Yaroslavite Mineral Data + 
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- 11.6.15.1 Yaroslavite Ca3Al2F10(OH)2·(H2O) Unk Ortho
- III/C.02-10 Pachnolite NaCaAlF6·(H2O) F2/d 2/m
- III/C.02-20 Thomsenolite NaCaAlF6·(H2O) P 21/c 2/m
- III/C.02-30 Yaroslavite Ca3Al2F10(OH)2·(H2O) Unk Ortho
General Yaroslavite Information |
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 Chemical Formula: |
Ca3Al2F10(OH)2·(H2O) | ||
| Composition: |
Molecular Weight = 416.21 gm | ||
| Calcium 28.89 % Ca 40.42 % CaO | |||
| Aluminum 12.97 % Al 24.50 % Al2O3 | |||
| Hydrogen 0.97 % H 8.66 % H2O | |||
| Oxygen 11.53 % O | |||
| Fluorine 45.65 % F 45.65 % F | |||
| - % F -19.22 % -O=F2 | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Ca3Al2F10(OH)2·(H2O) | ||
| Environment: |
In banded fluorite-sellaite-tournaline ores. | ||
| IMA Status: |
Approved IMA 1966 | ||
| Locality: |
Yaroslav, Siberia, Russia. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for the locality. | ||
Search for Yaroslavite Images | |||
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Images:
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Yaroslavite Crystallography |
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| Axial Ratios: |
a:b:c =1.5804:1:0.8155 | ||
| Cell Dimensions: |
a = 8.74, b = 5.53, c = 4.51, Z = 1; V = 217.98 Den(Calc)= 3.17 | ||
| Crystal System: |
OrthorhombicSpace Group: Unk | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.445(1), 2.222(0.8), 3.653(0.7), | ||
Physical Properties of Yaroslavite |
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| Cleavage: |
[???] Good, [???] Good | ||
| Color: |
White. | ||
| Density: |
3.09 | ||
| Diaphaniety: |
Transparent | ||
| Fracture: |
Irregular - Flat surfaces (not cleavage) fractured in an irregular pattern. | ||
| Habit: |
Fibrous - Crystals made up of fibers. | ||
| Habit: |
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite) | ||
| Habit: |
Spherical - Spherical, rounded aggregates. | ||
| Hardness: |
4.5 - Between Fluorite and Apatite | ||
| Luminescence: |
Weakly Fluorescent, Short UV=pale violet. | ||
| Luster: |
Vitreous (Glassy) | ||
| Streak: |
white | ||
Optical Properties of Yaroslavite |
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| Gladstone-Dale: |
CI meas= 0.275 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= 0.294 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1317,KPDmeas= 0.1351,KC= 0.1865 |
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| Optical Data: |
Biaxial (-), a=1.413, b=1.416-1.417, g=1.423, bire=0.0100, 2V(Calc)=68-80, 2V(Meas)=74. | ||
Calculated Properties of Yaroslavite |
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| Electron Density: |
relectron=3.03 gm/cc |
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| Fermion Index |
Fermion Index = 0.00044 Boson Index = 0.99956 |
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| Photoelectric: |
PEYaroslavite = 4.23 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Yaroslavite is Not Radioactive |
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Yaroslavite Classification |
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| Dana Class: |
11.6.15.1 (11)Halide Complexes; Alumino-fluorides | ||
| (11.6)with miscellaneous formulae | |||
| (11.6.15)Dana Group | |||
| Strunz Class: |
III/C.02-30 III - Halogenides | ||
| III/C - Double halogenides with water, Fluorides | |||
| III/C.02 - Pachnolite - Yaroslavite series | |||
Other Yaroslavite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8) | ||
| See Also: |
Links to other databases for Yaroslavite : 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 -École des Mines de Paris Search for Yaroslavite using: Visit our Advertisers for Yaroslavite : Translate Yaroslavite Mineral Data : Ask about Yaroslavite here : Print or Cut-and-Paste your Yaroslavite Specimen Label here :
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