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Leadhillite Mineral Data + |
General Leadhillite Information |
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| Pb4(SO4)(CO3)2(OH)2 | |||
| Molecular Weight = 1,078.90 gm | |||
| Hydrogen 0.19 % H 1.67 % H2O | |||
| Lead 76.82 % Pb 88.68 % PbO2 | |||
| Carbon 2.23 % C 8.16 % CO2 | |||
| Sulfur 2.97 % S 7.42 % SO3 | |||
| Oxygen 17.80 % O | |||
| ______ ______ | |||
| 100.00 % 105.93 % = TOTAL OXIDE | |||
| Pb4(SO4)(CO3)2(OH)2 | |||
| Secondary mineral. | |||
| Valid Species (Pre-IMA) 1832 | |||
| Leadhills, Lanarkshire, Scotland. Link to MinDat.org Location Data. | |||
| Named for the localiy. | |||
| ICSD 64807 | |||
| PDF 35-617 | |||
Leadhillite Image | |||
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Leadhillite Crystallography |
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| a:b:c =0.4373:1:0.5568 | |||
| a = 9.08, b = 20.76, c = 11.56, Z = 8; beta = 89.8° V = 2,179.06 Den(Calc)= 6.58 | |||
| Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a | |||
| By Intensity(I/Io): 3.53(1), 2.917(0.6), 2.605(0.5), | |||
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Physical Properties of Leadhillite |
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| [001] Perfect, [100] Indistinct | |||
| Colorless, Gray, Yellowish, White, Light blue. | |||
| 6.26 - 6.55, Average = 6.4 | |||
| Transparent to translucent | |||
| Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite). | |||
| Massive - Granular - Common texture observed in granite and other igneous rock. | |||
| Pseudo Hexagonal - Crystals show a hexagonal outline. | |||
| Tabular - Form dimensions are thin in one direction. | |||
| 2.5 - Finger Nail | |||
| None. | |||
| Adamantine | |||
| white | |||
Optical Properties of Leadhillite |
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| CI meas= -0.164 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= -0.133 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1463,KPDmeas= 0.1503,KC= 0.1291 |
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| Biaxial (-), a=1.87, b=2.0085, g=2.01, bire=0.1400, 2V(Calc)=10, 2V(Meas)=10. Dispersion relatively strong. | |||
Calculated Properties of Leadhillite |
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relectron=5.54 gm/cc |
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| Fermion Index = 0.17032 Boson Index = 0.82968 |
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PELeadhillite =1,401.45 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Leadhillite is Not Radioactive |
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Leadhillite Classification |
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| 17.1.2.1 (17)Compound Carbonates | |||
| (17.1)with miscellaneous formulae | |||
| (17.1.2)Dana Group | |||
| VI/B.13-50 VI - Sulfates,Chromates,Molybdates and Tungstates | |||
| VI/B - Waterfree sulfates [SO4]2- with unfamiliar anions. mostly big cations | |||
| VI/B.13 - Lanarkite - Susannite series | |||
Other Leadhillite Information |
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| NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32) | |||
| Links to other databases for Leadhillite : 1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 -Athena 4 - Crocoite.com Mineral Locations 5 - EUROmin Project 6 -Google Images 7 -Google Scholar 8 -Handbook of Mineralogy (UofA) 9 -MinDAT 10 -MinMax(Deutsch) 11 -MinMax(English) 12 -Mineralienatlas (Deutsch) 13 - Minerals of Wisconsin 14 -QUT Mineral Atlas 15 - WWW-MINCRYST 16 - YupRocks 17 -École des Mines de Paris Search for Leadhillite using: Visit our Advertisers for Leadhillite : Translate Leadhillite Mineral Data : Ask about Leadhillite here : Print or Cut-and-Paste your Leadhillite Specimen Label here :
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