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Lazulite

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Formula:
(Mg,Fe
2+
 
)Al
 
2
(PO
 
4
)
 
2
(OH)
 
2
System:MonoclinicColour:Blue, sky-blue, bluish ...
Hardness:5½ - 6
Member of:Lazulite Group
Name:Named in 1795 by Marten H. Klaproth from the Arabic word meaning "heaven," in allusion to its colour.


The magnesium analogue of Scorzalite.

Not to be confused with the similarly named lazurite.

Visit gemdat.org for gemological information about Lazulite. Currently in public beta-test.

Classification of Lazulite

IMA status:Approved
Strunz 8th edition ID:7/B.08-20
Nickel-Strunz 10th (pending) edition ID:8.BB.40

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
B : With only medium-sized cations, (OH, etc.):RO4 about 1:1
Dana 8th edition ID:41.10.1.1

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
10 : (AB)3(XO4)2Zq
Hey's CIM Ref.:19.14.29

19 : Phosphates
14 : Phosphates of Fe and other metals
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Type Occurrence of Lazulite

Type Locality:Freßnitzgraben, Krieglach, Fischbacher Alpen, Styria, Austria
Place of Conservation of Type Material:Natural History Museum, London 83304
Year of Discovery:1795
Associated Minerals at type locality:
Wagnerite

Occurrences of Lazulite

Geological Setting:In metamorphic rocks, border zones of complex granitic pegmatites, alluvial deposits.

Physical Properties of Lazulite

Lustre:Vitreous, Sub-Vitreous, Resinous, Greasy
Diaphaneity (Transparency):Transparent, Translucent
Colour:Blue, sky-blue, bluish white
Streak:White
Hardness (Mohs):5½ - 6
Tenacity:Brittle
Cleavage:Poor/Indistinct
Poor to good {110}
Indistinct on {101}
Fracture:Irregular/Uneven, Splintery
Density (measured):3.122 - 3.24 g/cm3
Density (calculated):3.144 g/cm3

Crystallography of Lazulite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P21/b
Space Group Setting:P21/c
Cell Parameters:a = 7.144(1) Å, b = 7.278(1) Å, c = 7.228(1) Å
β = 120.5(1)°
Ratio:a:b:c = 0.982 : 1 : 0.993
Unit Cell Volume:V 323.81 ų (Calculated from Unit Cell)
Z:2
Morphology:Crystals commonly acute to stubby dipyramidal with large {111} and {111}, and small {101}; also tabular on (111) or (101). Granular to compact massive.
Twinning:Common on {100}, lamellar or polysynthetic at times, with composition plane {001} or {100} and usually with a re-entrant angle; rare on {223}, by reflection on {221}. Reported also on {210} and {021}.
Crystal Atlas:
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Lazulite no.3 - Goldschmidt (1913-1926)
Lazulite no.11 - Goldschmidt (1913-1926)

About Crystal Atlas

The mindat.org Crystal Atlas allows you to view a selection of crystal drawings of real and idealised crystal forms for this mineral and, in certain cases, 3d rotating crystal objects. The 3d models and HTML5 code are kindly provided by www.smorf.nl.

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X-Ray Powder Diffraction:
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Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data:
Data courtesy of RRUFF project at University of Arizona, used with permission.
X-Ray Powder Diffraction:
d-spacingIntensity
4.73 (18)
3.23 (100)
3.20 (59)
3.14 (55)
3.077 (42)
2.548 (18)
1.571 (18)

Optical Data of Lazulite

Type:Biaxial (-)
RI values: nα = 1.604 - 1.626 nβ = 1.626 - 1.654 nγ = 1.637 - 1.663
2V:Measured: 61° to 70°, Calculated: 58° to 64°
Birefringence:0.035
Maximum Birefringence:δ = 0.033 - 0.037

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r < v weak
Optical Extinction:Y = b; X ^ c = 10°
Pleochroism:Strong
Comments:X= Colourless
Y= Blue
Z= Darker blue

Chemical Properties of Lazulite

Formula:
(Mg,Fe
2+
 
)Al
 
2
(PO
 
4
)
 
2
(OH)
 
2
Simplified for copy/paste:(Mg,Fe2+)Al2(PO4)2(OH)2
Essential elements:Al, H, Mg, O, P
All elements listed in formula:Al, Fe, H, Mg, O, P
Common Impurities:Fe,Mn

Relationship of Lazulite to other Species

Series:Forms a series with Scorzalite (see here)
Member of:Lazulite Group
Other Members of Group:

- +
Barbosalite
Fe
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
Hentschelite
CuFe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
Scorzalite
Fe
2+
 
Al
 
2
(PO
 
4
)
 
2
(OH)
 
2
Wilhelmkleinite
ZnFe
3+
2
(AsO
 
4
)
 
2
(OH)
 
2
Common Associates:
SillimaniteRutileQuartzPyrophylliteMuscovite
KyaniteGarnet Structural GroupDumortieriteCorundumAndalusite
Related Minerals - Nickel-Strunz Grouping):

- +
8.BB.05Amblygonite
LiAl(PO
 
4
)F
8.BB.05Montebrasite
LiAl(PO
 
4
)(OH)
8.BB.05Tavorite
LiFe
3+
 
(PO
 
4
)(OH)
8.BB.10Triplite
(Mn
2+
 
,Fe
2+
 
)
 
2
(PO
 
4
)(F,OH)
8.BB.10Zwieselite
(Fe
2+
 
,Mn
2+
 
)
 
2
(PO
 
4
)F
8.BB.15Sarkinite
Mn
2+
2
(AsO
 
4
)(OH)
8.BB.15Triploidite
(Mn
2+
 
,Fe
2+
 
)
 
2
(PO
 
4
)(OH)
8.BB.15Wagnerite
(Mg,Fe
2+
 
)
 
2
(PO
 
4
)F
8.BB.15Wolfeite
(Fe
2+
 
,Mn
2+
 
)
 
2
(PO
 
4
)(OH)
8.BB.15Stanĕkite
(Mn
2+
 
,Fe
2+
 
,Mg)Fe
3+
 
(PO
 
4
)O
8.BB.15Joosteite
Mn
2+
 
(Mn
3+
 
,Fe
3+
 
)(PO
 
4
)O
8.BB.15Hydroxylwagnerite
Mg
 
2
(PO
 
4
)(OH)
8.BB.20Holtedahlite
Mg
 
2
(PO
 
4
)(OH)
8.BB.20Satterlyite
(Fe
2+
 
,Mg,Fe
3+
 
)
 
2
(PO
 
4
)(OH,O)
8.BB.25Althausite
Mg
 
4
(PO
 
4
)
 
2
(OH,O)(F,☐)
8.BB.30Adamite
Zn
 
2
(AsO
 
4
)(OH)
8.BB.30Eveite
Mn
2+
2
(AsO
 
4
)(OH)
8.BB.30Libethenite
Cu
 
2
(PO
 
4
)(OH)
8.BB.30Olivenite
Cu
 
2
(AsO
 
4
)(OH)
8.BB.30Zincolibethenite
CuZn(PO
 
4
)(OH)
8.BB.30Zincolivenite
CuZn(AsO
 
4
)(OH)
8.BB.30Auriacusite
Fe
3+
 
Cu
2+
 
(AsO
 
4
)O
8.BB.35Paradamite
Zn
 
2
(AsO
 
4
)(OH)
8.BB.35Tarbuttite
Zn
 
2
(PO
 
4
)(OH)
8.BB.40Barbosalite
Fe
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
8.BB.40Hentschelite
CuFe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
8.BB.40Scorzalite
Fe
2+
 
Al
 
2
(PO
 
4
)
 
2
(OH)
 
2
8.BB.40Wilhelmkleinite
ZnFe
3+
2
(AsO
 
4
)
 
2
(OH)
 
2
8.BB.45Trolleite
Al
 
4
(PO
 
4
)
 
3
(OH)
 
3
8.BB.50Namibite
Cu(BiO)
 
2
(VO
 
4
)(OH)
8.BB.55Phosphoellenbergerite
Mg
 
14
(PO
 
4
)
 
6
(HPO
 
4
,CO
 
3
)
 
2
(OH)
 
6
8.BB.60Urusovite
CuAl(AsO
 
4
)O
8.BB.65Theoparacelsite
Cu
 
3
(As
 
2
O
 
7
)(OH)
 
2
8.BB.70Turanite
Cu
 
5
(VO
 
4
)
 
2
(OH)
 
4
8.BB.75Stoiberite
Cu
 
5
(VO
 
4
)
 
2
O
 
2
8.BB.80Fingerite
Cu
 
11
(VO
 
4
)
 
6
O
 
2
8.BB.85Averievite
Cu
 
6
(VO
 
4
)
 
2
O
 
2
Cl
 
2
8.BB.90Lipscombite
(Fe
2+
 
,Mn
2+
 
)Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
8.BB.90Richellite
CaFe
3+
2
(PO
 
4
)
 
2
(OH,F)
 
2
8.BB.90Zinclipscombite
ZnFe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
Related Minerals - Hey's Index Grouping:

- +
19.14.1Cyrilovite
NaFe
3+
3
(PO
 
4
)
 
2
(OH)
 
4
· 2H
 
2
O
19.14.2Kidwellite
NaFe
3+
9
(PO
 
4
)
 
6
(OH)
 
11
· 3H
 
2
O
19.14.3Rosemaryite
(Na,Ca,Mn)(Mn,Fe
2+
 
)(Fe
3+
 
,Mg)Al(PO
 
4
)
 
