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Lazulite Mineral Data

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General Lazulite Information

Help on Chemical  Formula: Chemical Formula: MgAl2(PO4)2(OH)2
Help on Composition: Composition: Molecular Weight = 302.23 gm
   Magnesium    8.04 %  Mg   13.34 % MgO
   Aluminum    17.86 %  Al   33.74 % Al2O3
   Phosphorus  20.50 %  P    46.97 % P2O5
   Hydrogen     0.67 %  H     5.96 % H2O
   Oxygen      52.94 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: MgAl2(PO4)2(OH)2
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1795
Help on Locality: Locality: Werfen, Salzburg, Austria Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Arabic azul - "sky" and the Greek lithos - "stone."
Help on Name Pronunciation: Name Pronunciation: Lazulite Say LAZULITE
Help on Synonym: Synonym: Blue spar
  ICSD 31259
  PDF 34-136

Lazulite Image

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  Bystrite   Lazulite

Comments: Brownish-yellow bystrite grains with blue lazulite in an igneous rock.
Location: Malo-Bystrinskoye lazurite deposit, Tunka Valley, Sludyanka, Lake Baikal Region, Russia. Scale: Picture size 7 mm.
© Thomas Witzke / Abraxas-Verlag

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Comments: Lustrous dark blackish-blue crystals of lazulite to 5 mm in size.
Location: Crosscut Creek, Rapid Creek, Yukon Territory, Canada. Scale: 3 x 4.2 x 1.5 cm.
© Dan Weinrich

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  Whiteite-(CaMnMg)   Lazulite

Comments: Light beige-colored whiteite-(CaMnMg) crystal perched on dark blue lazulite.
Location: Rapid Creek, Yukon Territory, Canada. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

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  Trolleite   Lazulite

Comments: Pale blue trolleite with darker blue lazulite.
Location: Champion Mine, White Mountains, Mono County, California. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Lazulite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9827:1:0.9938
Help on Cell Dimensions: Cell Dimensions: a = 7.1526, b = 7.278, c = 7.2334, Z = 2; beta = 89.233° V = 376.51 Den(Calc)= 2.67
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.24(1), 3.206(0.85), 3.08(0.7),
Help on Forms: Forms:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 1 1 1) ( 1 0 1)

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Physical Properties of Lazulite

Help on Cleavage: Cleavage: {001} Indistinct, {???} Indistinct
Help on Color: Color: Blue, Blue green, Light blue, Black blue.
Help on Density: Density: 3 - 3.1, Average = 3.05
Help on Diaphaneity: Diaphaneity: Subtranslucent to opaque
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Habit: Habit: Pyramidal - Crystals are shaped like pyramids.
Help on Hardness: Hardness: 5-6 - Between Apatite and Orthoclase
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Lazulite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.04 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.188 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2408,KPDmeas= 0.2108,KC= 0.2027
Ncalc = 1.54 - 1.63
Help on Optical Data: Optical Data: Biaxial (-), a=1.604-1.637, b=1.631-1.667, g=1.642-1.677, bire=0.0380-0.0400, 2V(Calc)=58-64, 2V(Meas)=61-70. Dispersion weak, r < v.
Help on Pleochroism (x): Pleochroism (x): colorless or colorless.
Help on Pleochroism (y): Pleochroism (y): light blue or greenish blue.
Help on Pleochroism (z): Pleochroism (z): light blue or greenish blue.

Calculated Properties of Lazulite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.03 gm/cc
note: Specific Gravity of Lazulite =3.05 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0082971147
Boson Index = 0.9917028853
Help on Photoelectric: Photoelectric: PELazulite = 1.69 barns/electron
U=PELazulite x rElectron Density= 5.12 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lazulite is Not Radioactive

Lazulite Classification

Help on  Dana Class: Dana Class: (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.10)where (A++ B++)3 (XO4)2 Zq
  (41.10.01)Lazulite Group Lazulite MgAl2(PO4)2(OH)2 P 21/c 2/m Scorzalite (Fe,Mg)Al2(PO4)2(OH)2 P 2/c 2/m Hentschelite CuFe2(PO4)2(OH)2 P 21/n 2/m Barbosalite FeFe2(PO4)2(OH)2 P 21/c 2/m
Help on  Strunz Class: Strunz Class: 08.BB.40 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BB -With only medium-sized cations, (OH, etc.):RO4 � 1:1
08.BB.40 Barbosalite FeFe2(PO4)2(OH)2 P 21/c 2/m
08.BB.40 Wilhelmkleinite! ZnFe3(AsO4)2(OH)2 P 21/n 2/m
08.BB.40 Hentschelite CuFe2(PO4)2(OH)2 P 21/n 2/m
08.BB.40 Lazulite MgAl2(PO4)2(OH)2 P 21/c 2/m
08.BB.40 Scorzalite (Fe,Mg)Al2(PO4)2(OH)2 P 2/c 2/m

Other Lazulite Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Heinrich65)
Help on See Also: See Also: Links to other databases for Lazulite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - CalTech Mineral Spectroscopy
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - Philatelic Mineralogy
16 - QUT Mineral Atlas
17 - Ruff.Info
18 - Tradeshop.com - The Rainbow of Gems
20 - YupRocks
21 - theimage

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Dana No: Strunz No: 08.BB.40





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