Lulzacite is a strontium-containing

phosphate mineral Phosphate minerals contain the tetrahedrally coordinated phosphate (PO43−) anion along sometimes with arsenate (AsO43−) and vanadate (VO43−) substitutions, and chloride (Cl−), fluoride (F−), and hydroxide (OH−) anions that also fit ...

with the chemical formula Sr₂Fe²⁺(Fe²⁺,Mg)₂Al₄(PO₄)₄(OH)₁₀. The mineral was first described in 2000 from

quartzite Quartzite is a hard, non- foliated metamorphic rock which was originally pure quartz sandstone.Essentials of Geology, 3rd Edition, Stephen Marshak, p 182 Sandstone is converted into quartzite through heating and pressure usually related to tec ...

deposits () at

Saint-Aubin-des-Châteaux Saint-Aubin-des-Châteaux (; br, Sant-Albin-ar-C'hestell) is a commune in the Loire-Atlantique department in western France. Geography The village is located in the northwestern part of the commune on the right bank of the river Chère, which ...

, Loire-Atlantique, France, and is named after Y. Lulzac, a French geologist who discovered the mineral. In this deposit, lulzacite occurs within

quartz Quartz is a hard, crystalline mineral composed of silica ( silicon dioxide). The atoms are linked in a continuous framework of SiO4 silicon-oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical ...

and

siderite Siderite is a mineral composed of iron(II) carbonate (FeCO3). It takes its name from the Greek word σίδηρος ''sideros,'' "iron". It is a valuable iron mineral, since it is 48% iron and contains no sulfur or phosphorus. Zinc, magnesium and ...

veinlets at quartzite–

limestone Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms whe ...

contacts. Other minerals found in the veinlets include apatite, goyazite, and

pyrite The mineral pyrite (), or iron pyrite, also known as fool's gold, is an iron sulfide with the chemical formula Fe S2 (iron (II) disulfide). Pyrite is the most abundant sulfide mineral. Pyrite's metallic luster and pale brass-yellow hue giv ...

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

References

Phosphate minerals Strontium minerals Iron(II) minerals Magnesium minerals Aluminium minerals Triclinic minerals Minerals in space group 2 {{phosphate-mineral-stub