Lulzacite Mineral Data
General Lulzacite Information
Chemical Formula:
Sr2Fe++(Fe++,Mg)2Al4(PO4)4(OH)10
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 % Al2 O3
Iron 12.60 % Fe 16.20 % FeO
Phosphorus 12.70 % P 29.10 % P2 O5
Hydrogen 1.03 % H 9.23 % H2 O
Oxygen 42.65 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Sr2 Fe2+ 2.2 Mg0.8 Al4 (PO4 )4 (OH)10
Environment:
Quartz veinlets at the contact between Ordovician quartzite and limestone.
IMA Status:
Approved IMA 1998 (Dana # Added)
Locality:
In a quarry 8 km west of Chateaubriant, Loire-Atlanique region, France. Link to MinDat.org Location Data.
Name Origin:
Named for mining geologist Y. Lulzac (1934-) of the BRGM who discovered the mineral.
Synonym:
ICSD 89901
IMA1998-039
Lulzacite Image
Images:
Lulzacite
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
Axial Ratios:
a:b:c =0.5976:1:1.0698
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
Crystal System:
Triclinic - Pinacoidal H-M Symbol ( 1 ) Space Group: P1
X Ray Diffraction:
By Intensity(I/Io ): 3.218(1)(12 2), 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
Cleavage:
None
Color:
Grayish green, Dark yellow green.
Density:
3.55
Diaphaneity:
Transparent to Translucent
Habit:
Anhedral Grains - Granular minerals without the expression of crystal shapes
Hardness:
5.5-6 - Knife Blade-Orthoclase
Luster:
Vitreous (Glassy)
Optical Properties of Lulzacite
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
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
Electron Density:
Bulk Density (Electron Density)=3.44 gm/cc note: Specific Gravity of Lulzacite =3.55 gm/cc.
Fermion Index:
Fermion Index = 0.01 Boson Index = 0.99
Photoelectric:
PELulzacite = 24.37 barns/electronU=PELulzacite x r Electron Density= 83.87 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Lulzacite is Not Radioactive
Lulzacite Classification
Dana Class:
41.07.04.01 (41) Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
(41.07) where (A B)m (XO4)4 Zq
(41.07.04) Dana Group
41.07.04.01 Lulzacite ! Sr2Fe(Fe,Mg)2Al4(PO4)4(OH)10 P1 1
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
References:
NAME( AmMin, Vol 86, p 1844) PHYS. PROP.(AmMin, Vol 86, p 1844) OPTIC PROP.(AmMin, Vol 86, p 1844)
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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Lulzacite
Sr2Fe++(Fe++,Mg)2Al4(PO4)4(OH)10
Dana No: 41.07.04.01 Strunz No: 08.BK.25
Locality:
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