Fluorthalenite-(Y) Mineral Data + 
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- 55.2.1b.1 Rowlandite-(Y) Y4FeSi4O14F2(?) None
- 55.2.1b.2 Thalenite-(Y) Y3Si3O10(OH) P 21/n 2/m
- 55.2.1b.3 Yttrialite-(Y) (Y,Th)2Si2O7 P 21/m 2/m
- 55.2.1b.4 Fluorthalenite-(Y) ! Y3Si3O10F P 21/m 2/m
- VIII/C.33-05 Fluorthalenite-(Y) Y3Si3O10F P 21/m 2/m
- VIII/C.33-10 Thalenite-(Y) Y3Si3O10(OH) P 21/n 2/m
General Fluorthalenite-(Y) Information |
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 Chemical Formula: |
Y3Si3O10F | ||
| Composition: |
Molecular Weight = 529.97 gm | ||
| Yttrium 50.33 % Y 63.91 % Y2O3 | |||
| Silicon 15.90 % Si 34.01 % SiO2 | |||
| Oxygen 30.19 % O | |||
| Fluorine 3.58 % F 3.58 % F | |||
| - % F -1.51 % -O=F2 | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Y3Si3O10F | ||
| Environment: |
"Amazonite" (microcline) pegmatites. | ||
| IMA Status: |
Approved IMA 1997 (Dana # Added) | ||
| Locality: |
Ploskaya Mountain, western Keiv, Kola Peninsula, Russia. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named as the F analog of thalenite-(Y). | ||
| Synonym: |
IMA1994-022 | ||
Search for Fluorthalenite-(Y) Images | |||
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Images:
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Fluorthalenite-(Y) Crystallography |
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| Axial Ratios: |
a:b:c =0.6575:1:0.9319 | ||
| Cell Dimensions: |
a = 7.321, b = 11.133, c = 10.375, Z = 4; beta = 97.166° V = 839.01 Den(Calc)= 4.20 | ||
| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/m | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.12(1), 2.253(0.8), 2.828(0.8), | ||
Physical Properties of Fluorthalenite-(Y) |
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| Cleavage: |
None | ||
| Color: |
Colorless, White. | ||
| Density: |
4.24 | ||
| Diaphaniety: |
Translucent | ||
| Fracture: |
Brittle - Uneven - Very brittle fracture producing uneven fragments. | ||
| Habit: |
Disseminated - Occurs in small, distinct particles dispersed in matrix. | ||
| Habit: |
Euhedral Crystals - Occurs as well-formed crystals showing good external form. | ||
| Hardness: |
4-5 - Fluorite-Apatite | ||
| Luster: |
Adamantine | ||
| Streak: |
white | ||
Optical Properties of Fluorthalenite-(Y) |
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| Gladstone-Dale: |
CI meas= 0.042 (Good) - where the CI = (1-KPDmeas/KC) CI calc= 0.033 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1751,KPDmeas= 0.1734,KC= 0.1811 |
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| Optical Data: |
Biaxial (-), a=1.719, b=1.739, g=1.748, bire=0.0290, 2V(Calc)=66, 2V(Meas)=73. Dispersion r < v moderate. | ||
Calculated Properties of Fluorthalenite-(Y) |
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| Electron Density: |
relectron=3.93 gm/cc |
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| Fermion Index |
Fermion Index = 0.00756 Boson Index = 0.99244 |
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| Photoelectric: |
PEFluorthalenite-(Y) = 63.76 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Fluorthalenite-(Y) is Not Radioactive |
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Fluorthalenite-(Y) Classification |
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| Dana Class: |
55.2.1b.4 (55)Sorosilicate Si2O7 Groups, Generally with No Additional Anions | ||
| (55.2)with cations in [6] coordination | |||
| (55.2.1b)Thortveitite related species | |||
| Strunz Class: |
VIII/C.33-05 VIII - Silicates | ||
| VIII/C - Sorosilicates with [Si3O10]8- groups | |||
| VIII/C.33 - Thalenite-(Y) series | |||
Other Fluorthalenite-(Y) Information |
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| References: |
NAME( AmMin) PHYS. PROP.(Am.Min.,Vol.83,p908,1998) OPTIC PROP.(AmMin) | ||
| See Also: |
Links to other databases for Fluorthalenite-(Y) : 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 Search for Fluorthalenite-(Y) using: Visit our Advertisers for Fluorthalenite-(Y) : Translate Fluorthalenite-(Y) Mineral Data : Ask about Fluorthalenite-(Y) here : Print or Cut-and-Paste your Fluorthalenite-(Y) Specimen Label here :
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