Orthojoaquinite-(La) Mineral Data

Orthojoaquinite-(La) Mineral Data +

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General Orthojoaquinite-(La) Information

Chemical Formula:

Ba2Na(La,Ce)2Fe++Ti2Si8O26(OH,O,F)·H2O

Composition:

Molecular Weight = 1,429.39 gm

Potassium 0.27 % K 0.33 % K₂O

Barium 19.21 % Ba 21.45 % BaO

Sodium 1.77 % Na 2.38 % Na₂O

Lanthanum 8.75 % La 10.26 % La₂O₃

Cerium 7.84 % Ce 9.19 % Ce₂O₃

Praeseodymium 0.99 % Pr 1.15 % Pr₂O₃

Titanium 5.36 % Ti 8.94 % TiO₂

Manganese 0.38 % Mn 0.50 % MnO

Niobium 1.95 % Nb 2.79 % Nb₂O₅

Iron 4.30 % Fe 5.03 % FeO / 0.56 % Fe₂O₃

Silicon 15.72 % Si 33.63 % SiO₂

Hydrogen 0.17 % H 1.51 % H₂O

Neodymium 2.02 % Nd 2.35 % Nd₂O₃

Oxygen 31.01 % O

Fluorine 0.27 % F 0.27 % F

- % F -0.11 % -O=F₂

______ ______

100.00 % 100.22 % = TOTAL OXIDE

Empirical Formula:

Ba₂Na_1.1K_0.1La_0.9Ce_0.8Nd_0.2Pr_0.1Fe²⁺Mn²⁺_0.1Ti_1.6Nb_0.3Fe³⁺_0.1Si₈O_26.3(OH)_0.4 ·(H₂O)F_0.2

Environment:

Occurs in a nepheline-sodalite syenite pegmatites. Joaquinite group

IMA Status:

Approved IMA 2000 (Dana # Added)

Locality:

Ilimaussaq alkaline complex, southern Greenland. Link to MinDat.org Location Data.

Name Origin:

Named as the La analog of orthojoaquinite.

Synonym:

IMA2000-D

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Orthojoaquinite-(La) Crystallography

Axial Ratios:

a:b:c =1.0887:1:2.3083

Cell Dimensions:

a = 10.539, b = 9.68, c = 22.345, Z = 4; V = 2,279.58 Den(Calc)= 4.16

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Ccmm

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

By Intensity(I/I_o): 2.8(1)(313,008,225), 5.58(0.67)(004), 2.95(0.17)(206),1.596(0.13)(0.0.14,602), 2.91(0.105)(117), 3(0.088)(224), 2.232(0.08)(0.0.10),

Physical Properties of Orthojoaquinite-(La)

Cleavage:

[001] Good

Color:

Brown.

Density:

4.1

Diaphaniety:

Transparent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Hardness:

5 - Apatite

Luster:

Silky

Optical Properties of Orthojoaquinite-(La)

Gladstone-Dale:

CI meas= -0.008 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.007 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1852,KPDmeas= 0.1879,KC= 0.1865

Optical Data:

Biaxial (+), a=1.754, b=1.76, g=1.797, bire=0.0430

Calculated Properties of Orthojoaquinite-(La)

Electron Density:

r_electron=3.83 gm/cc
note: r_{Orthojoaquinite-(La)}=4.16 gm/cc.

Fermion Index

Fermion Index = 0.05378
Boson Index = 0.94622

Photoelectric:

PE_{Orthojoaquinite-(La)}= 186.72 barns/electron
U=PE_{Orthojoaquinite-(La)} x r_electron= 715.12 barns/cc.

Radioactivity:

GRapi = 19,243.92 (Gamma Ray American Petroleum Institute Units)

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

**Estimated Radioactivity from Orthojoaquinite-(La)** - 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 / 7.71 cm	438,943	1.19E-05	19,243.92	6.33
100 gm / 3.58 cm	43,894	1.19E-06	1,924.39	0.63
10 gm / 1.66 cm	4,389	1.19E-07	192.44	0.06
1 gm / 7.71 mm	439	1.19E-08	19.24	0.01
0.1 gm / 3.58 mm	44	1.19E-09	1.92	0.00
0.01 gm / 1.66 mm	4	1.19E-10	0.19	0.00
0.001 gm / 0.77 mm	0	1.19E-11	0.02	0.00

Weight of pure Orthojoaquinite-(La) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.16 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 ( 0.98 % Th) From Sum REE Elements (19.59 % REE)

Orthojoaquinite-(La) Classification

Dana Class:

60.1.1b.5 (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.08-89 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-(La) Information

References:

NAME( AmMin, Vol 86, p356) PHYS. PROP.(MinRec, Vol 33, p 166) OPTIC PROP.(MinRec, Vol 33, p 166)

See Also:

Links to other databases for Orthojoaquinite-(La) :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Orthojoaquinite-(La)

Ba2Na(La,Ce)2Fe++Ti2Si8O26(OH,O,F)·H2O
Dana No: 60.1.1b.5 Strunz No: VIII/E.08-89
Locality:

Notes: