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Lazurite Mineral Data

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General Lazurite Information

Help on Chemical  Formula: Chemical Formula: Na3Ca(Al3Si3O12)S
Help on Composition: Composition: Molecular Weight = 498.31 gm
   Sodium    13.84 %  Na   18.66 % Na2O
   Calcium    8.04 %  Ca   11.25 % CaO
   Aluminum  16.24 %  Al   30.69 % Al2O3
   Silicon   16.91 %  Si   36.17 % SiO2
   Sulfur     6.43 %  S     6.43 % S2-
               -   %  S    -3.21 % -O=S 
   Oxygen    38.53 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na3CaAl3Si3O12S
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1890
Help on Locality: Locality: District of Badakhshan, Afghanistan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Persian lazward - "blue."
Help on Name Pronunciation: Name Pronunciation: Lazurite Say LAZURITE
Help on Synonym: Synonym: Lapis lazuli
  Lasurite
  Sapphiros of Pliny
  Ultamarine pigment
 

Lazurite Image

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  Lazurite

Comments: A single, deep blue, dodecahedron of Lazurite measuring 1 cm on a white marble matrix.
Location: Firgamu, Badakhashan Province, Afghanistan. Scale: 1.2 x 1 x 0.9 cm.
© Isaias Casanova / IC Minerals

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  Phlogopite   Lazurite

Comments: Gemmy brownish phlogopite crystals on blue lazurite (lapis) matrix with minor pyrite.
Location: Koksha Valley, Badakhshan Province, Afghanistan. Scale: 10 x 11.5 cm.
© Kevin Ward

Lazurite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 9.105, Z = 2; V = 754.81 Den(Calc)= 2.19
Help on Crystal System: Crystal System: Isometric - Hextetrahedral H-M Symbol (4 3m) Space Group: P 43n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.71(1), 2.62(0.8), 2.87(0.45),
 

Physical Properties of Lazurite

Help on Cleavage: Cleavage: {110} Imperfect
Help on Color: Color: Blue, Azure blue, Violet blue, Greenish blue.
Help on Density: Density: 2.38 - 2.42, Average = 2.4
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luminescence: Luminescence: Non-Fluorescent.
Help on Luster: Luster: Vitreous - Dull
Help on Streak: Streak: light blue
 

Optical Properties of Lazurite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.076 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.179 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2333,KPDmeas= 0.2129,KC= 0.1979
Ncalc = 1.43 - 1.48
Help on Optical Data: Optical Data: Isotropic, n=1.5-1.522.
 

Calculated Properties of Lazurite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.37 gm/cc
note: Specific Gravity of Lazurite =2.40 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0086724318
Boson Index = 0.9913275682
Help on Photoelectric: Photoelectric: PELazurite = 2.67 barns/electron
U=PELazurite x rElectron Density= 6.33 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lazurite is Not Radioactive
 

Lazurite Classification

Help on  Dana Class: Dana Class: 76.02.03.04 (76)Tectosilicate Al-Si Framework
  (76.02)Feldspathoids and related species
  (76.02.03)Sodalite group
 
76.02.03.01 Sodalite Na8Al6Si6O24Cl2 P 43n 4 3m
 
76.02.03.02 Nosean Na8Al6Si6O24(SO4) P 43m 4 3m
 
76.02.03.03 Hauyne (Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2 P 43n 4 3m
 
76.02.03.04 Lazurite Na3Ca(Al3Si3O12)S P 43n 4 3m
 
76.02.03.05 Bicchulite Ca2Al2SiO6(OH)2 I 43m 4 3m
 
76.02.03.06 Kamaishilite Ca2Al2SiO6(OH)2 I-lattice Tetra
 
76.02.03.07 Tugtupite Na4AlBeSi4O12Cl I 4 4
 
76.02.03.08 Tsaregorodtsevite N(CH3)4AlSi5O12 I 222 2 2 2
Help on  Strunz Class: Strunz Class: 09.FB.10 09 - SILICATES (Germanates)
  09.F - Tektosilicates without Zeolitic H2O
  09.FB -Tektosilicates with additional anions
 
09.FB.10 Bicchulite Ca2Al2SiO6(OH)2 I 43m 4 3m
 
09.FB.10 Danalite Fe4Be3(SiO4)3S P 43n 4 3m
 
09.FB.10 Hauyne (Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2 P 43n 4 3m
 
09.FB.10 Genthelvite Zn4Be3(SiO4)3S P 43n 4 3m
 
09.FB.10 Helvite Mn4Be3(SiO4)3S P 43n 4 3m
 
09.FB.10 Lazurite Na3Ca(Al3Si3O12)S P 43n 4 3m
 
09.FB.10 Kamaishilite Ca2Al2SiO6(OH)2 I-lattice Tetra
 
09.FB.10 Nosean Na8Al6Si6O24(SO4) P 43m 4 3m
 
09.FB.10 Sodalite Na8Al6Si6O24Cl2 P 43n 4 3m
 
09.FB.10 Tugtupite Na4AlBeSi4O12Cl I 4 4
 
09.FB.10 Tsaregorodtsevite N(CH3)4AlSi5O12 I 222 2 2 2
 

Other Lazurite Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Lazurite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - Tradeshop.com - The Rainbow of Gems
17 - WWW-MINCRYST

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Lazurite

Na3Ca(Al3Si3O12)S
Dana No: 76.02.03.04 Strunz No: 09.FB.10
Locality:

 

Notes:

 

 
   
 


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