| Lulzacite | |
|---|---|
 Lulzacite found in France | |
| General | |
| Category | Phosphate minerals |
|
Formula (repeating unit) | Sr2Fe2+(Fe2+,Mg)2Al4(PO4)4(OH)10 |
| IMA symbol | Lul [1] |
| Strunz classification | 8.BK.25 |
| Crystal system | Triclinic |
| Crystal class | Pinacoidal (1) (same H-M symbol) |
| Space group | P1 |
| Identification | |
| Color | Grayish-green to yellowish-green |
| Crystal habit | Anhedral aggregates; rarely small euhedral crystals |
| Cleavage | None |
| Mohs scale hardness | 5.5–6 |
| Luster | Vitreous |
| Diaphaneity | Transparent–translucent |
| Specific gravity | 3.55 |
| Optical properties | Biaxial (−) |
| Refractive index | nα = 1.654 nβ = 1.674 nγ = 1.684 |
| Birefringence | δ = 0.030 |
| References | [2] [3] [4] |
Lulzacite is a strontium-containing phosphate mineral with the chemical formula Sr2Fe2+(Fe2+,Mg)2Al4(PO4)4(OH)10. [2] [3]
The mineral was first described in 2000 from quartzite deposits ( 47°42′50″N 1°29′20″W / 47.71389°N 1.48889°W) 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). [4] [5]
References
- ^ 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.
- ^ a b "Lulzacite Mineral Data". webmineral.com. David Barthelmy. Retrieved September 4, 2010.
- ^ a b "Lulzacite". mindat.org. Jolyon Ralph and Ida Chau. Retrieved September 4, 2010.
- ^ a b c 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.
- ^ "Jamesite". mindat.org. Jolyon Ralph and Ida Chau. Retrieved September 4, 2010.
 | This article about a specific phosphate mineral is a stub. You can help Wikipedia by expanding it. |