3
19.14.4Wyllieite
(Na,Ca,Mn)(Mn,Fe)(Fe,Mg)Al(PO
 
4
)
 
3
19.14.5Ferrowyllieite
(Na,Ca,Mn)(Fe,Mn)(Fe,Fe,Mg)Al(PO
 
4
)
 
3
19.14.6Natrodufrénite
NaFe
2+
 
Fe
3+
5
(PO
 
4
)
 
4
(OH)
 
6
· 2H
 
2
O
19.14.7Leucophosphite
KFe
3+
2
(PO
 
4
)
 
2
(OH) · 2H
 
2
O
19.14.8Spheniscidite
(NH
 
4
,K)(Fe
3+
 
,Al)
 
2
(PO
 
4
)
 
2
(OH) · 2H
 
2
O
19.14.9Burangaite
NaFe
2+
 
Al
 
5
(PO
 
4
)
 
4
(OH)
 
6
· 2H
 
2
O
19.14.10Satterlyite
(Fe
2+
 
,Mg,Fe
3+
 
)
 
2
(PO
 
4
)(OH,O)
19.14.11Ushkovite
MgFe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
· 8H
 
2
O
19.14.12Garyansellite
(Mg,Fe)
 
3
(PO
 
4
)
 
2
(OH,O) · 1.5H
 
2
O
19.14.13Thadeuite
Ca(Mg,Fe
2+
 
)
 
3
(PO
 
4
)
 
2
(OH,F)
 
2
19.14.14Anapaite
Ca
 
2
Fe
2+
 
(PO
 
4
)
 
2
· 4H
 
2
O
19.14.15Xanthoxenite
Ca
 
4
Fe
3+
2
(PO
 
4
)
 
4
(OH)
 
2
· 3H
 
2
O
19.14.16Calcioferrite
Ca
 
2
Fe
3+
2
(PO
 
4
)
 
3
(OH) · 7H
 
2
O
19.14.17Mitridatite
Ca
 
2
Fe
3+
3
(PO
 
4
)
 
3
O
 
2
· 3H
 
2
O
19.14.18Mélonjosephite
CaFe
2+
 
Fe
3+
 
(PO
 
4
)
 
2
(OH)
19.14.19Delvauxite
CaFe
 
4
(PO
 
4
,SO
 
4
)
 
2
(OH)
 
8
· 4-6H
 
2
O not confirmed ·
19.14.20Collinsite
Ca
 
2
(Mg,Fe
2+
 
)(PO
 
4
)
 
2
· 2H
 
2
O
19.14.21Segelerite
Ca
 
2
Mg
 
2
Fe
3+
2
(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
19.14.22Kingsmountite
Ca
 
4
(Fe
2+
 
,Mn
2+
 
)Al
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 12H
 
2
O
19.14.23Vauxite
Fe
2+
 
Al
 
2
(PO
 
4
)
 
2
(OH)
 
2
· 6H
 
2
O
19.14.24Metavauxite
Fe
2+
 
Al
 
2
(PO
 
4
)
 
2
(OH)
 
2
· 8H
 
2
O
19.14.25Paravauxite
Fe
2+
 
Al
 
2
(PO
 
4
)
 
2
(OH)
 
2
· 8H
 
2
O
19.14.26Sigloite
Fe
3+
 
Al
 
2
(PO
 
4
)
 
2
(OH)
 
3
· 7H
 
2
O
19.14.27Cacoxenite
Fe
3+
24
Al(PO
 
4
)
 
17
O
 
6
(OH)
 
12
· 17H
 
2
O
19.14.28Koninckite
Fe
3+
 
PO
 
4
· 3H
 
2
O
19.14.30Scorzalite
Fe
2+
 
Al
 
2
(PO
 
4
)
 
2
(OH)
 
2
19.14.31Souzalite
(Mg,Fe
2+
 
)
 
3
(Al,Fe
3+
 
)
 
4
(PO
 
4
)
 
4
(OH)
 
6
· 2H
 
2
O
19.14.32Gormanite
(Fe
2+
 
,Mg)
 
3
(Al,Fe
3+
 
)
 
4
(PO
 
4
)
 
4
(OH)
 
6
· 2H
 
2
O
19.14.33Zaïrite
Bi(Fe
3+
 
,Al)
 
3
(PO
 
4
)
 
2
(OH)
 
