Thalenite-(Y) Mineral Data

Advertisment

John Betts - Fine Minerals, New York. Dealers of Fine Minerals and Natural Crystal Clusters since 1989. We buy rock collections, we buy gem collections, we buy mineral collections.

For more than thirty (30) years, Excalibur Mineral Corp. has been providing private collectors, researchers, major universities and museums throughout the world with reliably identified, rare and unusual mineral samples for science an

Dakota Matrix was founded in 1996 and has offered systematic and rare mineral specimens online since 1998.

McDougall Minerals sells high-quality mineral specimens from all over the world to collectors of all levels, from beginners to connoisseurs

General Thalenite-(Y) Information

Chemical Formula:

Y3Si3O10(OH)

Composition:

Molecular Weight = 527.98 gm

Yttrium 50.52 % Y 64.15 % Y₂O₃

Silicon 15.96 % Si 34.14 % SiO₂

Hydrogen 0.19 % H 1.71 % H₂O

Oxygen 33.33 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Y₃Si₃O₁₀(OH)

IMA Status:

Valid Species (Pre-IMA) 1898

Locality:

Askagen, Vermland, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named for Tobins Robert Thalen (1827-1905), Swedish physicist.

Name Pronunciation:

Thalenite-(Y) + Pronunciation

Synonym:

ICSD 65001

PDF 38-439

Thalenite-(Y) Image

Images:

Thalenite-(Y)

Comments: Subhedral, brownish thalenite-(Y) crystal embedded in a sucrosic matrix of yttrian fluorite.
Location: Hundholmen, Tysfjord, Norway. Scale: 0.5 cm.
© Sigurd Stordal / University of Tromsoe

Thalenite-(Y) Crystallography

Axial Ratios:

a:b:c =0.9323:1:0.6573

Cell Dimensions:

a = 10.34, b = 11.09, c = 7.29, Z = 4; beta = 96.9° V = 829.89 Den(Calc)= 4.23

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/n

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

By Intensity(I/I_o): 3.1(1), 2.81(0.4), 2.75(0.3),

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

Kornev A N , Batalieva N G , Maksimov B A , Ilyukhin V V , Belov N V , Soviet Physics Doklady , 17 (1972) p.88-90, Crystal structure of the talenite Y3 [Si3O10](OH), Locality: Russia

Physical Properties of Thalenite-(Y)

Cleavage:

None

Color:

Pink, Brownish green, Brown.

Density:

4.2

Diaphaneity:

Translucent to subtranslucent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

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

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

6-6.5 - Orthoclase-Pyrite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Thalenite-(Y)

Gladstone-Dale:

CI meas= 0.055 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.062 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1744,KPDmeas= 0.1756,KC= 0.1859
Ncalc = 1.78 - 1.79

Optical Data:

Biaxial (-), a=1.731, b=1.738, g=1.744, bire=0.0130, 2V(Calc)=84, 2V(Meas)=68.

Calculated Properties of Thalenite-(Y)

Electron Density:

Bulk Density (Electron Density)=3.95 gm/cc
note: Specific Gravity of Thalenite-(Y) =4.20 gm/cc.

Fermion Index:

Fermion Index = 0.0076128673
Boson Index = 0.9923871327

Photoelectric:

PE_{Thalenite-(Y)}= 63.75 barns/electron
U=PE_{Thalenite-(Y)} x rElectron Density= 251.53 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Thalenite-(Y) is Not Radioactive

Thalenite-(Y) Classification

Dana Class:

55.02.01b.02 (55)Sorosilicate Si2O7 Groups, Generally with No Additional Anions

(55.02)with cations in [6] coordination

(55.02.01b)Thortveitite related species

55.02.01b.01 Rowlandite-(Y) Y4FeSi4O14F2(?) None

55.02.01b.02 Thalenite-(Y) Y3Si3O10(OH) P 2₁/n 2/m

55.02.01b.03 Yttrialite-(Y) (Y,Th)2Si2O7 P 2₁/m 2/m

55.02.01b.04 Fluorthalenite-(Y)! Y3Si3O10F P 2₁/m 2/m

Strunz Class:

09.BJ.20 09 - SILICATES (Germanates)

09.B - Sorosilicates

09.BJ -Sorosilicates with Si3O10, Si4O11, etc

09.BJ.20 Fluorthalenite-(Y)! Y3Si3O10F P 2₁/m 2/m

09.BJ.20 Thalenite-(Y) Y3Si3O10(OH) P 2₁/n 2/m

Other Thalenite-(Y) Information

References:

NAME( Ford32) PHYS. PROP.(Dana8) OPTIC PROP.(Ford32)

See Also:

Links to other databases for Thalenite-(Y) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
13 - WWW-MINCRYST

Search for Thalenite-(Y) using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Thalenite-(Y) :

A Bijoux Google Search for Thalenite-(Y)
Adam's Minerals Google Search for Thalenite-(Y)
Cape Minerals Google Search for Thalenite-(Y)
Dakota Matrix Minerals Google Search for Thalenite-(Y)
Excalibur Mineral Corp. Google Search for Thalenite-(Y)
Exceptional Minerals Google Search for Thalenite-(Y)
John Betts Fine Minerals Search for Thalenite-(Y)
McDougall Minerals Google Search for Thalenite-(Y)
Mineral News Website Link
Rock and Mineral Shows Google Search for Thalenite-(Y)
Weinrich Minerals, Inc. Google Search for Thalenite-(Y)

Ask about Thalenite-(Y) 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 Thalenite-(Y) Specimen Label here :

Thalenite-(Y)

Y3Si3O10(OH)
Dana No: 55.02.01b.02 Strunz No: 09.BJ.20
Locality:

Notes: