Mineralogy Database

Heliophyllite Mineral Data

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General Heliophyllite Information

Help on Chemical  Formula: Chemical Formula: Pb6As2O7Cl4
Help on Composition: Composition: Molecular Weight = 1,646.85 gm
   Arsenic    9.10 %  As   12.98 % AsO2
   Lead      75.49 %  Pb   81.32 % PbO
   Chlorine   8.61 %  Cl    8.61 % Cl
               -   %   Cl   -1.94 % -O=Cl2   
   Oxygen     6.80 %  O
            ______        ______ 
            100.00 %      100.97 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb6As2O7Cl4
Help on Environment: Environment: Secondary mineral.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1888
Help on Locality: Locality: Langban, Harstig, and Jakobsverg mines, Varmland Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from the Greek for "sun" and "leaf', in reference to its color and structure.
Help on Name Pronunciation: Name Pronunciation: Heliophyllite + Pronunciation Say HELIOPHYLLITE
 

Heliophyllite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0037:1:2.3722
Help on Cell Dimensions: Cell Dimensions: a = 10.823, b = 10.783, c = 25.58, Z = 8; V = 2,985.30 Den(Calc)= 7.33
Help on Crystal System: Crystal System: Orthorhombic Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.84(1), 2.7(0.4), 3.66(0.35),
 

Physical Properties of Heliophyllite

Help on Cleavage: Cleavage: {011} Good
Help on Color: Color: Greenish yellow, Yellow.
Help on Density: Density: 6.89
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Vitreous - Greasy
Help on Streak: Streak: light yellow
 

Optical Properties of Heliophyllite

Help on Optical Data: Optical Data: Biaxial (-), 2V(Meas)=large. Dispersion r > v strong.
  NCalc= 1.99 - from Gladstone-Dale relationship (KC = 0.1354) where Ncalc=Dcalc*KC+1
NCalc= 1.93 - from Gladstone-Dale relationship (KC = 0.1354) where Ncalc=Dmeas*KC+1
 

Calculated Properties of Heliophyllite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.07 gm/cc
note: Specific Gravity of Heliophyllite =7.33 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.16
Boson Index = 0.84
Help on Photoelectric: Photoelectric: PEHeliophyllite =1,406.90 barns/electron
U=PEHeliophyllite x rElectron Density=8,541.36 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Heliophyllite is Not Radioactive
 

Heliophyllite Classification

Help on  Dana Class: Dana Class: 46.02.02.01 (46)Basic or Halogen-Containing Antimonites, Arsenites and Phosphites
  (46.02)with miscellaneous formulae
  (46.02.02)Dana Group
 
46.02.02.01 Heliophyllite Pb6As2O7Cl4 Unk Ortho
Help on  Strunz Class: Strunz Class: 03.DC.65 03 - HALIDES
  03.D - Oxyhalides, Hydroxyhalides and Related Double Halides
  03.DC -With Pb (As,Sb,Bi), without Cu
 
03.DC.65 Ecdemite Pb6As2O7Cl4 Unk Tetra
 
03.DC.65 Heliophyllite Pb6As2O7Cl4 Unk Ortho
 

Other Heliophyllite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Heliophyllite :
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

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

Heliophyllite

Pb6As2O7Cl4
Dana No: 46.02.02.01 Strunz No: 03.DC.65
Locality:

 

Notes:

 

 
   
 


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