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Faizievite

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Formula:
K2Na(Ca6Na)Ti4Li6[F2|Si24O66]
Colour:
Colorless
Lustre:
Vitreous
Hardness:
4 - 4½
Specific Gravity:
2.83
Crystal System:
Triclinic
Name:
name honors Faiziev Abdulkhak Radzhabovitch (born 1938) of Dushanbe, Tadjikistan, professor and member-correspondent of the Academy of Sciences of the Republic of Tadjikistan.
Related to the Beryl Group and Osumilite Group minerals. Unique combination of elements, but also a chemical similarity to baratovite and katayamalite.


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Classification of FaizieviteHide

Approved
Approval Year:
2006
9.CM.10

9 : SILICATES (Germanates)
C : Cyclosilicates
M : [Si6O18]12- 6-membered double rings (sechser-Doppelringe)
63.2.10.1

63 : CYCLOSILICATES Condensed Rings
2 : Condensed Rings (Milarite - Osumilite group)

Physical Properties of FaizieviteHide

Vitreous
Transparency:
Transparent
Colour:
Colorless
Hardness:
4 - 4½ on Mohs scale
Hardness:
VHN50=445 kg/mm2 - Vickers
Tenacity:
Brittle
Density:
2.83(2) g/cm3 (Measured)    2.819 g/cm3 (Calculated)

Optical Data of FaizieviteHide

Type:
Biaxial (+)
RI values:
nα = 1.651(2) nβ = 1.655(2) nγ = 1.657(2)
2V:
Measured: 72° (2), Calculated: 70.4°
Max Birefringence:
δ = 0.006
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of FaizieviteHide

Formula:
K2Na(Ca6Na)Ti4Li6[F2|Si24O66]
IMA Formula:
Li6K2Na(Ca6Na)Ti4(Si6O18)2(Si12O30)F2

Crystallography of FaizieviteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 9.8156(9) Å, b = 9.8249(9) Å, c = 17.3087(16) Å
α = 99.209(2)°, β = 94.67(2)°, γ = 119.839(1)°
Ratio:
a:b:c = 0.999 : 1 : 1.762
Unit Cell V:
1,403.74 ų (Calculated from Unit Cell)
Z:
1

Type Occurrence of FaizieviteHide

General Appearance of Type Material:
tabular plates without vicinal forms, and up to 0.3 cm in maximum dimension.
Place of Conservation of Type Material:
Fersman Mineralоgical Museum, Russian Academy of Science
Geological Setting of Type Material:
quartz boulder
Associated Minerals at Type Locality:

Synonyms of FaizieviteHide

Other Language Names for FaizieviteHide

Simplified Chinese:氟硅钛钙锂石

Relationship of Faizievite to other SpeciesHide

Structurally related to group(s):
Osumilite GroupA complex group of ring silicates; also known as "milarite group" (synonymous).

Related Minerals - Nickel-Strunz GroupingHide

9.CM.05ArmeniteBaCa2Al6Si9O30 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pnna
9.CM.05Brannockite(K,Na)□2Li3(Sn,Zr,Ti)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05ChayesiteK(Mg,Fe)4FeSi12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05DarapiositeK(Na,◻,K)2(Li,Zn,Fe)3(Mn,Zr,Y)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05EifeliteKNa3Mg4Si12O30Hex.
9.CM.05Merrihueite(K,Na)2(Fe,Mg)5Si12O30Hex.
9.CM.05MilariteK2Ca4Al2Be4Si24O60 · H2OHex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05Osumilite-(Mg)KMg2Al3(Al2Si10)O30 Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05Osumilite(K,Na)(Fe2+,Mg)2(Al,Fe3+)3(Si,Al)12O30Hex.
9.CM.05PoudretteiteKNa2B3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05Roedderite(Na,K)2(Mg,Fe)5Si12O30Hex. 6 m2 : P62c
9.CM.05SogdianiteK(□,Na)2Li3(Zr,Fe,Ti)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05SugiliteK(Na,□)2Li3(Fe,Mn,Al,Zr)2[Si12O30]Hex.
9.CM.05Yagiite(Na,K)3Mg4(Al,Mg)6(Si,Al)24O60Hex. 6/mmm (6/m 2/m 2/m)
9.CM.05BerezanskiteK□2Li3(Ti,Zr,Sn)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05DusmatoviteK(Na,□)2(Zn,Li)3(Mn2+,Y,Zr)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05ShibkoviteK(□,K,Na)2Zn3Ca2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05AlmaruditeK(□,Na)2(Mn2+,Fe2+,Mg)2(Be,Al)3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm
9.CM.05Trattnerite□(Fe3+,Mg,Fe2+)2(Mg,Fe2+,Fe3+)3(Si12O30)Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05OftedaliteK(Sc,Ca,Mn2+)22[(Be,Al)3Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc

Fluorescence of FaizieviteHide

In shortwave ultraviolet light, it has a bright white luminescence; in longwave ultraviolet light, it does not luminesce.

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 FaizieviteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Agakhanov A A, Pautov L A, Uvarova Y A, Sokolova E V, Hawthorne F C, Karpenko V Y, Gafurov F G (2007) Faizievite, K2Na(Ca6Na)Ti4Li6Si24O66F2 - a new mineral species. New Data on Minerals. Moscow 42, 5-10

Internet Links for FaizieviteHide

Localities for FaizieviteHide

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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - 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.
Tajikistan (TL)
 
  • Region of Republican Subordination
    • Tien Shan Mtn
      • Alai Range (Alayskiy)
IMA Website; Agakhanov A.A., Pautov L.A., Karpenko V.Yu., Bekenova G.K., Uvarova Y.A. (2011) Orlovite, KLi2 TiSi4 O11F, a new mineral of the mica group New Mineral Data 46:13-19
Mineral and/or Locality  
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