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⇱ Lulzacite: Mineral information, data and localities.

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Lulzacite

A valid IMA mineral species
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About LulzaciteHide

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Formula:
Sr2Fe2+(Fe2+,Mg)2Al4(PO4)4(OH)10
Colour:
Greyish-green
Lustre:
Vitreous
Hardness:
5½ - 6
Specific Gravity:
3.55
Crystal System:
Triclinic
Name:
To honor Mr. Yves Lulzac, from Nantes, France, geologist-engineer with BRGM (Bureau de Recherches Géologiques et Minières). He discovered the mineral.
Isostructural with:
A complex Sr phosphate isotypic with the Pb arsenate jamesite and the Pb phosphate désorite.


Unique IdentifiersHide

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Mindat ID:
7058
Long-form identifier:
mindat:1:1:7058:0

IMA Classification of LulzaciteHide

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Approved
IMA Formula:
Sr2Fe2+3Al4(PO4)4(OH)10
First published:
2000

Classification of LulzaciteHide

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8.BK.25

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
K : With medium-sized and large cations, (OH, etc.):RO4 = 2:1, 2.5:1

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
LulIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of LulzaciteHide

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Vitreous
Colour:
Greyish-green
Hardness:
5½ - 6 on Mohs scale
Cleavage:
None Observed
None
Density:
3.55 g/cm3 (Measured)    3.58 g/cm3 (Calculated)

Optical Data of LulzaciteHide

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Type:
Biaxial (-)
RI values:
nα = 1.654 nβ = 1.674 nγ = 1.684
2V:
Measured: 45° to 65°, Calculated: 68°
Max. Birefringence:
δ = 0.030
Based on recorded range of RI values above.

Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.

Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.

Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.

Surface Relief:
Moderate
Dispersion:
r < v distinct
Pleochroism:
Visible
Comments:
brown-yellow to pale blue-violet

Chemistry of LulzaciteHide

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Mindat Formula:
Sr2Fe2+(Fe2+,Mg)2Al4(PO4)4(OH)10
Element Weights:
Element% weight
O41.571 %
Sr17.512 %
Fe16.742 %
P12.381 %
Al10.786 %
H1.007 %

Calculated from ideal end-member formula.

Crystallography of LulzaciteHide

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Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 5.457 Å, b = 9.131 Å, c = 9.769 Å
α = 108.47°, β = 91.72°, γ = 97.44°
Ratio:
a:b:c = 0.598 : 1 : 1.07
Unit Cell V:
456.5 ų
Z:
1

Crystal StructureHide

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0018779LulzaciteLeone P, Palvadeau P, Moelo Y (2000) Structure cristalline d'un nouvel hydroxyphosphate naturel de strontium, fer et aluminium (lulzacite), Sr2Fe(Fe0,63Mg0,37)2Al4(PO4)4(OH)10 Chimie de l'etat Solide et Cristallochimie 3 301-3082000Saint-Aubin-des-Chateaux, Loire-Atlantique, France0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

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Powder Diffraction Data:
d-spacingIntensity
4.47 Å(41)
3.591 Å(50)
3.218 Å(100)
3.132 Å(62)
3.016 Å(56)
2.878 Å(42)
2.812 Å(62)
2.653 Å(44)
2.634 Å(43)

Geological EnvironmentHide

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Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Near-surface Processes
23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47)

Type Occurrence of LulzaciteHide

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General Appearance of Type Material:
Grayish green aggregates up to several centimeters long. Grains are typically anhedral, rarely euhedral to 4 mm.
Place of Conservation of Type Material:
Mineralogical Museum of the École des Mines, Paris, France.
Museum national d’histoire naturelle, Paris, France.
Collection de minéralogie de la Sorbonne (Paris University), France.
Geological Setting of Type Material:
In quartz veinlets, that occur at the contact between Ordovician quartzite and limestone.
Associated Minerals at Type Locality:

Synonyms of LulzaciteHide

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Other Language Names for LulzaciteHide

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Dutch:Lulzaciet
German:Lulzacit
Spanish:Lulzacita

Common AssociatesHide

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Associated Minerals Based on Photo Data:
10 photos of Lulzacite associated with SideriteFeCO3
4 photos of Lulzacite associated with QuartzSiO2

Related Minerals - Strunz-mindat GroupingHide

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8.BK.05BrazilianiteNaAl3(PO4)2(OH)4Mon. 2/m
8.BK.10NeustädteliteBi2Fe3+(Fe3+,Co)(AsO4)2(O,OH)4Tric. 1 : P1
8.BK.10CobaltneustädteliteBi2Fe3+(Co,Fe3+)(AsO4)2(O,OH)4Tric. 1 : P1
8.BK.10MedenbachiteBi2Fe3+Cu2+(AsO4)2O(OH)3Tric. 1 : P1
8.BK.15CuretoniteBa(Al,Ti)(PO4)(OH,O)FMon. 2/m
8.BK.20HeyitePb5Fe2+2(VO4)2O4Mon. 2/m : P21/m
8.BK.25JamesitePb2Zn(Fe2+,Zn)2Fe3+4(AsO4)4(OH)10Tric. 1 : P1
8.BK.25DésoritePb2(Fe3+6Zn)O2(PO4)4(OH)8Tric. 1 : P1
8.BK.30NishanbaeviteKAl2O(AsO4)(SO4)Orth. mmm(2/m2/m2/m) : Pbcm
8.BK.35ZircarsiteNa18Cu12ZrO8(AsO4)8Cl6Iso. m3m(4/m32/m) : Pm3m
8.BK.35ArsmiranditeNa18Cu12Fe3+O8(AsO4)8Cl5Mon. 2/m : B2/m
8.BK.35LebedeviteK4Na14Cu14O8(AsO4)8Cl6Tet. 4/mmm(4/m2/m2/m) : I4/mmm
8.BK.35Lehmannite Na18Cu12TiO8(AsO4)8FCl5Mon. 2/m : B2/m

Other InformationHide

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Notes:
Slightly soluble in hot HNO3 but inert in HCl.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for LulzaciteHide

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mindat.org URL:
https://www.mindat.org/min-7058.html
Please feel free to link to this page.

References for LulzaciteHide

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Reference List:

Localities for LulzaciteHide

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Showing 1 localities.

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

Locality ListHide

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👁 Image
- This locality has map coordinates listed. 👁 Image
- This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. 👁 Image
- Good crystals or important locality for species. 👁 Image
- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
France (TL)
  • Pays de la Loire
    • Loire-Atlantique
      • Châteaubriant-Ancenis
        • Saint-Aubin-des-Châteaux
Moëlo et al. (2000) +1 other reference
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