6

Other Names for Lazulite

Synonyms:
Azure SparAzurite (of Jameson)BerkeleyiteBerkeyiteBlue Feldspar
Blue ZeoliteGersbyiteKlaprothite (of Beudant)MolliteSiderite (of Moll, 1799)
TetragophosphiteTyrolite (of Delamétherie)Voraulite (of Delamétherie)
Other Languages:
German:Lazulith
Berkeyit
Berlinerblau
Blauspat
Blauspath
Dichter blauer Feldspath
Gersbyit
Himmelblau Fossil von Steiermark
Klaprothin
Klaprothine
Lazulit
Lazulith (of Klaproth)
Lazulith (of Mohs)
Mollit
Natürliche Smalt
Phosphorsaure Thonerde
Smalteblaues Fossil von Vorau
Tetragophosphit
Voraulit
Wahrscheinlich neues Fossil aus Salzburg
Russian:Лазулит
Simplified Chinese:天蓝石
Spanish:Berkeyita
Gersbyita
Lazulita
Mollita
Tetragophosphita
Voraulita
Varieties:
Calcium-lazulite

Other Information

Fluorescence in UV light:Not fluorescent in UV
Other Information:Slowly soluble in hot acids.
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Lazulite

Reference List:

- +
Widenmann (1791) Bergmaennusches Journal, Freiberg (Neues Bergmannische Journal): 346 (as Himmelblau Fossil von Steiermark).

Stütz (1791) Schriften der Gesellschaft naturforschender Freunde in Berlin: 9: 352 (as Smalteblaue Fossil von Vorau).

Klaproth (1792) Schriften der Gesellschaft naturforschender Freunde in Berlin: 10: 90 (as Lazulit).

Stütz (1793) Einricht. Nat. Wien: 49 (as Unächter Lasurstein).

Klaproth (1795) Beitr. Chem.. Kenntn. Min.: 1: 197 (as Lazulit).

Klaproth (1795) Klaproth, M.H. (1795) Beiträge zur chemischen Kenntniss der Mineralkörper. Vol. 1: 197 (as Dichter blauer Feldspath).

von Moll (1799) Berg.- und hüttenmännisches Jahrbuch, Vienna: 4: 71 (as Wahrscheinlich neue Fossil aus Salzburg).

Haberle (1804) Handbuch (as Mollit).

Mohs, F. (1804) Des Herrn J.F. Null Mineralien-Kabinet, nach einem, durchaus auf aussere Kennzeichnen gegründeten Systeme geordnet. 3 abthl., Vienna: 1: 427 (as Lazulith [of Mohs]).

Jameson, R. (1805) Treatise on the External Characters of Minerals. Edinburgh: 2: 542 (as Azurite).

Klaproth, M.H. (1807) Beiträge zur chemischen Kenntniss der Mineralkörpers, vol. 4: 279 (as Lazulith).

Delamétherie, J.C. (1812) Leçons de minéralogie. 8vo, Paris, volume 2 (as Voraulite).

Fuchs (1818) Journal für Chemie und Physik, Nuremberg: 24: 373 (as Phosphorsäure Thonerde).

Beudant, F.S. (1824), Trailé élémentaire de Minéralogie, Paris: 464 (as Klaprothite).

Beudant, F.S. (1832), Trailé élémentaire de Minéralogie, second edition, 2 volumes: 2: 576 (as Klaprothine).

Prüfer (1847) Naturwissenschaftliche Abhandlungen, Vienna: 1: 169.

Dana, E.S. (1892) System of Mineralogy, 6th. Edition, New York: 798.

Goldschmidt, V. (1916) Atlas der Krystallformen. 9 volumes, atlas, and text: vol. 5 (3?): 131.

Watson (1921) Journal of the Washington Academy of Science: 11: 386.

Kerr (1926) Jeweler’s Circ.: 92: 67 (as Berkeyite).

Hintze, Carl (1933) Handbuch der Mineralogie. Berlin and Leipzig. 6 volumes: 1 [3B]: 1132; 1 [4B]: 1126.

Meixner (1937) Berg.- und hüttenmännisches Jahrbuch, Montan. Hochsch. Leoben: 85, 1, 33.

Baier (1941) Zentralblatt Mineralien: 145.

Berry (1948) American Mineralogist: 33: 750.

Pecora, W.T. and Fahey, J.J. (1949) American Mineralogist: 34: 83, 684.

Pecora, W.T. and Fahey, J.J. (1950) The lazulite-scorzalite isomorphous series. American Mineralogist 35, 1-18.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 908-911.

Neues Jahrbuch für Mineralogie, Monatshefte (1983): 410-416.

Anthony, J.W., Bideaux, R.A., Bladh, K.W., and Nichols, M.C. (2000) Handbook of Mineralogy, Volume IV. Arsenates, Phosphates, Vanadates. Mineral Data Publishing, Tucson, AZ, 680 pp.: 307.

Internet Links for Lazulite

Search Engines:
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  • External Links:
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  • Look for Lazulite on Athena Mineralogy
  • Look for Lazulite on Wikipedia
  • Look for Lazulite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Lazulite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
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  • Fabre Minerals - search for Lazulite specimens
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  • Specimens:The following Lazulite specimens are currently listed for sale on minfind.com.

    Localities for Lazulite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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