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Karasugite

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Formula:
SrCa[Al(F,OH)
 
7
]
System:Monoclinic
This page provides mineralogical data about Karasugite.

Classification of Karasugite

IMA status:Approved
Strunz 8th edition ID:3/C.03-45
Nickel-Strunz 10th (pending) edition ID:3.CB.30

3 : HALIDES
C : Complex halides
B : Neso-aluminofluorides
Dana 8th edition ID:11.6.21.1

11 : HALIDE COMPLEXES
6 : Aluminofluorides - Isolated Octahedra
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Type Occurrence of Karasugite

Type Locality:Karasug REE-Sr-Ba-Fe-fluorite deposit, Tannu-Ola Range, Tuva Republic, Eastern-Siberian Region, Russia
Year of Discovery:1994

Crystallography of Karasugite

Crystal System:Monoclinic
Cell Parameters:a = 8.21Å, b = 11.98Å, c = 6.07Å
β = 96.22°
Ratio:a:b:c = 0.685 : 1 : 0.507
Unit Cell Volume:V 593.51 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
6.76 (7)
4.25 (10)
3.64 (8)
3.15 (7)
3.06 (8)
3.03 (7)
2.125 (8)

Optical Data of Karasugite

Type:Biaxial (+)
RI values: nα = 1.424 nβ = 1.432 nγ = 1.442
2V:Measured: 94° to 94.5°, Calculated: 86°
Maximum Birefringence:δ = 0.018

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

Chemical Properties of Karasugite

Formula:
SrCa[Al(F,OH)
 
7
]
Essential elements:Al, Ca, F, Sr
All elements listed in formula:Al, Ca, F, H, O, Sr
Common Impurities:Na

Relationship of Karasugite 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[AlF
 
6
]F
3.CB.35Usovite
Ba
 
2
CaMgAl
 
2
F
 
14
3.CB.40Pachnolite
NaCa[AlF
 
6
] · H
 
2
O
3.CB.40Thomsenolite
NaCa[AlF
 
6
] · H
 
2
O
3.CB.45Carlhintzeite
Ca
 
2
[AlF
 
6
]F · H
 
2
O
3.CB.50Yaroslavite
Ca
 
3
Al
 
2
F
 
10
(OH)
 
2
 · H
 
2
O

Other Names for Karasugite

Synonyms:
IMA1993-013
Other Languages:
German:Karasugit
Spanish:Karasugita

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 Karasugite

Reference List:

- +
Petersen, O. V., Khomyakov, A. P., Leonardsen, E. S., Micheelsen, H. I. & Johnsen, O. (1994): "Karasugite, SrCaAl[F,(OH)]7 a new mineral from the Karasug Fe-REE-barite-fluorite deposit, Tannu-Ola Range, South Siberia, Russia", Neues Jahrbuch für Mineralogie, Monatshefte: 209-216.

New Minerals (1997), New Minerals 1990-1994.

Internet Links for Karasugite

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    • Localities for Karasugite

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    (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
     
    • Eastern-Siberian Region
      • Tuva Republic
        • Tannu-Ola Range
    		O. V. Petersen et al.: N. Jb. Mineral. Mh. 209-216 (1994); Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
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