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Lulzacite

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Formula:
Sr2Fe2+(Fe2+,Mg)2Al4(PO4)4(OH)10
System:
Triclinic
Colour:
Greyish-green
Lustre:
Vitreous
Hardness:
5½ - 6
Name:
To Honor Mr. Yves Lulzac, discoverer of the mineral.
Isostructural with:
A complex phosphate isotypic with jamesite.

Classification of Lulzacite

Approved
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
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Type Occurrence of Lulzacite

Physical Properties of Lulzacite

Vitreous
Colour:
Greyish-green
Hardness (Mohs):
5½ - 6

Crystallography of Lulzacite

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 5.457Å, b = 9.131Å, c = 9.769Å
α = 108.47°, β = 91.72°, γ = 97.44°
Ratio:
a:b:c = 0.598 : 1 : 1.07
Unit Cell Volume:
V 456.5 ų
Z:
1
X-Ray Powder Diffraction Data:
d-spacingIntensity
4.47 (41)
3.591 (50)
3.218 (100)
3.132 (62)
3.016 (56)
2.878 (42)
2.812 (62)
2.653 (44)
2.634 (43)
(

Optical Data of Lulzacite

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
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r < v distinct

Chemical Properties of Lulzacite

Formula:
Sr2Fe2+(Fe2+,Mg)2Al4(PO4)4(OH)10
Essential elements:
All elements listed in formula:

Relationship of Lulzacite to other Species

8.BK.05BrazilianiteNaAl3(PO4)2(OH)4
8.BK.10MedenbachiteBi23+Fe3+(Cu,Fe3+)(AsO4)2(OH,O)4
8.BK.10NeustädteliteBi23+Fe3+(Fe3+,Co)(O,OH)4(AsO4)2
8.BK.10CobaltneustädteliteBi23+Fe3+(Co,Fe3+)(O,OH)4(AsO4)2
8.BK.15CuretoniteBa(Al,Ti)(PO4)(OH,O)F
8.BK.20HeyitePb5Fe22+(VO4)2O4
8.BK.25JamesitePb2Zn(Fe2+,Zn)2Fe43+(AsO4)4(OH)10

Other Names for Lulzacite

Name in Other Languages:
German:Lulzacit
Spanish:Lulzacita

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Lulzacite

Reference List:
Moëlo, Y., Lasnier, B., Palvadeau, P., Leone, P. & Fontan, F. (2000): Lulzacite, Sr2Fe2+(Fe2+,Mg)2Al4(PO4)4(OH)10, a new strontium phosphate (Saint-Aubin-des-Chateaux, Loire-Atlantique, France). Comptes Rendu Académie des Sciences, Sér. IIa, 330: 317-324. (in French)

Leone, P., Palvadeau, P. & Moëlo, Y. (2000): Crystal structure of a new natural strontium, iron and aluminum hydroxyphosphate (lulzacite): Sr2Fe(Fe0.63Mg0.37)2Al4(PO4)4(OH)10. Comptes Rendus de l'Academie des Sciences, Série IIc, 3, 301-308. (in French)

Internet Links for Lulzacite

Localities for Lulzacite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
France
 
  • Pays de Loire
    • Loire-Atlantique
      • Saint-Aubin-des-Châteaux
Moëlo, Y., Lasnier, B., Palvadeau, P., Leone, P. & Fontan, F. (2000): Lulzacite, Sr2Fe2+(Fe2+,Mg)2Al4(PO4)4(OH)10, a new strontium phosphate (Saint-Aubin-des-Chateaux, Loire-Atlantique, France). Comptes Rendu Académie des Sciences, Sér. IIa, 330: 317-324. (in French); Moëlo, Y., Gloaguen, E., Lulzac, Y. (2006): III. Les minéraux de Saint-Aubin. Le Cahier des Micromonteurs, 1/2006, 13-25
Mineral and/or Locality  
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