Bario-orthojoaquinite Mineral Data

Lapis Mineral Journal

General Bario-orthojoaquinite Information

Chemical Formula:

Fe++2(Ba,Sr)4Ti2[Si4O12]O2•(H2O)

Composition:

Molecular Weight = 1,316.03 gm

Barium 20.87 % Ba 23.30 % BaO

Strontium 13.32 % Sr 15.75 % SrO

Titanium 7.28 % Ti 12.14 % TiO₂

Iron 8.49 % Fe 10.92 % FeO

Silicon 17.07 % Si 36.52 % SiO₂

Hydrogen 0.15 % H 1.37 % H₂O

Oxygen 32.82 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe²⁺₂Ba₂Sr₂Ti₂(Si₄O₁₂)₂O₂•(H₂O)

IMA Status:

Approved IMA 1980

Locality:

Benitoite Gem mine, head waters of the San Bent river, 1 mile south of Santa Rita Peak, San Benito Co. California. Link to MinDat.org Location Data.

Name Origin:

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

Synonym:

IMA2000-D

Bario-orthojoaquinite Image

Images:

Bario-orthojoaquinite

Comments: Several 0.75mm brownish red micro-crystals of bario-orthojoaquinite in matrix.
Location: Dallas Gem mine, San Benito Co., California, USA. Scale: Picture size 0.5 cm.
© Tom Loomis / Dakota Matrix

Bario-orthojoaquinite Crystallography

Axial Ratios:

a:b:c =1.0914:1:2.3533

Cell Dimensions:

a = 10.477, b = 9.599, c = 22.59, Z = 4; V = 2,271.85 Den(Calc)= 3.85

Crystal System:

OrthorhombicSpace Group: Ccmm or Ccm2

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

By Intensity(I/I_o): 2.997(1), 2.953(0.95), 2.824(0.9),

Physical Properties of Bario-orthojoaquinite

Cleavage:

{001} Good

Color:

Yellow, Yellowish brown.

Density:

3.96

Diaphaneity:

Transparent

Hardness:

5-5.5 - Apatite-Knife Blade

Luster:

Vitreous (Glassy)

Optical Properties of Bario-orthojoaquinite

Gladstone-Dale:

CI meas= 0.051 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.024 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1967,KPDmeas= 0.1912,KC= 0.2015
Ncalc = 1.78 - 1.8

Optical Data:

Biaxial (+), a=1.735, b=1.737, g=1.8, bire=0.0650, 2V(Calc)=22, 2V(Meas)=10-15.

Pleochroism (x):

yellow.

Pleochroism (y):

pale yellow.

Pleochroism (z):

very pale yellow.

Calculated Properties of Bario-orthojoaquinite

Electron Density:

Bulk Density (Electron Density)=3.59 gm/cc
note: Specific Gravity of Bario-orthojoaquinite =3.85 gm/cc.

Fermion Index:

Fermion Index = 0.06
Boson Index = 0.94

Photoelectric:

PE_{Bario-orthojoaquinite}= 109.31 barns/electron
U=PE_{Bario-orthojoaquinite} x rElectron Density= 392.68 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bario-orthojoaquinite is Not Radioactive

Bario-orthojoaquinite Classification

Dana Class:

60.01.01b.03 (60)Cyclosilicate Four-Membered Rings

(60.01)as Titanosilicates

(60.01.01b)Joaquinite group (Ortho-joaquinite subgroup)

60.01.01b.01 Orthojoaquinite-(Ce) NaFeBa2Ce2Ti2[Si4O12]2O2(OH)•(H2O) Ccmm or Ccm21 Ortho

60.01.01b.02 Strontio-orthojoaquinite (Na,Fe)2Ba2Sr2Ti2[Si4O12]2(O,OH)2•(H2O) Pbcm or Pbc2 Ortho

60.01.01b.03 Bario-orthojoaquinite Fe2(Ba,Sr)4Ti2[Si4O12]O2•(H2O) Ccmm or Ccm2 Ortho

60.01.01b.04 Byelorussite-(Ce) NaBa2(Ce,La)2MnTi2Si8O26(F,OH)•(H2O) P 2₁2₁2₁ 2 2 2

60.01.01b.05 Orthojoaquinite-(La)! Ba2Na(La,Ce)2FeTi2Si8O26(OH,O,F)•H2O Ccmm 2/m 2/m 2/m

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 Bario-orthojoaquinite Information

References:

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

See Also:

Links to other databases for Bario-orthojoaquinite :
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

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Bario-orthojoaquinite

Fe++2(Ba,Sr)4Ti2[Si4O12]O2•(H2O)
Dana No: 60.01.01b.03 Strunz No: 09.CE.25
Locality:

Notes: