Lazulite Mineral Data (original) (raw)

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

Klaprothite

PDF 34-136

Lazulite Image

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

Click Here for Larger Lazulite Image Lazulite Bystrite 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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Click Here for Larger Lazulite Image Lazulite 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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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 - PrismaticH-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:

Mouse
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RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
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| | Forms:( 1 1 1) ( 1 0 1) Warning: this large pop-up is very compute intensive and may not work well with some computers. | | -------------------------------------------------------------------------------------------------------------------------------------- |

Click Here for Large Lazulite Structure Window Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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| | Lindberg M L , Christ C L , Acta Crystallographica , 12 (1959) p.695-697, Crystal structures of the isostructural minerals lazulite,, scorzalite and barbosalite View Additional jPOWD Structure files for Lazulite [1] | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

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:

41.10.01.01 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.10)where (A++ B++)3 (XO4)2 Zq

(41.10.01)Lazulite Group

41.10.01.01 Lazulite MgAl2(PO4)2(OH)2 P 21/c 2/m

41.10.01.02 Scorzalite (Fe,Mg)Al2(PO4)2(OH)2 P 2/c 2/m

41.10.01.03 Hentschelite CuFe2(PO4)2(OH)2 P 21/n 2/m

41.10.01.04 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
19 - WWW-MINCRYST
20 - YupRocks
21 - theimage

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Ask about Lazulite here :
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Print or Cut-and-Paste your Lazulite Specimen Label here :

Lazulite

MgAl2(PO4)2(OH)2
Dana No: 41.10.01.01 Strunz No: 08.BB.40
Locality:

Notes: