Orthojoaquinite-(Ce) Mineral Data

Orthojoaquinite-(Ce) Mineral Data +

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General Orthojoaquinite-(Ce) Information

Chemical Formula:

NaFe++Ba2Ce2Ti2[Si4O12]2 O2(OH)·(H2O)

Composition:

Molecular Weight = 1,388.16 gm

Barium 19.79 % Ba 22.09 % BaO

Sodium 1.66 % Na 2.23 % Na₂O

Cerium 20.19 % Ce 23.64 % Ce₂O₃

Titanium 6.90 % Ti 11.51 % TiO₂

Iron 4.02 % Fe 5.18 % FeO

Silicon 16.19 % Si 34.63 % SiO₂

Hydrogen 0.15 % H 1.30 % H₂O

Oxygen 31.12 % O

______ ______

100.00 % 100.58 % = TOTAL OXIDE

Empirical Formula:

NaFe²⁺Ba₂Ce₂Ti₂(Si₄O₁₂)₂O₂·(H₂O)

IMA Status:

Approved IMA 1982

Locality:

Dallas Gem mine, San Benito County, California, USA. Link to MinDat.org Location Data.

Name Origin:

Named after its orthorhombic crystal structure and the relationship to joaquinite (named for Joaquin Ridge, Diablo Range, California, USA).

Synonym:

IMA2000-D

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Orthojoaquinite-(Ce) Crystallography

Axial Ratios:

a:b:c =1.0848:1:2.3043

Cell Dimensions:

a = 10.48, b = 9.66, c = 22.26, Z = 4; V = 2,253.53 Den(Calc)= 4.09

Crystal System:

OrthorhombicSpace Group: Ccmm or Ccm21

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

By Intensity(I/I_o): 2.94(1), 4.43(0.9), 2.89(0.8),2.61(0.6), 3.29(0.6), 1.866(0.5), 2.98(0.4), 3.05(0.4),

Physical Properties of Orthojoaquinite-(Ce)

Cleavage:

[001] Good

Color:

Yellow, Light brown.

Density:

3.68

Diaphaniety:

Transparent

Hardness:

5.5 - Knife Blade

Luster:

Vitreous (Glassy)

Optical Properties of Orthojoaquinite-(Ce)

Gladstone-Dale:

CI meas= -0.056 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.05 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.188,KPDmeas= 0.209,KC= 0.198

Optical Data:

Biaxial (+), a=1.748-1.754, b=1.76-1.767, g=1.762-1.823, bire=0.0140-0.0690, 2V(Calc)=44-54, 2V(Meas)=40.

Pleochroism (x):

light yellow.

Pleochroism (y):

light yellow.

Pleochroism (z):

colorless.

Calculated Properties of Orthojoaquinite-(Ce)

Electron Density:

r_electron=3.77 gm/cc
note: r_{Orthojoaquinite-(Ce)}=4.09 gm/cc.

Fermion Index

Fermion Index = 0.05274
Boson Index = 0.94726

Photoelectric:

PE_{Orthojoaquinite-(Ce)}= 190.53 barns/electron
U=PE_{Orthojoaquinite-(Ce)} x r_electron= 717.44 barns/cc.

Radioactivity:

GRapi = 19,824.05 (Gamma Ray American Petroleum Institute Units)

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

**Estimated Radioactivity from Orthojoaquinite-(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 / 7.76 cm	452,191	1.22E-05	19,824.05	6.52
100 gm / 3.60 cm	45,219	1.22E-06	1,982.40	0.65
10 gm / 1.67 cm	4,522	1.22E-07	198.24	0.07
1 gm / 7.76 mm	452	1.22E-08	19.82	0.01
0.1 gm / 3.60 mm	45	1.22E-09	1.98	0.00
0.01 gm / 1.67 mm	5	1.22E-10	0.20	0.00
0.001 gm / 0.78 mm	0	1.22E-11	0.02	0.00

Weight of pure Orthojoaquinite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.09 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 ( 1.01 % Th) From Sum REE Elements (20.19 % REE)

Orthojoaquinite-(Ce) Classification

Dana Class:

60.1.1b.1 (60)Cyclosilicate Four-Membered Rings

(60.1)as Titanosilicates

(60.1.1b)Joaquinite group (Ortho-joaquinite subgroup)

60.1.1b.1 Orthojoaquinite-(Ce) NaFeBa2Ce2Ti2[Si4O12]2O2(OH)·(H2O) Ccmm or Ccm21 Ortho

60.1.1b.2 Strontio-orthojoaquinite (Na,Fe)2Ba2Sr2Ti2[Si4O12]2(O,OH)2·(H2O) Pbcm or Pbc2 Ortho

60.1.1b.3 Bario-orthojoaquinite Fe2(Ba,Sr)4Ti2[Si4O12]O2·(H2O) Ccmm or Ccm2 Ortho

60.1.1b.4 Byelorussite-(Ce) NaBa2(Ce,La)2MnTi2Si8O26(F,OH)·(H2O) P 2₁2₁2₁ 2 2 2

60.1.1b.5 Orthojoaquinite-(La)! Ba2Na(La,Ce)2FeTi2Si8O26(OH,O,F)·H2O Ccmm 2/m 2/m 2/m

Strunz Class:

VIII/E.08-90 VIII - Silicates

VIII/E - Cyklosilicates, quadruplet rings [Si4O11]8-

VIII/E.08 - Joaquinite group, Baotite - Orthojoaquinite-(Ce) series

VIII/E.08-05 Verplanckite Ba2(Mn,Ti,Fe)2Si2O6(O,OH,Cl,F)2·3(H2O) P 6/mmm 6/m 2/m 2/m

VIII/E.08-10 Baotite Ba4(Ti,Nb)8Si4O28Cl I 4₁/a 4/m

VIII/E.08-15 Cerchiaraite! Ba4(Mn,Fe,Al)4Si6(O,OH,Cl)26 I 4/mmm 4/m 2/m 2/m

VIII/E.08-20 Titantaramellite Ba4(Ti,Fe,Fe,Mg)4(B2Si8O27)O2ClxX=0TO1,withTi>Fe Pmmn 2/m 2/m 2/m

VIII/E.08-30 Taramellite Ba4(Fe,Ti,Fe,Mg)4(B2Si8O27)O2Clx(x=0to1) Pmmn 2/m 2/m 2/m

VIII/E.08-40 Nagashimalite Ba4(V,Ti)4Si8B2O27Cl(O,OH)2 Pmmn 2/m 2/m 2/m

VIII/E.08-50 Strontiojoaquinite (Na,Fe)2Ba2Sr2Ti2[Si4O12]2(O,OH)2·(H2O) C 2 2

VIII/E.08-60 Strontio-orthojoaquinite (Na,Fe)2Ba2Sr2Ti2[Si4O12]2(O,OH)2·(H2O) Pbcm or Pbc2 Ortho

VIII/E.08-70 Bario-orthojoaquinite Fe2(Ba,Sr)4Ti2[Si4O12]O2·(H2O) Ccmm or Ccm2 Ortho

VIII/E.08-80 Joaquinite-(Ce) NaFeBa2Ce2(Ti,Nb)2[Si4O12]2O2(OH,F)·(H2O) C 2 2

VIII/E.08-89 Orthojoaquinite-(La)! Ba2Na(La,Ce)2FeTi2Si8O26(OH,O,F)·H2O Ccmm 2/m 2/m 2/m

VIII/E.08-90 Orthojoaquinite-(Ce) NaFeBa2Ce2Ti2[Si4O12]2O2(OH)·(H2O) Ccmm or Ccm21 Ortho

Other Orthojoaquinite-(Ce) Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Orthojoaquinite-(Ce) :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas

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Orthojoaquinite-(Ce)

NaFe++Ba2Ce2Ti2[Si4O12]2 O2(OH)·(H2O)
Dana No: 60.1.1b.1 Strunz No: VIII/E.08-90
Locality:

Notes: