Graulichite-(Ce) Mineral Data

Graulichite-(Ce) Mineral Data
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General Graulichite-(Ce) Information

Help on Chemical Formula: Chemical Formula: CeFe+++3(AsO4)2(OH)6
Help on Composition: Composition: Molecular Weight = 680.93 gm
   Barium      3.63 %  Ba    4.05 % BaO
   Strontium   0.26 %  Sr    0.30 % SrO
   Lanthanum   2.04 %  La    2.39 % La2O3
   Cerium     13.79 %  Ce   16.15 % Ce2O3
   Aluminum    1.66 %  Al    3.14 % Al2O3
   Iron       21.98 %  Fe   31.43 % Fe2O3
   Arsenic    20.80 %  As   31.90 % As2O5
   Hydrogen    0.95 %  H     8.49 % H2O
   Sulfur      0.05 %  S     0.11 % S2O5
   Neodymium   1.91 %  Nd    2.22 % Nd2O3
   Oxygen     32.94 %  O
             ______        ______ 
             100.00 %      100.19 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ce0.67Ba0.18La0.1Nd0.09Sr0.02Fe3+2.68Al0.42As1.89S0.01O8(OH)5.62(H2O)0.4
Help on Environment: Environment: Formed from weathering arsenopyrite-bearing quartzite. Fe-dominant analogue of arsenoflorencite-(Ce).
Help on IMA Status: IMA Status: Approved IMA 2003 (Dana # Added)
Help on Locality: Locality: Hourt quarry, Stavelot Massif, Belgian Ardennes. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Jean-Marie Graulich (1920-2001), Belgian mining engineer and Honorary Driector of the Geological survey of Belgium.
Help on Synonym: Synonym: IMA2002-001
 

Graulichite-(Ce) Image

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Graulichite-(Ce)

Comments: Scanning electron microscope image of rhombohedral graulichite-(Ce) crystals on goethite.
Location: Hourt quarry, Stavelot Massif, Belgian Ardennes. Scale: See Image.
© University de Liege

Graulichite-(Ce) Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:2.30991
Help on Cell Dimensions: Cell Dimensions: a = 7.26, c = 16.77, Z = 3; V = 765.49 Den(Calc)= 4.43
Help on Crystal System: Crystal System: Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.052(1)(113), 3.636(0.4)(110), 1.817(0.35)(220),2.239(0.35)(107), 2.792(0.3)(006), 5.906(0.25),
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Hatert F , Lefevre P , Pasero M , Fransolet A-M , European Journal of Mineralogy , 15 (2003) p.733-739, Gaulichite-(Ce), a new arsenate mineral from the Stavelot Massif, Belgium, Locality: Stavelot Massif, Belgium

 

Physical Properties of Graulichite-(Ce)

Help on Cleavage: Cleavage: None
Help on Color: Color: Light green, Brownish green.
Help on Density: Density: 3.9
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Irregular - Flat surfaces (not cleavage) fractured in an irregular pattern.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Rhombohedral Crystals - Occurs as well-formed crystals showing rhobohedral crystals.
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Luster: Luster: Resinous
 

Optical Properties of Graulichite-(Ce)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.123 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.012 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.219,KPDmeas= 0.2487,KC= 0.2215
Ncalc = 1.86 - 1.98
Help on Optical Data: Optical Data: Uniaxial (-), w=1.97.
 

Calculated Properties of Graulichite-(Ce)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.13 gm/cc
note: Specific Gravity of Graulichite-(Ce) =4.43 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEGraulichite-(Ce) = 125.82 barns/electron
U=PEGraulichite-(Ce) x relectron= 519.06 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 17,614.43 (Gamma Ray American Petroleum Institute Units)
Concentration of Graulichite-(Ce) per GRapi unit = 56.77 (PPM)

Graulichite-(Ce) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Radioactivity from Graulichite-(Ce) - weak
Specimen
Size
Weight/Volume
(Sphere) *		 Calculated
Activity
Becquerels
(Bq)		 Calculated
Activity
Curies (Ci)		 Estimated
Activity
GR(api)		 Estimated
Exposure
(mRem**)/hr
If Held in Hand
For One Hour
1000 gm / 7.55 cm 397,220 1.07E-05 17,614.43 5.79
100 gm / 3.51 cm 39,722 1.07E-06 1,761.44 0.58
10 gm / 1.63 cm 3,972 1.07E-07 176.14 0.06
1 gm / 7.55 mm 397 1.07E-08 17.61 0.01
0.1 gm / 3.51 mm 40 1.07E-09 1.76 0.00
0.01 gm / 1.63 mm 4 1.07E-10 0.18 0.00
0.001 gm / 0.76 mm 0 1.07E-11 0.02 0.00

Weight of pure Graulichite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.43 gm/cc.*
Goverment Estimate of Average Annual Exposure ( 360 mRem) **
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem
Estimated Thorium Activity ( 0.89 % Th) From Sum REE Elements (17.73 % REE)
 

Graulichite-(Ce) Classification
Help on Dana Class: Dana Class: 41.05.11.04 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.05)where (A B)2 (XO4) Zq
  (41.05.11)Arsenoflorencite Group
 
41.05.11.01 Arsenoflorencite-(Ce) (Ce,La)Al3(AsO4)2(OH)6 R 3m 3 2/m
 
41.05.11.02 Arsenoflorencite-(Nd)* (Nd,La,Ce,Ba)(Al,Fe)3(AsO4,PO4)2(OH)6 R 3m 3m
 
41.05.11.03 Arsenoflorencite-(La)* (La,Sr)Al3(AsO4,SO4,PO4)2(OH)6 R 3m 3m
 
41.05.11.04 Graulichite-(Ce)! CeFe3(AsO4)2(OH)6 R 3m 3 2/m
Help on Strunz Class: Strunz Class: 08.BL.13 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BL -With medium-sized and large cations, (OH, etc.):RO4 = 3:1
 
08.BL.13 Arsenoflorencite-(Ce) (Ce,La)Al3(AsO4)2(OH)6 R 3m 3 2/m
 
08.BL.13 Eylettersite (Th,Pb)1-xAl3(PO4,SiO4)2(OH)6(?) R 3m 3 2/m
 
08.BL.13 Arsenoflorencite-(La)* (La,Sr)Al3(AsO4,SO4,PO4)2(OH)6 R 3m 3m
 
08.BL.13 Arsenoflorencite-(Nd)* (Nd,La,Ce,Ba)(Al,Fe)3(AsO4,PO4)2(OH)6 R 3m 3m
 
08.BL.13 Florencite-(Ce) CeAl3(PO4)2(OH)6 R 3m 3 2/m
 
08.BL.13 Florencite-(La) (La,Ce)Al3(PO4)2(OH)6 R 3m 3 2/m
 
08.BL.13 Florencite-(Nd) (Nd,Ce)Al3(PO4)2(OH)6 R 3m 3 2/m
 
08.BL.13 Graulichite-(Ce)! CeFe3(AsO4)2(OH)6 R 3m 3 2/m
 
08.BL.13 Waylandite BiAl3(PO4)2(OH)6 R 3m 3 2/m
 
08.BL.13 Zairite Bi(Fe,Al)3(PO4)2(OH)6 R 3m 3 2/m
 

Other Graulichite-(Ce) Information
Help on References: References: NAME( AmMin, 89:468) PHYS. PROP.(AmMin, 89:468) OPTIC PROP.(AmMin, 89:468)
Help on See Also: See Also: Links to other databases for Graulichite-(Ce) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (UofA)
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info

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Print or Cut-and-Paste your Graulichite-(Ce) Specimen Label here :

Graulichite-(Ce)

CeFe+++3(AsO4)2(OH)6
Dana No: 41.05.11.04 Strunz No: 08.BL.13
Locality:

 

Notes: