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Lazulite information


Not to be confused with Lazurite or Lapis lazuli.
Lazulite
Lazulite, Near Rapid Creek, Yukon, Canada
General
CategoryPhosphate mineral
Formula
(repeating unit)		(Mg,Fe2+)Al2(PO4)2(OH)2
IMA symbolLzl[1]
Strunz classification8.BB.40
Crystal systemMonoclinic
Crystal classPrismatic (2/m)
(same H-M symbol)
Space groupP21/c
Unit cella = 7.144(1), b = 7.278(1)
c = 7.228(1) [Å]; β = 120.5(1)°; Z = 2
Identification
ColorAzure-blue, sky-blue, bluish white, yellow-green, blue-green, rarely green
Crystal habitTabular, acute to stubby bipyramidal crystals; granular, massive
TwinningCommon by several twin laws
CleavagePoor to good on {110}, indistinct on {101}
FractureUneven, splintery
TenacityBrittle
Mohs scale hardness5.5–6.0
LusterVitreous
StreakWhite
DiaphaneityTransparent to translucent to nearly opaque
Specific gravity3.122–3.240
Optical propertiesBiaxial (−)
Refractive indexnα = 1.604 – 1.626 nβ = 1.626 – 1.654 nγ = 1.637 – 1.663
Birefringenceδ = 0.033 – 0.037
PleochroismStrong: X = colorless, Y = blue, Z = darker blue
2V angleMeasured: 61° to 70°
FusibilityInfusible
SolubilityInsoluble
References[2][3][4][5]

Lazulite ((Mg,Fe2+)Al2(PO4)2(OH)2)[3] is a blue, phosphate mineral containing magnesium, iron, and aluminium phosphate. Lazulite forms one endmember of a solid solution series with the darker iron rich scorzalite.[3][5]

Lazulite crystallizes in the monoclinic system. Crystal habits include steep bipyramidal or wedge-shaped crystals.[6] Lazulite has a Mohs hardness of 5.5 to 6 and a specific gravity of 3.0 to 3.1. It is infusible and insoluble.[5]

  1. ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
  2. ^ Cite error: The named reference HBM was invoked but never defined (see the help page).
  3. ^ a b c Mindat.org
  4. ^ Webmineral data
  5. ^ a b c Hurlbut, Cornelius S.; Klein, Cornelius, 1985, Manual of Mineralogy, 20th ed., Wiley, ISBN 0-471-80580-7
  6. ^ "Lazulite" on Minerals.net.

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Lazulite

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Lazulite ((Mg,Fe2+)Al2(PO4)2(OH)2) is a blue, phosphate mineral containing magnesium, iron, and aluminium phosphate. Lazulite forms one endmember of a...

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Lazurite

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Other blue minerals, such as the carbonate azurite and the phosphate lazulite, may be confused with lazurite, but are easily distinguished with careful...

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Grandidierite

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from other gems, lazulites can occur with blue-green colors and show colorless/blue/dark blue pleochroism. Nevertheless, lazulites have somewhat higher...

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Turquoise

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variscite and faustite; chrysocolla (especially when impregnating quartz); lazulite; smithsonite; hemimorphite; wardite; and a fossil bone or tooth called...

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Phosphate mineral

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Hinsdalite PbAl3(PO4)(SO4)(OH)6 Pyromorphite Pb5(PO4)3Cl Amblygonite LiAlPO4F Lazulite (Mg,Fe)Al2(PO4)2(OH)2 Wavellite Al3(PO4)2(OH)3·5H2O Turquoise CuAl6(PO4)4(OH)8·5H2O...

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Berlinite

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minerals include augelite, attakolite, kyanite, pyrophyllite, scorzalite, lazulite, gatumbaite, burangaite, amblygonite, phosphosiderite, purpurite, apatite...

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List of Canadian provincial and territorial symbols

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Provincial grass: needle-and-thread grass, fruit emblem: Saskatoon berry, Fossil: Tyrannosaurus rex Yukon Common raven - - Fireweed Subalpine fir Lazulite - -...

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Woodhouseite

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masses of lazulite, MgAl2(PO4)2(OH)2. Associated Minerals at the type locality include topaz, Al2SiO4F2, quartz, SiO2, augelite, Al2PO4(OH)3, lazulite, MgAl2(PO4)2(OH)2...

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Symbols of Yukon

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Raven is called "crow" by Yukon First Nations people. Gemstone Lazulite February 1976 Lazulite is found in the layered sedimentary rock of the Blow River...

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Lipscombite

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This group is within the non-silicate, category 8, anhydrous phosphates, lazulite supergroup. The mineral lipscombite was first made artificially and then...

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Scorzalite

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endmember of a solid solution series with the lighter, more magnesium-rich lazulite. Scorzalite crystallizes in the monoclinic system in a dipyramidal form...

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List of mineral symbols

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Lévyne-Na Lév-Na Litvinskite Ltv Lumsdenite Lum Långbanshyttanite Lbs Lazulite Lzl Leydetite Ley Liudongshengite Ldh Lüneburgite Lbu Langbeinite Lbn Lazurite...

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Hopeite

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the University of Edinburgh. It has been found in Zambia associated with lazulite. Hopeite is one of the two conversion minerals arising from the application...

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Svanbergite

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often replacing apatite. It occurs with pyrophyllite, kyanite, andalusite, lazulite, augelite, alunite, kaolinite and quartz. Wikimedia Commons has media related...

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Whiteite

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from Rapid Creek in the Yukon, Canada, is often associated with deep blue lazulite crystals (33 out of 49 photos on Mindat.org). The optical class is thought...

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Augelite

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hydrothermal ore deposits. It occurs in association with attakolite, svanbergite, lazulite, hematite, trolleite, berlinite, rutile, pyrophyllite, baryte, arsenopyrite...

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Langgan

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that langgan is "a stone, but like a pearl", and suggests it was possibly lazulite or lapis lazuli, which Laufer calls "purely conjectural". The c. 4th-3rd...

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