Tveitite-(Y) Mineral Data + 
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- 9.2.1.1 Fluorite CaF2 F m3m 4/m 3 2/m
- 9.2.1.2 Frankdicksonite BaF2 F m3m 4/m 3 2/m
- 9.2.1.3 Tveitite-(Y) Ca1-xYxF2x,x~0.3 Unk Mono
- III/A.08-10 Fluorite CaF2 F m3m 4/m 3 2/m
- III/A.08-20 Frankdicksonite BaF2 F m3m 4/m 3 2/m
- III/A.08-25 Haleniusite-(La)! (La,Ce)OF F m3m 4/m 3 2/m
- III/A.08-30 Tveitite-(Y) Ca1-xYxF2x,x~0.3 Unk Mono
- III/A.08-40 Gagarinite-(Y) NaCaY(F,Cl)6 P 3 3
- III/A.08-45 Zajacite-(Ce) Na(REExCa1-x)(REEyCa1-y)F6where(xney) P 3 3
- III/A.08-50 Laurelite Pb7F12Cl2 P 6 6
- III/A.08-60 Coccinite* HgI2(?) P 41/nmc 4/m 2/m 2/m
General Tveitite-(Y) Information |
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 Chemical Formula: |
Ca1-xYxF2+x, x~0.3 | ||
| Composition: |
Molecular Weight = 98.42 gm | ||
| Calcium 28.50 % Ca 39.88 % CaO | |||
| Yttrium 27.10 % Y 34.41 % Y2O3 | |||
| Fluorine 44.40 % F 44.40 % F | |||
| - % F -18.69 % -O=F2 | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Ca0.7Y0.3F2.3 | ||
| Environment: |
In pegmatites. | ||
| IMA Status: |
Approved IMA 1977 | ||
| Locality: |
Hoydalen, Telmark, Norway. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for John Peder Tveit (1909-1978), Norwegian miner, who found it in his quarry. | ||
| Synonym: |
ICSD 35143 | ||
| PDF 29-364 | |||
Search for Tveitite-(Y) Images | |||
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Images:
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Tveitite-(Y) Crystallography |
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| Axial Ratios: |
a:b:c =1.0079:1:1.4189 | ||
| Cell Dimensions: |
a = 3.924, b = 3.893, c = 5.524, Z = 2; beta = 90.27° V = 84.38 Den(Calc)= 3.87 | ||
| Crystal System: |
MonoclinicSpace Group: Unk | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.18(1), 1.265(0.8), 1.949(0.7), | ||
Physical Properties of Tveitite-(Y) |
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| Color: |
White, Light yellow. | ||
| Luminescence: |
Fluorescent, Short UV=faint yellow orange. | ||
| Luster: |
Greasy (Oily) | ||
| Streak: |
white | ||
Optical Properties of Tveitite-(Y) |
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| Gladstone-Dale: |
CI calc= 0.242 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1237,KC= 0.1631 |
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| Optical Data: |
Biaxial (-), a=1.476, b=1.479, g=1.481, bire=0.0050 | ||
| Pleochroism (x): |
colorless. | ||
| Pleochroism (y): |
colorless. | ||
| Pleochroism (z): |
colorless. | ||
Calculated Properties of Tveitite-(Y) |
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| Electron Density: |
relectron=3.65 gm/cc |
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| Fermion Index |
Fermion Index = 0.00038 Boson Index = 0.99962 |
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| Photoelectric: |
PETveitite-(Y) = 37.63 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Tveitite-(Y) is Not Radioactive |
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Tveitite-(Y) Classification |
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| Dana Class: |
9.2.1.3 (9)Anhydrous and Hydrated Halides | ||
| (9.2)where A (X)2 | |||
| (9.2.1)Dana Group | |||
| Strunz Class: |
III/A.08-30 III - Halogenides | ||
| III/A - Simple Halogenides, without water Metal : Halogen = 1 : 2, 1 : 3 | |||
| III/A.08 - Fluorite series and related compounds | |||
Other Tveitite-(Y) Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Tveitite-(Y) : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST Search for Tveitite-(Y) using: Visit our Advertisers for Tveitite-(Y) : Translate Tveitite-(Y) Mineral Data : Ask about Tveitite-(Y) here : Print or Cut-and-Paste your Tveitite-(Y) Specimen Label here :
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