Mineralogy Database

Lorettoite Mineral Data

Search Webmineral :

General Lorettoite Information

Help on Chemical  Formula: Chemical Formula: Pb7O6Cl2
Help on Composition: Composition: Molecular Weight = 1,617.30 gm
   Lead      89.68 %  Pb   96.61 % PbO
   Chlorine   4.38 %  Cl    4.38 % Cl
               -   %   Cl   -0.99 % -O=Cl2   
   Oxygen     5.94 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb7O6Cl2
Help on Environment: Environment: Oxidized lead ores associated with ancient lead slags. Shown to be a man made equivalent of cubutite at the type locality.
Help on IMA Status: IMA Status: Discredited IMA 1979
Help on Locality: Locality: Loretto, Tennessee, USA. Laurium, Greece. Chubut, Argentina. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named in 1916 for its original locality.

Lorettoite Image

Click Here for Larger   Image in a New Browser Window Images:
Click Here for Larger   Image


Comments: Orange crystalline lorettoite in matrix.
Location: Kombat Mine, Kombat, Otjozondjuba, Namibia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Lorettoite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.2397:1:0.2401
Help on Cell Dimensions: Cell Dimensions: a = 5.49, b = 22.9, c = 5.5, Z = 2; V = 691.47 Den(Calc)= 7.77
Help on Crystal System: Crystal System: Orthorhombic Space Group: pseudo-TET
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.98(1), 2.77(0.8), 1.642(0.7),1.993(0.7), 2.25(0.6), 2.31(0.6), 3.49(0.6), 3.86(0.6),

Physical Properties of Lorettoite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Honey yellow, Reddish yellow.
Help on Density: Density: 7.6 - 7.77, Average = 7.68
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 3 - Calcite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Adamantine
Help on Magnetism: Magnetism: Nonmagnetic

Optical Properties of Lorettoite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.248 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.234 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1757,KPDmeas= 0.1776,KC= 0.1423
Ncalc = 2.08 - 2.11
Help on Optical Data: Optical Data: Uniaxial (-), e=2.33, w=2.4, bire=0.0700.

Calculated Properties of Lorettoite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.30 gm/cc
note: Specific Gravity of Lorettoite =7.77 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.19
Boson Index = 0.81
Help on Photoelectric: Photoelectric: PELorettoite =1,697.37 barns/electron
U=PELorettoite x rElectron Density=10698.90 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lorettoite is Not Radioactive

Lorettoite Classification

Help on  Dana Class: Dana Class: (10)Oxyhalides and Hydroxyhalides
  (10.05)where Am (O,OH)p Xq
  (10.05.12)Dana Group Lorettoite? Pb7O6Cl2 pseudo-TET Ortho
Help on  Strunz Class: Strunz Class: 03.XX.00 03 - Halogenides
  03.X - Unclassified Strunz Halogenides
  03.XX -Oxyhalide
03.XX.00 Hydrophilite? CaCl2 Pnnm 2/m 2/m 2/m
03.XX.00 Hydromolysite? FeCl3•6(H2O) C 2/m 2/m
03.XX.00 Lorettoite? Pb7O6Cl2 pseudo-TET Ortho
03.XX.00 Yttrocerite* CaF2(Y,Ce)F3 Unk Cubic
03.XX.00 IMA2009-014 SrF2 F m3m 4/m 3 2/m
03.XX.00 IMA2009-015 NaSrCeF6 P 63/m 6/m

Other Lorettoite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana) OPTIC PROP.(Dana)
Help on See Also: See Also: Links to other databases for Lorettoite :
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 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

Search for Lorettoite using:

Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Lorettoite :

Ask about Lorettoite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espaņol

Print or Cut-and-Paste your Lorettoite Specimen Label here :


Dana No: Strunz No: 03.XX.00





Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.