Lulzacite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Lulzacite
Yves Lulzac, discoverer of the Nenez uranium deposit
Nenez, Belle-Isle-en-Terre, Guingamp, Côtes-d'Armor, Brittany, France
Nenez, Belle-Isle-en-Terre, Guingamp, Côtes-d'Armor, Brittany, France
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.
Type Locality:
Unique Identifiers
Mindat ID:
7058
Long-form identifier:
mindat:1:1:7058:0
IMA Classification of Lulzacite
Classification of Lulzacite
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
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 Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Lul | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Lulzacite
Vitreous
Colour:
Greyish-green
Hardness:
5½ - 6 on Mohs scale
Cleavage:
None Observed
None
None
Density:
3.55 g/cm3 (Measured) 3.58 g/cm3 (Calculated)
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
Based on recorded range of RI values above.
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. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
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. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Dispersion:
r < v distinct
Pleochroism:
Visible
Comments:
brown-yellow to pale blue-violet
Chemistry of Lulzacite
Mindat Formula:
Sr2Fe2+(Fe2+,Mg)2Al4(PO4)4(OH)10
Element Weights:
Crystallography of Lulzacite
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°
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 Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0018779 | Lulzacite | Leone 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 3 301-308 | 2000 | Saint-Aubin-des-Chateaux, Loire-Atlantique, France | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 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 Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) |
Type Occurrence of Lulzacite
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.
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 Lulzacite
Other Language Names for Lulzacite
Common Associates
Associations Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 8.BK.05 | Brazilianite | NaAl3(PO4)2(OH)4 |
| 8.BK.10 | Neustädtelite | Bi2Fe3+(Fe3+,Co)(AsO4)2(O,OH)4 |
| 8.BK.10 | Cobaltneustädtelite | Bi2Fe3+(Co,Fe3+)(AsO4)2(O,OH)4 |
| 8.BK.10 | Medenbachite | Bi2Fe3+Cu2+(AsO4)2O(OH)3 |
| 8.BK.15 | Curetonite | Ba(Al,Ti)(PO4)(OH,O)F |
| 8.BK.20 | Heyite | Pb5Fe2+2(VO4)2O4 |
| 8.BK.25 | Jamesite | Pb2Zn(Fe2+,Zn)2Fe3+4(AsO4)4(OH)10 |
| 8.BK.25 | Désorite | Pb2(Fe3+6Zn)O2(PO4)4(OH)8 |
| 8.BK.30 | Nishanbaevite | KAl2O(AsO4)(SO4) |
| 8.BK.35 | Zircarsite | Na18Cu12ZrO8(AsO4)8Cl6 |
| 8.BK.35 | Arsmirandite | Na18Cu12Fe3+O8(AsO4)8Cl5 |
| 8.BK.35 | Lebedevite | K4Na14Cu14O8(AsO4)8Cl6 |
| 8.BK.35 | Lehmannite | Na18Cu12TiO8(AsO4)8FCl5 |
Other Information
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 Lulzacite
mindat.org URL:
https://www.mindat.org/min-7058.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Lulzacite
Reference List:
Moëlo, Yves, Lasnier, Bernard, Palvadeau, Pierre, Léone, Philippe, Fontan, François (2000) La lulzacite, Sr2Fe2+(Fe2+,Mg)2Al4(PO4)4(OH)10, un nouveau phosphate de strontium (Saint-Aubin-des-Châteaux, Loire-Atlantique, France) Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science, 330 (5) 317-324 doi:10.1016/s1251-8050(00)00152-x
Leone, Philippe, Palvadeau, Pierre, Moëlo, Yves (2000) Structure cristalline d'un nouvel hydroxyphosphate naturel de strontium, fer et aluminium (lulzacite), Sr2Fe(Fe0,63Mg0,37)2Al4(PO4)4(OH)10. Comptes Rendus de l'Académie des Sciences - Series IIC - Chemistry, 3 (4) 301-308 doi:10.1016/s1387-1609(00)00117-1
Frost, Ray L., López, Andrés, Belotti, Fernanda M., Xi, Yunfei, Scholz, Ricardo (2014) A vibrational spectroscopic study of the phosphate mineral lulzacite Sr2Fe2+(Fe2+,Mg)2Al4(PO4)4(OH)10. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 127. 243-247 doi:10.1016/j.saa.2014.02.041
Localities for Lulzacite
Showing 1 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
France (TL) | |
| Moëlo et al. (2000) +1 other reference |
Quick NavTopAbout LulzaciteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Bois-de-la-Roche quarry, Saint-Aubin-des-Châteaux, Châteaubriant-Ancenis, Loire-Atlantique, Pays de la Loire, France