Mineralogy Database

Lulzacite Mineral Data

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General Lulzacite Information

Help on Chemical  Formula: Chemical Formula: Sr2Fe++(Fe++,Mg)2Al4(PO4)4(OH)10
Help on Composition: Composition: Molecular Weight = 975.43 gm
   Strontium   17.97 %  Sr   21.25 % SrO
   Magnesium    1.99 %  Mg    3.31 % MgO
   Aluminum    11.06 %  Al   20.91 % Al2O3
   Iron        12.60 %  Fe   16.20 % FeO
   Phosphorus  12.70 %  P    29.10 % P2O5
   Hydrogen     1.03 %  H     9.23 % H2O
   Oxygen      42.65 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Sr2Fe2+2.2Mg0.8Al4(PO4)4(OH)10
Help on Environment: Environment: Quartz veinlets at the contact between Ordovician quartzite and limestone.
Help on IMA Status: IMA Status: Approved IMA 1998 (Dana # Added)
Help on Locality: Locality: In a quarry 8 km west of Chateaubriant, Loire-Atlanique region, France. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for mining geologist Y. Lulzac (1934-) of the BRGM who discovered the mineral.
Help on Synonym: Synonym: ICSD 89901

Lulzacite Image

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Comments: Dark gray siderite with grayish green lulzacite.
Location: St. Aubindes Chateaux, Loire, France. Scale: 1.7 x 1.4 cm.
© John Veevaert

Lulzacite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5976:1:1.0698
Help on Cell Dimensions: Cell Dimensions: a = 5.457, b = 9.131, c = 9.769, Z = 1; alpha = 108.47°, beta = 91.72°, gamma = 97.44° V = 457.60 Den(Calc)= 3.54
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.218(1)(122), 3.132(0.62)(120), 2.8119(0.58)(113), 3.016(0.56)(122), 3.591(0.5)(111), 4.473(0.47)(021), 3.47(0.45), 2.6526(0.44)(13

Physical Properties of Lulzacite

Help on Cleavage: Cleavage: None
Help on Color: Color: Grayish green, Dark yellow green.
Help on Density: Density: 3.55
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
Help on Hardness: Hardness: 5.5-6 - Knife Blade-Orthoclase
Help on Luster: Luster: Vitreous (Glassy)

Optical Properties of Lulzacite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.035 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.035 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1889,KPDmeas= 0.1889,KC= 0.1958
Ncalc = 1.7
Help on Optical Data: Optical Data: Biaxial (-), a=1.654, b=1.674, g=1.684, bire=0.0300, 2V(Calc)=68, 2V(Meas)=45-65. Dispersion r < v distinct.

Calculated Properties of Lulzacite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.44 gm/cc
note: Specific Gravity of Lulzacite =3.55 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PELulzacite = 24.37 barns/electron
U=PELulzacite x rElectron Density= 83.87 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lulzacite is Not Radioactive

Lulzacite Classification

Help on  Dana Class: Dana Class: (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.07)where (A B)m (XO4)4 Zq
  (41.07.04)Dana Group Lulzacite! Sr2Fe(Fe,Mg)2Al4(PO4)4(OH)10 P1 1
Help on  Strunz Class: Strunz Class: 08.BK.25 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BK -With medium-sized and large cations, (OH, etc.)
08.BK.25 Jamesite Pb2Zn2Fe5(AsO4)5O4 P1 1
08.BK.25 Lulzacite! Sr2Fe(Fe,Mg)2Al4(PO4)4(OH)10 P1 1

Other Lulzacite Information

Help on References: References: NAME( AmMin, Vol 86, p 1844) PHYS. PROP.(AmMin, Vol 86, p 1844) OPTIC PROP.(AmMin, Vol 86, p 1844)
Help on See Also: See Also: Links to other databases for Lulzacite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 08.BK.25





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