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 % 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

Empirical Formula:

Sr₂Fe²⁺_2.2Mg_0.8Al₄(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 - PinacoidalH-M Symbol ( 1) Space Group: P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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

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:

PE_Lulzacite= 24.37 barns/electron
U=PE_Lulzacite x rElectron 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

Search for Lulzacite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Lulzacite :

A Bijoux Google Search for Lulzacite
Adam's Minerals Google Search for Lulzacite
Cape Minerals Google Search for Lulzacite
Dakota Matrix Minerals Google Search for Lulzacite
Excalibur Mineral Corp. Google Search for Lulzacite
Exceptional Minerals Google Search for Lulzacite
John Betts Fine Minerals Search for Lulzacite
McDougall Minerals Google Search for Lulzacite
Mineral News Website Link
Rock and Mineral Shows Google Search for Lulzacite
Weinrich Minerals, Inc. Google Search for Lulzacite

Ask about Lulzacite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Lulzacite Specimen Label here :

Lulzacite

Sr2Fe++(Fe++,Mg)2Al4(PO4)4(OH)10
Dana No: 41.07.04.01 Strunz No: 08.BK.25
Locality:

Notes: