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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.


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Unique IdentifiersHide

Mindat ID:
4353
Long-form identifier:
mindat:1:1:4353:9

IMA Classification of YaroslaviteHide

Classification of YaroslaviteHide

Strunz-mindat (2026):
3.CB.50

3 : HALIDES
C : Complex halides
B : Neso-aluminofluorides
Dana 8th ed.:
11.6.15.1

11 : HALIDE COMPLEXES
6 : Aluminofluorides - Isolated Octahedra
Hey's CIM Ref.:
8.6.14

8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
6 : Halides of Al

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
YslIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Pronunciation of YaroslaviteHide

Pronunciation:
PlayRecorded byCountry
Jolyon RalphUnited Kingdom

Physical Properties of YaroslaviteHide

Lustre:
Vitreous
Transparency:
Transparent
Colour:
White
Streak:
White
Hardness:
4 on Mohs scale
Hardness:
VHN100=264 - Vickers
Cleavage:
Distinct/Good
One direction, pinacoidal
Fracture:
Irregular/Uneven
Density:
3.09 g/cm3 (Measured)    3.15 g/cm3 (Calculated)

Optical Data of YaroslaviteHide

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
Based on recorded range of RI values above.

Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.

Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.

Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.

Surface Relief:
Moderate
Dispersion:
relatively strong

Chemistry of YaroslaviteHide

Mindat Formula:
Ca3Al2F10(OH)2 · H2O
Element Weights:
Element% weight
F45.646 %
Ca28.888 %
Al12.965 %
O11.532 %
H0.969 %

Calculated from ideal end-member formula.
Elements listed:
Al, Ca, F, H, O - search for minerals with similar chemistry

Crystallography of YaroslaviteHide

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 DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
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 EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest 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 YaroslaviteHide

Type Locality:
ⓘ Yaroslavskoye Sn/fluorite Deposit, Voznesenskii ore district, Khorolsky District, Primorsky Krai, Russia
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:
SellaiteGearksutiteChukhrovite-(Ce)
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 YaroslaviteHide

Common AssociatesHide

Associations Based on Photo Data:
2 photos of Yaroslavite associated with ProsopiteCaAl2F4[(OH)4-xFx]
2 photos of Yaroslavite associated with FluoriteCaF2
1 photo of Yaroslavite associated with QuartzSiO2

Related Minerals - Strunz-mindat GroupingHide

3.CB.05CryolithioniteNa3Al2(LiF4)3Iso. m3m(4/m32/m) : Ia3d
3.CB.15ElpasoliteK2NaAlF6Iso. m3(2/m3) : Pa3
3.CB.15SimmonsiteNa2LiAlF6Mon.
3.CB.15CryoliteNa2NaAlF6Mon. 2/m
3.CB.20ColquiriiteCaLi[AlF6]Trig.
3.CB.25LeonardseniteMgAlF5 · 2H2O Orth. mmm(2/m2/m2/m) : Imma
3.CB.25WeberiteNa2Mg[AlF6]FOrth. mmm(2/m2/m2/m) : Immm
3.CB.30KarasugiteSrCa[Al(F,OH)7]Mon. 2/m : P21/b
3.CB.35UsoviteBa2CaMgAl2F14Mon. 2/m : B2/b
3.CB.40ThomsenoliteNaCa[AlF6] · H2OMon. 2/m : P21/b
3.CB.40PachnoliteNaCa[AlF6] · H2OMon. 2/m
3.CB.45CarlhintzeiteCa2[AlF6]F · H2OTric.
3.CB.55SbacchiiteCa2AlF7Orth. mmm(2/m2/m2/m) : Pnma
3.CB.60VerneiteNa2Ca3Al2F14Iso. 23 : I213

Fluorescence of YaroslaviteHide

In UV light:
Pale violet

Other InformationHide

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 YaroslaviteHide

References for YaroslaviteHide

Localities for YaroslaviteHide

Showing 2 localities.

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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Locality ListHide

- 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Greece
 
  • Attica
    • East Attica
      • Lavreotiki
        • Agios Konstantinos (Kamariza)
          • Mercati mines
Rieck et al. (2018)
Russia (TL)
 
  • Primorsky Krai
    • Khorolsky District
      • Voznesenskii ore district
Pekov (1998)
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