General Paralaurionite Information
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Chemical Formula: |
PbCl(OH) |
Composition: |
Molecular Weight = 259.66 gm |
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Hydrogen 0.39 % H 3.47 % H2O |
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Lead 79.80 % Pb 85.96 % PbO |
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Chlorine 13.65 % Cl 13.65 % Cl |
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- % Cl -3.08 % -O=Cl2 |
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Oxygen 6.16 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
Empirical Formula: |
PbCl(OH) |
Environment: |
Secondary mineral from smelting activities. |
IMA Status: |
Valid Species (Pre-IMA) 1899 |
Locality: |
Ancient lead slags at Laurium, Greece. Link to MinDat.org Location Data. |
Name Origin: |
Named from its similarity to laurionite. |
Synonym: |
ICSD 74291 |
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PDF 16-158 |
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Rafaelite |
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Paralaurionite Image |
Images:
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Paralaurionite Crystallography
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Axial Ratios: |
a:b:c =2.711:1:1.8065 |
Cell Dimensions: |
a = 10.79, b = 3.98, c = 7.19, Z = 4; beta = 117.2° V = 274.62 Den(Calc)= 6.28 |
Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m |
X Ray Diffraction: |
By Intensity(I/Io): 3.21(1), 5.14(1), 2.51(0.9), |
Forms:
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Crystal Structure:
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Merlino S , Pasero M , Perchialli N , Mineralogical Magazine , 57 (1993) p.323-328, Crystal structure of paralaurionite and its OD relationships with laurionite
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Physical Properties of Paralaurionite
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Cleavage: |
[001] Distinct |
Color: |
Colorless, Violet, Green yellow, White. |
Density: |
6.05 |
Diaphaniety: |
Transparent |
Habit: |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
Hardness: |
3 - Calcite |
Luster: |
Subadamantine |
Streak: |
white |
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Optical Properties of Paralaurionite
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Gladstone-Dale: |
CI meas= -0.107 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= -0.066 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1805,KPDmeas= 0.1873,KC= 0.1693 |
Optical Data: |
Biaxial (-), a=2.05, b=2.15, g=2.2, bire=0.1500 |
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Calculated Properties of Paralaurionite
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Electron Density: |
relectron=5.22 gm/cc note: rParalaurionite =6.28 gm/cc. |
Fermion Index |
Fermion Index = 0.17638 Boson Index = 0.82362 |
Photoelectric: |
PEParalaurionite =1,473.61 barns/electron U=PEParalaurionite x relectron=7,698.21 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Paralaurionite is Not Radioactive |
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Paralaurionite Classification
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Dana Class: |
10.2.3.1 (10)Oxyhalides and Hydroxyhalides |
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(10.2)where A (O,OH) Xq |
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(10.2.3)Dana Group |
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10.2.3.1 Paralaurionite PbCl(OH) C 2/m 2/m |
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10.2.3.2 Belloite! Cu(OH)Cl P 21/a 2/m |
Strunz Class: |
III/D.10-20 III - Halogenides |
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III/D - Oxi-halogenides with Pb - Bi - Sb and related compounds |
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III/D.10 - Cotunnite - Matlockite series |
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III/D.10-10 Fiedlerite Pb3Cl4F(OH)2 P1 1 |
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III/D.10-20 Paralaurionite PbCl(OH) C 2/m 2/m |
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III/D.10-30 Laurionite PbCl(OH) Pnam 2/m 2/m 2/m |
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III/D.10-40 Cotunnite PbCl2 Pnam 2/m 2/m 2/m |
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III/D.10-50 Pseudocotunnite K2PbCl4(?) P nma 2/m 2/m 2/m |
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III/D.10-60 Matlockite PbFCl P 4/nmm 4/m 2/m 2/m |
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III/D.10-65 Rorisite (Ca,Mg)FCl P 4/nmm 4/m 2/m 2/m |
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III/D.10-70 Zavaritskite BiOF P 4/nmm 4/m 2/m 2/m |
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III/D.10-80 Bismoclite BiOCl P 4/nmm 4/m 2/m 2/m |
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III/D.10-90 Daubreeite BiO(OH,Cl) P 4/nmm 4/m 2/m 2/m |
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III/D.10-140 Symesite! Pb10(SO4)O7Cl4·(H2O) B1 1 |
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Other Paralaurionite Information
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References: |
NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
See Also: |
Links to other databases for Paralaurionite :
1 -Am. Min. Crystal Structure Database
2 -Athena
3 - Crocoite.com Mineral Locations
4 - EUROmin Project
5 - Glendale Community College
6 -Google Images
7 -Google Scholar
8 -Handbook of Mineralogy (UofA)
9 -MinDAT
10 -MinMax(Deutsch)
11 -MinMax(English)
12 -Mineralienatlas (Deutsch)
13 -QUT Mineral Atlas
14 -École des Mines de Paris
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Print or Cut-and-Paste your Paralaurionite Specimen Label here :
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Paralaurionite
PbCl(OH)
Dana No: 10.2.3.1 Strunz No: III/D.10-20
Locality:
Notes:
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