Article · Wikipedia archive · Last revised Jun 22, 2026

Lulzacite

Lulzacite is a strontium-containing phosphate mineral with the chemical formula Sr2Fe2+(Fe2+,Mg)2Al4(PO4)4(OH)10.

Last revised
Jun 22, 2026
Read time
≈ 1 min
Length
206 w
Citations
9
Source
Wikipedia ↗
Lulzacite
Lulzacite found in France
General
CategoryPhosphate minerals
FormulaSr2Fe2+(Fe2+,Mg)2Al4(PO4)4(OH)10
IMA symbolLul1
Strunz classification8.BK.25
Crystal systemTriclinic
Crystal classPinacoidal (1)
(same H-M symbol)
Space groupP1
Identification
ColorGrayish-green to yellowish-green
Crystal habitAnhedral aggregates; rarely small euhedral crystals
CleavageNone
Mohs scale hardness5.5–6
LusterVitreous
DiaphaneityTransparent–translucent
Specific gravity3.55
Optical propertiesBiaxial (−)
Refractive indexnα = 1.654
nβ = 1.674
nγ = 1.684
Birefringenceδ = 0.030
References234

Lulzacite is a strontium-containing phosphate mineral with the chemical formula Sr2Fe2+(Fe2+,Mg)2Al4(PO4)4(OH)10.23

The mineral was first described in 2000 from quartzite deposits (47°42′50″N 1°29′20″W / 47.71389°N 1.48889°W / 47.71389; -1.48889) at Saint-Aubin-des-Châteaux, Loire-Atlantique, France, and is named after Y. Lulzac, a French geologist who discovered the mineral. In this deposit, lulzacite occurs within quartz and siderite veinlets at quartzite–limestone contacts. Other minerals found in the veinlets include apatite, goyazite, and pyrite.4

Lulzacite crystallizes in the triclinic system with P1 space group. It is isostructural with jamesite (Pb2Zn(Fe2+,Zn)2Fe3+4(AsO4)4(OH)10).45

References

References

  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. "Lulzacite Mineral Data". webmineral.com. David Barthelmy. Retrieved September 4, 2010.
  3. "Lulzacite". mindat.org. Jolyon Ralph and Ida Chau. Retrieved September 4, 2010.
  4. Moëlo, Yves; Bernard Lasnier; Pierre Palvadeau; Philippe Léone; François Fontan (15 March 2000). "Lulzacite, Sr2Fe2+(Fe2+,Mg)2Al4(PO4)4(OH)10, a new strontium phosphate (Saint-Aubin-des-Châteaux, Loire-Atlantique, France)". Comptes Rendus de l'Académie des Sciences, Série IIA. 330 (5): 317–324. Bibcode:2000CRASE.330..317M. doi:10.1016/S1251-8050(00)00152-X.
  5. "Jamesite". mindat.org. Jolyon Ralph and Ida Chau. Retrieved September 4, 2010.