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Karasugite

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Formula:
SrCa[Al(F,OH)7]
Colour:
colorless
Lustre:
Vitreous
Crystal System:
Monoclinic
Name:
Named by O.V. Petersen, A.P. Khomyakov, E.S. Leonardsen, H.I. Micheelsen, and O. Johnsen in 1994 for the Karasug REE-Sr-Ba-Fe-fluorite deposit, Russia.
This page provides mineralogical data about Karasugite.


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Classification of KarasugiteHide

Approved
3.CB.30

3 : HALIDES
C : Complex halides
B : Neso-aluminofluorides
11.6.21.1

11 : HALIDE COMPLEXES
6 : Aluminofluorides - Isolated Octahedra

Physical Properties of KarasugiteHide

Vitreous
Transparency:
Transparent
Colour:
colorless
Streak:
white

Optical Data of KarasugiteHide

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

Formula:
SrCa[Al(F,OH)7]
IMA Formula:
SrCaAlF7
Common Impurities:
Na

Crystallography of KarasugiteHide

Crystal System:
Monoclinic
Cell Parameters:
a = 8.21 Å, b = 11.98 Å, c = 6.07 Å
β = 96.22°
Ratio:
a:b:c = 0.685 : 1 : 0.507
Unit Cell V:
593.51 ų (Calculated from Unit Cell)
Twinning:
(001)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
6.76 (7)
4.25 (10)
3.64 (8)
3.15 (7)
3.06 (8)
3.03 (7)
2.125 (8)

Type Occurrence of KarasugiteHide

Synonyms of KarasugiteHide

Other Language Names for KarasugiteHide

German:Karasugit
Spanish:Karasugita

Related Minerals - Nickel-Strunz GroupingHide

3.CB.05CryolithioniteNa3Li3[AlF6]2Iso. m3m (4/m 3 2/m) : Ia3d
3.CB.15CryoliteNa2NaAlF6Mon. 2/m
3.CB.15ElpasoliteK2NaAlF6Iso. m3 (2/m 3) : Pa3
3.CB.15SimmonsiteNa2LiAlF6Mon.
3.CB.20ColquiriiteCaLi[AlF6]Trig.
3.CB.25WeberiteNa2Mg[AlF6]FOrth. mmm (2/m 2/m 2/m) : Immm
3.CB.35UsoviteBa2CaMgAl2F14Mon.
3.CB.40PachnoliteNaCa[AlF6] · H2OMon. 2/m
3.CB.40ThomsenoliteNaCa[AlF6] · H2OMon. 2/m : P21/b
3.CB.45CarlhintzeiteCa2[AlF6]F · H2OTric.
3.CB.50YaroslaviteCa3Al2F10(OH)2 · H2OOrth.

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.

References for KarasugiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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.
Jambor, J.L., Roberts, A.C. (1995) New mineral names. American Mineralogist: 80: 184-188.
Mandarino, J.A. (1997) New Minerals 1990-1994. The Mineralogical Record Inc., Tucson, AZ: 231 pages.

Internet Links for KarasugiteHide

Localities for KarasugiteHide

ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Russia (TL)
 
  • 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
Mineral and/or Locality  
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