General Mereheadite Information![]() Pb2O(OH)Cl |
![]() Molecular Weight = 482.86 gm |
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Hydrogen 0.21 % H 1.87 % H2O |
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Lead 85.82 % Pb 92.45 % PbO |
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Chlorine 7.34 % Cl 7.34 % Cl |
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- %
Cl -1.66 % -O=Cl2 |
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Oxygen 6.63 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
![]() Pb2O(OH)Cl |
![]() In lenses and cavities in veins of manganese and iron minerals which cut dolomitic limestones. Related to litharge. |
![]() Approved IMA 1998 (Dana # Added) |
![]() Merehead Quarry, Cranmore, Somerset, England, U.K. Link to MinDat.org Location Data. |
![]() Named after its locality. |
![]() Mereheadite + Pronunciation |
![]() ![]() IMA1996-045 |
| | Mereheadite Image
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Mereheadite Crystallography![]() a:b:c =1.0206:1:2.3617 |
![]() a = 5.68, b = 5.565, c = 13.143, Z = 4; beta = 90.64° V = 415.41 Den(Calc)= 7.72 |
![]() Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c |
![]() By Intensity(I/Io): 2.93(1), 3.785(0.5), 2.825(0.4), |
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| Physical Properties of Mereheadite![]() {001} Perfect |
![]() Pale yellow, Reddish orange. |
![]() 7.12 - 7.69, Average = 7.4 |
![]() Translucent |
![]() Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments. |
![]() Granular - Generally occurs as anhedral to subhedral crystals in matrix. |
![]() 3.5 - Copper Penny |
![]() Vitreous - Resinous |
![]() white |
| Optical Properties of Mereheadite![]() CI meas= -0.094 (Poor) - where the CI = (1-KPDmeas/KC) |
CI calc= -0.049 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.16,KPDmeas= 0.1668,KC= 0.1525 Ncalc = 2.09 - 2.18 ![]() Biaxial (?), a=2.19, g=2.28, bire=0.0900 |
| Calculated Properties of Mereheadite![]() Bulk Density (Electron Density)=6.33 gm/cc |
note: Specific Gravity of Mereheadite =7.72 gm/cc. ![]() Fermion Index = 0.18 |
Boson Index = 0.82 ![]() PEMereheadite =1,606.99 barns/electron |
U=PEMereheadite x rElectron Density=10174.34 barns/cc. ![]() GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Mereheadite is Not Radioactive | Mereheadite Classification![]() 10.04.05.01 (10)Oxyhalides and Hydroxyhalides |
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(10.04)where (A)2 (O,OH) Xq |
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(10.04.05)Dana Group |
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![]() 03.DC.45 03 - HALIDES |
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03.D - Oxyhalides, Hydroxyhalides and Related Double Halides |
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03.DC -With Pb (As,Sb,Bi), without Cu |
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| Other Mereheadite Information![]() NAME( MinRec) PHYS. PROP.(Min.Mag.,Vol.63,p387-393,1998) OPTIC PROP.(Min.Mag.,Vol.63,p387-393,1998) |
![]() Links to other databases for Mereheadite : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - GeoScienceWorld 4 - Google Images 5 - Google Scholar 6 - Handbook of Mineralogy (MinSocAm) 7 - Handbook of Mineralogy (UofA) 8 - MinDAT 9 - Mineralienatlas (Deutsch) 10 - Online Mineral Museum 11 - QUT Mineral Atlas 12 - Ruff.Info Search for Mereheadite using: Visit our Advertisers for Mereheadite : A Bijoux Google Search for MereheaditeAdam's Minerals Google Search for Mereheadite Cape Minerals Google Search for Mereheadite Dakota Matrix Minerals Google Search for Mereheadite Excalibur Mineral Corp. Google Search for Mereheadite Exceptional Minerals Google Search for Mereheadite John Betts Fine Minerals Search for Mereheadite McDougall Minerals Google Search for Mereheadite Mineral News Website Link Rock and Mineral Shows Google Search for Mereheadite Weinrich Minerals, Inc. Google Search for Mereheadite Ask about Mereheadite here : Print or Cut-and-Paste your Mereheadite Specimen Label here :
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