Yaroslavite
A valid IMA mineral species
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Formula:
Ca3Al2F10(OH)2 · H2O
Colour:
White
Lustre:
Vitreous
Hardness:
4
Specific Gravity:
3.09
Crystal System:
Orthorhombic
Name:
Named after its discovery locality, Yaroslavskoye tin deposit, Primorskii Kray, Russia.
This page provides mineralogical data about Yaroslavite.
Unique Identifiers
Mindat ID:
4353
Long-form identifier:
mindat:1:1:4353:9
GUID
(UUID V4):
(UUID V4):
de1d6d1e-44d3-4a57-b193-2ff7d95f6010
IMA Classification of Yaroslavite
Approved
Classification of Yaroslavite
3.CB.50
3 : HALIDES
C : Complex halides
B : Neso-aluminofluorides
3 : HALIDES
C : Complex halides
B : Neso-aluminofluorides
11.6.15.1
11 : HALIDE COMPLEXES
6 : Aluminofluorides - Isolated Octahedra
11 : HALIDE COMPLEXES
6 : Aluminofluorides - Isolated Octahedra
8.6.14
8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
6 : Halides of Al
8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
6 : Halides of Al
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Ysl | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of Yaroslavite
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Physical Properties of Yaroslavite
Vitreous
Transparency:
Transparent
Colour:
White
Streak:
White
Hardness:
4 on Mohs scale
Hardness:
VHN100=264 - Vickers
Cleavage:
Distinct/Good
One direction, pinacoidal
One direction, pinacoidal
Fracture:
Irregular/Uneven
Density:
3.09 g/cm3 (Measured) 3.15 g/cm3 (Calculated)
Optical Data of Yaroslavite
Type:
Biaxial (+)
RI values:
nα = 1.413 nβ = 1.416 - 1.417 nγ = 1.423
2V:
Measured: 74° , Calculated: 68° to 80°
Max Birefringence:
δ = 0.010
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
relatively strong
Chemistry of Yaroslavite
Mindat Formula:
Ca3Al2F10(OH)2 · H2O
Crystallography of Yaroslavite
Crystal System:
Orthorhombic
Cell Parameters:
a = 8.74(1) Å, b = 5.53(1) Å, c = 4.51(2) Å
Ratio:
a:b:c = 1.58 : 1 : 0.816
Unit Cell V:
217.98 ų (Calculated from Unit Cell)
Z:
1
Comment:
Point Group: n.d.; Space Group: n.d.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.50 Å | (6) |
| 3.653 Å | (7) |
| 3.445 Å | (10) |
| 2.827 Å | (5) |
| 2.222 Å | (8) |
| 1.835 Å | (6) |
| 1.454 Å | (6) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47g : [Halogen-bearing surface weathering minerals] |
Type Occurrence of Yaroslavite
General Appearance of Type Material:
compact oval to spherical growths with radiating fibrous structure, to 3 mm
Place of Conservation of Type Material:
Vernadsky Geological Museum, Moscow, Russia.
Associated Minerals at Type Locality:
Reference:
Novikova, M.I., Sidorenko, G.A., Kuznetsova, M.N. (1966): Yaroslavite a new calcium aluminum fluoride. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 95 (1), 39-44.
Other Language Names for Yaroslavite
German:Yaroslavit
Spanish:Yaroslavita
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 3.CB.05 | Cryolithionite | Na3Al2(LiF4)3 |
| 3.CB.15 | Cryolite | Na2NaAlF6 |
| 3.CB.15 | Elpasolite | K2NaAlF6 |
| 3.CB.15 | Simmonsite | Na2LiAlF6 |
| 3.CB.20 | Colquiriite | CaLi[AlF6] |
| 3.CB.25 | Weberite | Na2Mg[AlF6]F |
| 3.CB.25 | Leonardsenite | MgAlF5 · 2H2O |
| 3.CB.30 | Karasugite | SrCa[Al(F,OH)7] |
| 3.CB.35 | Usovite | Ba2CaMgAl2F14 |
| 3.CB.40 | Pachnolite | NaCa[AlF6] · H2O |
| 3.CB.40 | Thomsenolite | NaCa[AlF6] · H2O |
| 3.CB.45 | Carlhintzeite | Ca2[AlF6]F · H2O |
| 3.CB.55 | Sbacchiite | Ca2AlF7 |
| 3.CB.60 | Verneite | Na2Ca3Al2F14 |
Fluorescence of Yaroslavite
Pale violet
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Yaroslavite
mindat.org URL:
https://www.mindat.org/min-4353.html
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References for Yaroslavite
Reference List:
Localities for Yaroslavite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Greece | |
| Rieck et al. (2018) |
Russia (TL) | |
| Pekov (1998) |
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