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Pseudocotunnite Mineral Data + |
General Pseudocotunnite Information |
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| K2PbCl4 (?) | |||
| Molecular Weight = 427.21 gm | |||
| Potassium 18.30 % K 22.05 % K2O | |||
| Lead 48.50 % Pb 52.25 % PbO | |||
| Chlorine 33.19 % Cl 33.19 % Cl | |||
| - % Cl -7.49 % -O=Cl2 | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| K2PbCl4 | |||
| In fumaroles, associated with cotunnite. | |||
| Valid Species (Pre-IMA) 1873 | |||
| Vesuvius, Italy. Link to MinDat.org Location Data. | |||
| Named for the Greek "pseudo", false and cotunnite, a mineral it resembles in some respects. | |||
Pseudocotunnite Image | |||
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Pseudocotunnite Crystallography |
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| a:b:c =0.8322:1:0.4889 | |||
| a = 9.82, b = 11.8, c = 5.77, Z = 4; V = 668.60 Den(Calc)= 4.24 | |||
| Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P nma | |||
Physical Properties of Pseudocotunnite |
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| Colorless, Green yellow, Yellow, White. | |||
| 4.25 | |||
| Transparent to Translucent | |||
| Acicular - Occurs as needle-like crystals. | |||
| Aggregates - Made of numerous individual crystals or clusters. | |||
| Platy - Sheet forms (e.g. micas). | |||
| Earthy (Dull) | |||
| white | |||
Optical Properties of Pseudocotunnite |
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| CI meas= -0.081 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= -0.084 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2358,KPDmeas= 0.2353,KC= 0.2176 |
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| Biaxial (?), b=2 | |||
Calculated Properties of Pseudocotunnite |
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relectron=3.74 gm/cc |
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| Fermion Index = 0.1072 Boson Index = 0.8928 |
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PEPseudocotunnite = 850.37 barns/electron |
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| GRapi = 232.44 (Gamma Ray American Petroleum Institute Units) Estimated Radioactivity from Pseudocotunnite |
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Pseudocotunnite Classification |
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| 11.2.1.1 (11)Halide Complexes; Alumino-fluorides | |||
| (11.2)where (A)m B (X)4 | |||
| (11.2.1)Dana Group | |||
| III/D.10-50 III - Halogenides | |||
| III/D - Oxi-halogenides with Pb - Bi - Sb and related compounds | |||
| III/D.10 - Cotunnite - Matlockite series | |||
Other Pseudocotunnite Information |
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| NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8) | |||
| Links to other databases for Pseudocotunnite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris Search for Pseudocotunnite using: Visit our Advertisers for Pseudocotunnite : AA Mineral SpecimensB & L Fine Minerals Crystal Vaults Dan Weinrich Fine Minerals Dan Weinrich Auctions e-Rocks Auctions Excalibur Minerals Exceptional Minerals Fabre Minerals Greenside Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club MineralsWeb Fine Minerals Rockshop.cz T G Fine Minerals Wrights Rock Shop Translate Pseudocotunnite Mineral Data : Ask about Pseudocotunnite here : Print or Cut-and-Paste your Pseudocotunnite Specimen Label here :
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