Mineralogy Database

Filatovite Mineral Data

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General Filatovite Information

Help on Chemical  Formula: Chemical Formula: K[(Al,Zn)2(As,Si)2O8]
Help on Composition: Composition: Molecular Weight = 340.02 gm
   Potassium   10.58 %  K    12.74 % K2O
   Sodium       0.47 %  Na    0.64 % Na2O
   Aluminum    14.36 %  Al   27.14 % Al2O3
   Zinc         3.08 %  Zn    3.83 % ZnO
   Iron         0.16 %  Fe    0.21 % FeO
   Copper       0.75 %  Cu    0.94 % CuO
   Silicon      5.78 %  Si   12.37 % SiO2
   Arsenic     26.44 %  As   40.56 % As2O5
   Phosphorus   0.73 %  P     1.67 % P2O5
   Oxygen      37.64 %  O
              ______        ______ 
              100.00 %      100.09 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K0.92Na0.07Al1.81Zn0.16Cu0.04Fe2+0.01As1.2Si0.7P0.08O8
Help on Environment: Environment: A product of fumarolic activity. Gas temperatures in the fumarole were ~410 to 420° C. As-dominant Feldspar group; structure determined.
Help on IMA Status: IMA Status: Approved IMA 2004 (Dana # Added)
Help on Locality: Locality: The second cinder cone of the North Breach of Great fissure Tolbachik eruption (GFTE), Kamchatka Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Stanislav K. Filatov (b. 1940), Professor, Department of Crystallography, St. Petersburg State University, St. Petersburg, Russia.
Help on Synonym: Synonym: IMA2002-052

Filatovite Image

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Comments: Colorless prismatic single crystal embedded in epoxy, co-type material.
Location: Great Tolbachik Eruption (1976), Tolbachik Volcano, Kamchatka Peninsula, Russia. Scale: See Image.
© Rruff Database

Filatovite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.656:1:1.0987
Help on Cell Dimensions: Cell Dimensions: a = 8.772, b = 13.37, c = 14.69, Z = 8; beta = 115.994° V = 1,548.58 Den(Calc)= 2.92
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: I2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.364(1)(220,204,040), 3.897(0.7)(130), 4.329(0.7)(202), 2.981(0.6)(042), 3.3(0.5)(004), 2.646(0.4)(242), 3.066(0.4)(132),

Physical Properties of Filatovite

Help on Cleavage: Cleavage: {100} Good
Help on Color: Color: Colorless.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 5-6 - Between Apatite and Orthoclase
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Filatovite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.01 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1831,KC= 0.1849
Ncalc = 1.54
Help on Optical Data: Optical Data: Biaxial (-), a=1.532, b=1.535, g=1.537, bire=0.0050

Calculated Properties of Filatovite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.79 gm/cc
note: Specific Gravity of Filatovite =2.92 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0041899769
Boson Index = 0.9958100231
Help on Photoelectric: Photoelectric: PEFilatovite = 21.61 barns/electron
U=PEFilatovite x relectron= 60.34 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 145.97 (Gamma Ray American Petroleum Institute Units)
Concentration of Filatovite per GRapi unit = 0.69 (%)

Estimated Radioactivity from Filatovite - barely detectable


Filatovite Classification

Help on  Dana Class: Dana Class: (76)Tectosilicate Al-Si Framework
  (76.01)with Al-Si frameworks
  (76.01.01)K (Na,Ba) feldspars Orthoclase KAlSi3O8 C 2/m 2/m Sanidine (K,Na)(Si,Al)4O8 C 2/m 2/m Hyalophane (K,Ba)Al(Si,Al)3O8 C 2/m 2/m Celsian BaAl2Si2O8 I21/c 2/m Microcline KAlSi3O8 C1 1 Anorthoclase (Na,K)AlSi3O8 C1 1 Rubicline! (Rb,K)AlSi3O8 P1 1 Filatovite! K[(Al,Zn)2(As,Si)2O8] I2/c 2/m
Help on  Strunz Class: Strunz Class: 08.AC.85 08 - PHOSPHATES, ARSENATES, VANADATES
  08.A - Phosphates, etc. without additional anions, without H2O
  08.AC -With medium-sized and large cations
08.AC.85 Filatovite! K[(Al,Zn)2(As,Si)2O8] I2/c 2/m

Other Filatovite Information

Help on References: References: NAME( CanMin, 42:1907) PHYS. PROP.(CanMin, 42:1907) OPTIC PROP.(CanMin, 42:1907)
Help on See Also: See Also: Links to other databases for Filatovite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 08.AC.85





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