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Mattheddleite Mineral Data |
General Mattheddleite Information |
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Pb20(SiO4)7(SO4)4Cl4 | ||
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Molecular Weight = 5,314.65 gm | ||
Silicon 3.70 % Si 7.91 % SiO2 | |||
Lead 77.97 % Pb 83.99 % PbO | |||
Sulfur 2.41 % S 6.03 % SO3 | |||
Chlorine 2.67 % Cl 2.67 % Cl | |||
- % Cl -0.60 % -O=Cl2 | |||
Oxygen 13.25 % O | |||
______ ______ | |||
100.00 % 100.00 % = TOTAL OXIDE | |||
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Pb20(SiO4)7(SO4)4Cl4 | ||
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Lining cavities in quartz which contain other oxidized lead minerals. | ||
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Approved IMA 1987 | ||
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From Leadhills, Lanarkshire, Scotland. Link to MinDat.org Location Data. | ||
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Named for Matthew Forster Heddle (1828-1897), Scottish mineralogist. | ||
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Mattheddleite + Pronunciation ![]() |
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Mattheddleite Image | |||
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Mattheddleite Crystallography |
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a:c = 1:0.74917 | ||
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a = 9.963, c = 7.464, Z = 0.5; V = 641.63 Den(Calc)= 6.88 | ||
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Hexagonal - Dipyramidal H-M Symbol (6/m) Space Group: P 63/m | ||
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By Intensity(I/Io): 2.988(1), 4.13(0.4), 4.32(0.4), | ||
Physical Properties of Mattheddleite |
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{0001} Indistinct | ||
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Colorless, White. | ||
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Transparent to Translucent | ||
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Aggregates - Made of numerous individual crystals or clusters. | ||
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Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite) | ||
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Rosette - Bundled tabular aggregates resembling rose flower petals. | ||
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3.5-4.5 - Between Copper Penny and Fluorite-Apatite | ||
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Fluorescent, Short UV=dull yellow. | ||
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Adamantine | ||
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white | ||
Optical Properties of Mattheddleite |
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CI calc= 0.005 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1465,KC= 0.1473 Ncalc = 2.01 |
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Uniaxial (-), e=1.999, w=2.017, bire=0.0180. | ||
Calculated Properties of Mattheddleite |
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Bulk Density (Electron Density)=5.75 gm/cc note: Specific Gravity of Mattheddleite =6.88 gm/cc. |
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Fermion Index = 0.17 Boson Index = 0.83 |
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PEMattheddleite =1,432.01 barns/electron U=PEMattheddleite x rElectron Density=8,238.22 barns/cc. |
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GRapi = 0 (Gamma Ray American Petroleum Institute Units) Mattheddleite is Not Radioactive |
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Mattheddleite Classification |
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52.04.09.06 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O | ||
(52.04)with cations in [6] and/or > [6] coordination | |||
(52.04.09)Silicate apatites | |||
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09.AH.30 09 - SILICATES (Germanates) | ||
09.A - Nesosilicates | |||
09.AH -Nesosilicates with CO3, SO4, PO4, etc. | |||
Other Mattheddleite Information |
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NAME( AntBidBlaNic2) PHYS. PROP.(Am.Min.,Vol.73,p929,1988) OPTIC PROP.(Am.Min.,Vol.73,p929,1988) | ||
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Links to other databases for Mattheddleite : 1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - GeoScienceWorld 6 - Google Images 7 - Google Scholar 8 - Handbook of Mineralogy (MinSocAm) 9 - Handbook of Mineralogy (UofA) 10 - MinDAT 11 - Mineralienatlas (Deutsch) 12 - Online Mineral Museum 13 - QUT Mineral Atlas 14 - Ruff.Info Search for Mattheddleite using: Visit our Advertisers for Mattheddleite : Ask about Mattheddleite here : Print or Cut-and-Paste your Mattheddleite Specimen Label here :
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