Bobtraillite Mineral Data

[What's New] [Mineral Galleries] [About Us] [Contacts] [Login]
At AA Mineral Specimens, we source quality Mineral Specimens, Fossils, Gemstones,
Decorative Stones, Lapidary Material and Specimen Sets world-wide

General Bobtraillite Information

Chemical Formula:

(Na,Ca)13Sr11(Zr,Y,Nb)14Si42B6O132(OH)12•12H2O

Composition:

Molecular Weight = 6,318.09 gm

Barium 0.35 % Ba 0.39 % BaO

Sodium 4.08 % Na 5.49 % Na₂O

Strontium 14.69 % Sr 17.37 % SrO

Calcium 0.77 % Ca 1.08 % CaO

Yttrium 0.89 % Y 1.13 % Y₂O₃

Hafnium 0.40 % Hf 0.47 % HfO₂

Zirconium 18.32 % Zr 24.75 % ZrO₂

Niobium 0.90 % Nb 1.28 % Nb₂O₅

Silicon 18.51 % Si 39.60 % SiO₂

Boron 1.03 % B 3.31 % B₂O₃

Hydrogen 0.57 % H 5.13 % H₂O

Oxygen 39.50 % O

______ ______

100.00 % 99.99 % = TOTAL OXIDE

Empirical Formula:

Na_11.2Ca_1.22Sr_10.59Ba_0.16Zr_12.69Y_0.63Nb_0.61Hf_0.14Si_41.64B₆O₁₃₂(OH)₁₂·12(H₂O)

Environment:

Found in igneous breccias and nepheline syenite pegmatites.

IMA Status:

Approved IMA 2001 (Dana # Added)

Locality:

Poudrette quarry, Mont Saint-Hilaire Link to MinDat.org Location Data.

Name Origin:

Named for Robert (Bob) James Traill (1921-), mineralogist, former head of the mineralogy section of the Geological Survey of Canada (1953-1986), and for his contributions to mineral ogy.

Synonym:

IMA2001-041

Bobtraillite Image

Images:

Bobtraillite

Comments: Transparent, hexagonal bobtraillite prisms, co-type material.
Location: Mont Saint-Hilaire, Rouville County, Quebec, Canada. Scale: See Image.
© Rruff Database

Bobtraillite Crystallography

Axial Ratios:

a:c = 1:0.50602

Cell Dimensions:

a = 19.72, c = 9.9788, Z = 1; V = 3,360.65 Den(Calc)= 3.12

Crystal System:

Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: P 3c1

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

By Intensity(I/I_o): 2.745(1)(332), 3.95(0.6)(212), 3.12(0.55)(331),3.75(0.46)(302), 17.08(0.44)(100), 1.987(0.43)(334), 6.46(0.39)(210), 5.42(0.34)(211), 1.898(0.32)(900),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

McDonald A M , Chao G Y , The Canadian Mineralogist , 43 (2005) p.747-758, Bobtraillite, (Na,Ca)13Sr11(Zr,Y,Nb)14Si42B6O132(OH)12*12H2O,, a new mineral species from mont Saint-Hilaire, Quebec: description,, structure determination and relationship to benitoite and wadeite, Locality: Poudrette quarry, Mont Saint-Hilaire, Quebec, Canada

Physical Properties of Bobtraillite

Cleavage:

None

Color:

Gray, Pale green, Brown.

Diaphaneity:

Translucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Blocky - Crystal shape tends to be equant (e.g. feldspars).

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

5.5 - Knife Blade

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Bobtraillite

Gladstone-Dale:

CI calc= -0.002 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2038,KC= 0.2034
Ncalc = 1.63

Optical Data:

Uniaxial (+), w=1.627, e=1.645, bire=0.0180.

Calculated Properties of Bobtraillite

Electron Density:

Bulk Density (Electron Density)=2.99 gm/cc
note: Specific Gravity of Bobtraillite =3.12 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_Bobtraillite= 49.66 barns/electron
U=PE_Bobtraillite x rElectron Density= 148.29 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bobtraillite is Not Radioactive

Bobtraillite Classification

Dana Class:

59.02.02.06 (59)Cyclosilicate Three-Membered Rings

(59.02)hydrated

(59.02.02)Catapleiite group

59.02.02.01 Catapleiite (Na,Ca,[])2ZrSi3O9•2(H2O) B2/b (pseudo-HEX) 2/m

59.02.02.02 Calciocatapleiite (Ca,[])ZrSi3O9•2(H2O) Pbnn 2/m 2/m 2/m

59.02.02.03 Gaidonnayite Na2ZrSi3O9•2(H2O) P 2₁nb mm2

59.02.02.04 Georgechaoite KNaZrSi3O9•2(H2O) P 2₁nb mm2

59.02.02.05 Loudounite NaCa5Zr4Si16O40(OH)11•8(H2O) Mono

59.02.02.06 Bobtraillite! (Na,Ca)13Sr11(Zr,Y,Nb)14Si42B6O132(OH)12•12H2O P 3c1 3 2/m

Strunz Class:

09.CA.30 09 - SILICATES (Germanates)

09.C - Cyclosilicates

09.CA -[Si3O9]6- 3-membered single rings (dreier-Einfachringe),

09.CA.30 Bobtraillite! (Na,Ca)13Sr11(Zr,Y,Nb)14Si42B6O132(OH)12•12H2O P 3c1 3 2/m

Other Bobtraillite Information

References:

NAME( AmMin, v90, p1945) PHYS. PROP.(AmMin, v90, p1945) OPTIC PROP.(AmMin, v90, p1945)

See Also:

Links to other databases for Bobtraillite :
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
10 - Ruff.Info

Search for Bobtraillite using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Bobtraillite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Bobtraillite Mineral Data :

Ask about Bobtraillite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Bobtraillite Specimen Label here :

Bobtraillite

(Na,Ca)13Sr11(Zr,Y,Nb)14Si42B6O132(OH)12•12H2O
Dana No: 59.02.02.06 Strunz No: 09.CA.30
Locality:

Notes: