Lazulite Mineral Data

[Newest Minerals] [Rare Minerals] [Cabinet Specimens] [About Us] [Image Gallery]
Dakota Matrix Minerals
Updated weekly, for the collector, educator, and researcher since 1996
Extensive Inventory of very Rare Minerals. Visa and Mastercard are Welcome

General Lazulite Information

Chemical Formula:

MgAl2(PO4)2(OH)2

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

Empirical Formula:

MgAl₂(PO₄)₂(OH)₂

IMA Status:

Valid Species (Pre-IMA) 1795

Locality:

Werfen, Salzburg, Austria Link to MinDat.org Location Data.

Name Origin:

From the Arabic azul - "sky" and the Greek lithos - "stone."

Name Pronunciation:

Lazulite

Synonym:

Blue spar

ICSD 31259

Klaprothite

PDF 34-136

Lazulite Image

Images:

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

Images:

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

Images:

Lazulite Whiteite-(CaMnMg)

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

Images:

Lazulite Trolleite

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

Axial Ratios:

a:b:c =0.9827:1:0.9938

Cell Dimensions:

a = 7.1526, b = 7.278, c = 7.2334, Z = 2; beta = 89.233° V = 376.51 Den(Calc)= 2.67

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/c

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.24(1), 3.206(0.85), 3.08(0.7),

Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above

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

Warning: this large pop-up is very compute intensive and may not work well with some computers.

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

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

Cleavage:

{001} Indistinct, {???} Indistinct

Color:

Blue, Blue green, Light blue, Black blue.

Density:

3 - 3.1, Average = 3.05

Diaphaneity:

Subtranslucent to opaque

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Massive - Granular - Common texture observed in granite and other igneous rock.

Habit:

Pyramidal - Crystals are shaped like pyramids.

Hardness:

5-6 - Between Apatite and Orthoclase

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Lazulite

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

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.

Pleochroism (x):

colorless or colorless.

Pleochroism (y):

light blue or greenish blue.

Pleochroism (z):

light blue or greenish blue.

Calculated Properties of Lazulite

Electron Density:

Bulk Density (Electron Density)=3.03 gm/cc
note: Specific Gravity of Lazulite =3.05 gm/cc.

Fermion Index:

Fermion Index = 0.0082971147
Boson Index = 0.9917028853

Photoelectric:

PE_Lazulite= 1.69 barns/electron
U=PE_Lazulite x rElectron Density= 5.12 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lazulite is Not Radioactive

Lazulite Classification

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

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

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Heinrich65)

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 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - MinMax(Deutsch)
13 - MinMax(English)
14 - Mineralienatlas (Deutsch)
15 - Philatelic Mineralogy
16 - QUT Mineral Atlas
17 - Ruff.Info
18 - Tradeshop.com - The Rainbow of Gems
19 - WWW-MINCRYST
20 - YupRocks
21 - theimage

Search for Lazulite using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Lazulite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Diamond Dan Publications

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Lazulite Mineral Data :

Ask about Lazulite 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 Español

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: