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Joaquinite-(Ce) Mineral Data

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General Joaquinite-(Ce) Information

Help on Chemical  Formula: Chemical Formula: NaFe++Ba2Ce2(Ti,Nb)2[Si4O12]2O2(OH,F)•(H2O)
Help on Composition: Composition: Molecular Weight = 1,419.19 gm
   Barium    19.35 %  Ba   21.61 % BaO
   Sodium     1.62 %  Na    2.18 % Na2O
   Cerium    19.75 %  Ce   23.13 % Ce2O3
   Titanium   3.37 %  Ti    5.63 % TiO2
   Niobium    6.55 %  Nb    9.36 % Nb2O5
   Iron       3.94 %  Fe    5.06 % FeO
   Silicon   15.83 %  Si   33.87 % SiO2
   Hydrogen   0.18 %  H     1.59 % H2O
   Oxygen    28.75 %  O
   Fluorine   0.67 %  F     0.67 % F
               -   %   F    -0.28 % -O=F2    
            ______        ______ 
            100.00 %      102.82 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NaFe2+Ba2Ce2TiNb(Si4O12)2(OH)0.5F0.5•(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1909
Help on Locality: Locality: Benitoite Gem mine, head waters of the San Benito River, Joaquin Ridge, Diablo Range, 1 mile south of Santa Rita Peak, San Benito Co. California. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its locality.
Help on Name Pronunciation: Name Pronunciation: Joaquinite-(Ce) + Pronunciation Say JOAQUINITE-(CE)
Help on Synonym: Synonym: ICSD 4359
  IMA2000-D
  PDF 36-385
 

Joaquinite-(Ce) Image

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  Joaquinite-(Ce)

Comments: Brown crystal of joaquinite-(Ce).
Location: Benitoite Gem mine, San Benito County, California, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Joaquinite-(Ce) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0856:1:1.2216
Help on Cell Dimensions: Cell Dimensions: a = 10.516, b = 9.686, c = 11.833, Z = 2; beta = 109.67° V = 1,134.95 Den(Calc)= 4.15
Help on Crystal System: Crystal System: Monoclinic - Sphenoidal H-M Symbol (2) Space Group: C 2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.8(1), 5.58(0.7), 2.95(0.18),
 

Physical Properties of Joaquinite-(Ce)

Help on Cleavage: Cleavage: {???} Good
Help on Color: Color: Brown, Honey yellow, Orange.
Help on Density: Density: 3.62 - 3.98, Average = 3.8
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Hardness: Hardness: 5-5.5 - Apatite-Knife Blade
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
 

Optical Properties of Joaquinite-(Ce)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.022 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.064 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1853,KPDmeas= 0.2024,KC= 0.198
Ncalc = 1.72 - 1.82
Help on Optical Data: Optical Data: Biaxial (+), a=1.748-1.754, b=1.76-1.767, g=1.762-1.823, bire=0.0140-0.0690
Help on Pleochroism (x): Pleochroism (x): light yellow.
Help on Pleochroism (y): Pleochroism (y): light yellow.
Help on Pleochroism (z): Pleochroism (z): colorless.
 

Calculated Properties of Joaquinite-(Ce)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.49 gm/cc
note: Specific Gravity of Joaquinite-(Ce) =3.80 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEJoaquinite-(Ce) = 196.52 barns/electron
U=PEJoaquinite-(Ce) x relectron= 685.10 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 19,322.82 (Gamma Ray American Petroleum Institute Units)
Concentration of Joaquinite-(Ce) per GRapi unit = 51.75 (PPM)

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

Estimated Radioactivity from Joaquinite-(Ce) - weak
Specimen
Size
Weight/Volume
(Sphere)
*
Calculated
Activity
Bequerols
(Bq)
Calculated
Activity
Curies (Ci)
Estimated
Activity
GR(api)
Estimated
Exposure
(mRem**)/hr
If Held in Hand
For One Hour
1000 gm / 7.95 cm 442,304 1.20E-05 19,322.82 6.35
100 gm / 3.69 cm 44,230 1.20E-06 1,932.28 0.64
10 gm / 1.71 cm 4,423 1.20E-07 193.23 0.06
1 gm / 7.95 mm 442 1.20E-08 19.32 0.01
0.1 gm / 3.69 mm 44 1.20E-09 1.93 0.00
0.01 gm / 1.71 mm 4 1.20E-10 0.19 0.00
0.001 gm / 0.80 mm 0 1.20E-11 0.02 0.00

Weight of pure Joaquinite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.80 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 ( 0.99 % Th) From Sum REE Elements (19.75 % REE)
 

Joaquinite-(Ce) Classification

Help on  Dana Class: Dana Class: 60.01.01a.01 (60)Cyclosilicate Four-Membered Rings
  (60.01)as Titanosilicates
  (60.01.01a)Joaquinite group (Clino-joaquinite subgroup)
 
60.01.01a.01 Joaquinite-(Ce) NaFeBa2Ce2(Ti,Nb)2[Si4O12]2O2(OH,F)•(H2O) C 2 2
 
60.01.01a.02 Strontiojoaquinite (Na,Fe)2Ba2Sr2Ti2[Si4O12]2(O,OH)2•(H2O) C 2 2
Help on  Strunz Class: Strunz Class: 09.CE.25 09 - SILICATES (Germanates)
  09.C - Cyclosilicates
  09.CE -[Si4O12]8- 4-membered single rings (vierer-Einfachringe),
 
09.CE.25 Byelorussite-(Ce) NaBa2(Ce,La)2MnTi2Si8O26(F,OH)•(H2O) P 212121 2 2 2
 
09.CE.25 Bario-orthojoaquinite Fe2(Ba,Sr)4Ti2[Si4O12]O2•(H2O) Ccmm or Ccm2 Ortho
 
09.CE.25 Joaquinite-(Ce) NaFeBa2Ce2(Ti,Nb)2[Si4O12]2O2(OH,F)•(H2O) C 2 2
 
09.CE.25 Orthojoaquinite-(Ce) NaFeBa2Ce2Ti2[Si4O12]2O2(OH)•(H2O) Ccmm or Ccm21 Ortho
 
09.CE.25 Strontio-orthojoaquinite (Na,Fe)2Ba2Sr2Ti2[Si4O12]2(O,OH)2•(H2O) Pbcm or Pbc2 Ortho
 
09.CE.25 Strontiojoaquinite (Na,Fe)2Ba2Sr2Ti2[Si4O12]2(O,OH)2•(H2O) C 2 2
 
09.CE.25 Orthojoaquinite-(La)! Ba2Na(La,Ce)2FeTi2Si8O26(OH,O,F)•H2O Ccmm 2/m 2/m 2/m
 

Other Joaquinite-(Ce) Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Joaquinite-(Ce) :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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

Joaquinite-(Ce)

NaFe++Ba2Ce2(Ti,Nb)2[Si4O12]2O2(OH,F)•(H2O)
Dana No: 60.01.01a.01 Strunz No: 09.CE.25
Locality:

 

Notes:

 

 
   
 


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