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Yaroslavite

Formula:
Ca
 
3
Al
 
2
F
 
10
(OH)
 
2
·H
 
2
O
System:OrthorhombicColour:White
Lustre:VitreousHardness:4
Name:Named after its discovery locality, Yaroslavskoye tin deposit, Primorskii Kray, Russia.
This page provides mineralogical data about Yaroslavite.

Classification of Yaroslavite

IMA status:Approved
Strunz 8th edition ID:3/C.02-30
Nickel-Strunz 10th (pending) edition ID:3.CB.50

3 : HALIDES
C : Complex halides
B : Neso-aluminofluorides
Dana 8th edition ID: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
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Type Occurrence of Yaroslavite

Type Locality:Yaroslavskoye Sn Deposit, Khanka Lake, Primorskiy Kray, Far-Eastern Region, Russia
Year of Discovery:1966

Physical Properties of Yaroslavite

Lustre:Vitreous
Diaphaneity (Transparency):Translucent
Colour:White
Streak:White
Hardness (Mohs):4

Crystallography of Yaroslavite

Crystal System:Orthorhombic
Cell Parameters:a = 8.76Å, b = 5.54Å, c = 4.52Å
Ratio:a:b:c = 1.581 : 1 : 0.816
Unit Cell Volume:V 219.36 ų (Calculated from Unit Cell)

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°
Maximum Birefringence:δ = 0.010

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:relatively strong

Chemical Properties of Yaroslavite

Formula:
Ca
 
3
Al
 
2
F
 
10
(OH)
 
2
·H
 
2
O
Essential elements:Al, Ca, F, H, O
All elements listed in formula:Al, Ca, F, H, O

Relationship of Yaroslavite to other Species

Related Minerals - Nickel-Strunz Grouping):
3.CB.05Cryolithionite
Na
 
3
Li
 
3
[AlF
 
6
]
 
2
3.CB.15Cryolite
Na
 
3
[AlF
 
6
]
3.CB.15Elpasolite
NaK
 
2
[AlF
 
6
]
3.CB.15Simmonsite
Na
 
2
Li[AlF
 
6
]
3.CB.20Colquiriite
CaLi[AlF
 
6
]
3.CB.25Weberite
Na
 
2
Mg[F|AlF
 
6
]
3.CB.30Karasugite
SrCa[Al(F,OH)
 
7
]
3.CB.35Usovite
Ba
 
2
CaMgAl
 
2
F
 
14
3.CB.40Pachnolite
NaCaAlF
 
6
·H
 
2
O
3.CB.40Thomsenolite
NaCaAlF
 
6
·H
 
2
O
3.CB.45Carlhintzeite
Ca
 
2
[F|AlF
 
6
] · H
 
2
O
Related Minerals - Hey's Index Grouping:
8.6.1Zharchikhite
AlF(OH)
 
2
8.6.2Chloraluminite
AlCl
 
3
·6H
 
2
O
8.6.3Cadwaladerite
Al(OH)
 
2
Cl·4H
 
2
O
8.6.4Cryolithionite
Na
 
3
Li
 
3
[AlF
 
6
]
 
2
8.6.5Cryolite
Na
 
3
[AlF
 
6
]
8.6.6Chiolite
Na
 
3
Al
 
3
F
 
14
8.6.7Elpasolite
NaK
 
2
[AlF
 
6
]
8.6.8Weberite
Na
 
2
Mg[F|AlF
 
6
]
8.6.9Ralstonite
NaMgAl(F,OH)
 
6
·H
 
2
O
8.6.10Koenenite
Na
 
4
Mg
 
9
Al
 
4
Cl
 
12
(OH)
 
22
8.6.11 Chlor-manasseite
Mg
 
x
Al(OH)
 
2x+2
Cl·(x-0.8)H
 
2
O x about 1.75
8.6.12Gearksutite
Ca[Al(F,OH)
 
5
(H
 
2
O)]
8.6.13Prosopite
CaAl
 
2
(F,OH)
 
8
8.6.15Carlhintzeite
Ca
 
2
[F|AlF
 
6
] · H
 
2
O
8.6.16Colquiriite
CaLi[AlF
 
6
]
8.6.17Thomsenolite
NaCaAlF
 
6
·H
 
2
O
8.6.18Pachnolite
NaCaAlF
 
6
·H
 
2
O
8.6.19Zirklerite
(Fe,Mg,Ca)
 
9
Al
 
4
Cl
 
18
(OH)
 
12
·14H
 
2
O (?)

Other Names for Yaroslavite

German names:
Yaroslavit
Spanish names:
Yaroslavita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Yaroslavite

Reference List:Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva (1966): 95(1): 39-44.

American Mineralogist (1966): 51: 1546-1547, 1820.


Articles/Blogs about Yaroslavite

Internet Links for Yaroslavite

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    Localities for Yaroslavite

    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Russia
     
    • Far-Eastern Region
      • Primorskiy Kray
        • Khanka Lake
    Mineral and/or Locality
    Google
     
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