Titantaramellite Mineral Data (original) (raw)
General Titantaramellite Information
Chemical Formula:
Ba4(Ti,Fe+++,Fe++,Mg)4(B2Si8O27)O2Clx X=0 TO 1, with Ti > Fe
Composition:
Molecular Weight = 1,442.84 gm
Barium 37.12 % Ba 41.44 % BaO
Magnesium 0.34 % Mg 0.56 % MgO
Titanium 6.31 % Ti 10.52 % TiO2
Iron 5.42 % Fe 4.98 % FeO / 2.21 % Fe2O3
Silicon 15.57 % Si 33.31 % SiO2
Boron 1.12 % B 3.62 % B2O3
Chlorine 1.97 % Cl 1.97 % Cl
Oxygen 32.16 % O
______ ______
100.00 % 98.17 % = TOTAL OXIDE
Empirical Formula:
Ba3.9Ti1.9Fe2+Fe3+0.4Mg0.2B1.5Si8O29Cl0.8
Environment:
Ba silicates near the contact with large granitic bodies. Changes to fresnoite at 960 deg C.
IMA Status:
Approved IMA 1984
Locality:
Rush Creek, Fresno County, California, USA. Link to MinDat.org Location Data.
Name Origin:
Named for taramellite and dominance of Ti as the octahedral cation.
Name Pronunciation:
Titantaramellite + Pronunciation 
Synonym:
ICSD 100266
PDF 17-479
Titantaramellite Image
Images:
Images:
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Titantaramellite Alforsite Sanbornite Celsian Comments: SEM image showing alforsite (al). Matrix composed by lamellar sanbornite (sa) and granular quartz (q). Rectangular crystal in the upper right corner is titantaramellite (ti) and isometric crystals included in sanbornite are celsian (ce). Location: Trumbull Peak, near Incline, Mariposa Co., California, USA.Scale: See Image. © Pavel M. Kartashov |
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Titantaramellite Crystallography
Axial Ratios:
a:b:c =0.8697:1:0.5112
Cell Dimensions:
a = 12.137, b = 13.955, c = 7.134, Z = 2; V = 1,208.30 Den(Calc)= 3.97
Crystal System:
Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pmmn
X Ray Diffraction:
By Intensity(I/Io): 3.01(1), 2.584(0.55), 3.83(0.5),
Crystal Structure:
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drag2 - RMB Resize/Rotate
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| | Mazzi F , Rossi G , American Mineralogist , 65 (1980) p.123-128, The crystal structure of taramellite, Locality: Rush Creek, Fresno County, California, USA | | -------------------------------------------------------------------------------------------------------------------------------------------------------------- |
Physical Properties of Titantaramellite
Cleavage:
{100} Perfect
Color:
Bronze brown, Purple red.
Density:
4 - 4.08, Average = 4.04
Diaphaneity:
Translucent to opaque
Habit:
Anhedral Grains - Granular minerals without the expression of crystal shapes
Habit:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Hardness:
5.5-6 - Knife Blade-Orthoclase
Optical Properties of Titantaramellite
Gladstone-Dale:
CI meas= 0.037 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.02 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1912,KPDmeas= 0.1879,KC= 0.1951
Ncalc = 1.77 - 1.8
Optical Data:
Biaxial (+), a=1.739-1.753, b=1.749-1.761, g=1.77-1.782, bire=0.0290-0.0310, 2V(Calc)=64-70, 2V(Meas)=45-77.
Pleochroism (x):
yellowish brown.
Pleochroism (y):
yellowish brown.
Pleochroism (z):
opaque.
Calculated Properties of Titantaramellite
Electron Density:
Bulk Density (Electron Density)=3.65 gm/cc
note: Specific Gravity of Titantaramellite =3.97 gm/cc.
Fermion Index:
Fermion Index = 0.08
Boson Index = 0.92
Photoelectric:
PETitantaramellite = 165.23 barns/electron
U=PETitantaramellite x rElectron Density= 603.86 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Titantaramellite is Not Radioactive
Titantaramellite Classification
Dana Class:
64.03.01.02 (64)Cyclosilicates
(64.03)4-membered rings with [Si2O7] dimers
(64.03.01)Taramellite group
64.03.01.01 Taramellite Ba4(Fe,Ti,Fe,Mg)4(B2Si8O27)O2Clx(x=0to1) Pmmn 2/m 2/m 2/m
64.03.01.02 Titantaramellite Ba4(Ti,Fe,Fe,Mg)4(B2Si8O27)O2ClxX=0TO1,withTi>Fe Pmmn 2/m 2/m 2/m
64.03.01.03 Nagashimalite Ba4(V,Ti)4Si8B2O27Cl(O,OH)2 Pmmn 2/m 2/m 2/m
Strunz Class:
09.CE.20 09 - SILICATES (Germanates)
09.C - Cyclosilicates
09.CE -[Si4O12]8- 4-membered single rings (vierer-Einfachringe),
09.CE.20 Nagashimalite Ba4(V,Ti)4Si8B2O27Cl(O,OH)2 Pmmn 2/m 2/m 2/m
09.CE.20 Titantaramellite Ba4(Ti,Fe,Fe,Mg)4(B2Si8O27)O2ClxX=0TO1,withTi>Fe Pmmn 2/m 2/m 2/m
09.CE.20 Taramellite Ba4(Fe,Ti,Fe,Mg)4(B2Si8O27)O2Clx(x=0to1) Pmmn 2/m 2/m 2/m
Other Titantaramellite Information
References:
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic2)
See Also:
Links to other databases for Titantaramellite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
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Print or Cut-and-Paste your Titantaramellite Specimen Label here :
Titantaramellite
Ba4(Ti,Fe+++,Fe++,Mg)4(B2Si8O27)O2Clx X=0 TO 1, with Ti > Fe
Dana No: 64.03.01.02 Strunz No: 09.CE.20
Locality:
Notes: