Bario-orthojoaquinite Mineral Data
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 % H2 O
Oxygen 32.82 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Fe2+ 2 Ba2 Sr2 Ti2 (Si4 O12 )2 O2 •(H2 O)
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 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:
Orthorhombic Space Group: Ccmm or Ccm2
X Ray Diffraction:
By Intensity(I/Io ): 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:
PEBario-orthojoaquinite = 109.31 barns/electronU=PEBario-orthojoaquinite x r Electron 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 21 21 21 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 21 21 21 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:
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