help on Locality: Locality: Grand Reef mine, Graham County, Arizona, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For David M. Shannon (1942- ), a mineral dealer who helped collect the first samples of the mineral.
Help on Name Pronunciation: Name Pronunciation: Shannonite + Pronunciation Say SHANNONITE
Help on Synonym: Synonym: IMA1993-053

Shannonite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0326:1:0.5703
Help on Cell Dimensions: Cell Dimensions: a = 9.294, b = 9, c = 5.133, Z = 5; V = 429.35 Den(Calc)= 9.48
Help on Crystal System: Crystal System: Orthorhombic - Disphenoidal H-M Symbol (2 2 2)

Physical Properties of Shannonite

Help on Cleavage: Cleavage: None
Help on Color: Color: White.
Help on Density: Density: 9.31
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Porcelainous - Fine-grained, translucent massive material like broken china
Help on Hardness: Hardness: 3-3.5 - Calcite-Copper Penny
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Waxy
Help on Streak: Streak: white

Optical Properties of Shannonite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.504 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.513 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.0682,KPDmeas= 0.0695,KC= 0.14
Ncalc = 2.3 - 2.33
Help on Optical Data: Optical Data: Biaxial (+), a=1.642, b=1.645, g=1.654, bire=0.0120, 2V(Calc)=62, 2V(Meas)=52.

Calculated Properties of Shannonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=7.67 gm/cc
note: Specific Gravity of Shannonite =9.31 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.18
Boson Index = 0.82
Help on Photoelectric: Photoelectric: PEShannonite =1,574.65 barns/electron
U=PEShannonite x rElectron Density=12076.92 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Shannonite is Not Radioactive

Shannonite Classification

Help on  Dana Class: Dana Class: 16a.03.10.01 (16a)Carbonates - Hydroxyl or Halogen
  (16a.03)where (A B)2 (XO3) Zq
  (16a.03.10)Dana Group
16a.03.10.01 Shannonite! Pb2OCO3 2 2 2
Help on  Strunz Class: Strunz Class: 05.BE.05 05 - CARBONATES (NITRATES)
  05.B - Carbonates with additional anions, without H2O
  05.BE -With Pb, Bi
05.BE.05 Shannonite! Pb2OCO3 2 2 2

Other Shannonite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(MinRec) OPTIC PROP.(Am.Min.,Vol.81,1996)
Help on See Also: See Also: Links to other databases for Shannonite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Dana No: 16a.03.10.01 Strunz No: 05.BE.05





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