Filatovite
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Formula:
K(Al,Zn)2(As,Si)2O8
Colour:
colourless
Lustre:
Vitreous
Hardness:
5 - 6
Specific Gravity:
2.92 (Calculated)
Crystal System:
Monoclinic
Member of:
Name:
For Prof. Stanislav K. Filatov (1940– ) Department of Crystallography, St. Petersburg State University, St Petersburg, Russia, for his contributions to high temperature crystal chemistry and crystal chemistry of exhalation minerals.
Arsenate (V) analogue of orthoclase.
Chemically similar especially to wrightite and also to pharmacoalumite.
Chemically similar especially to wrightite and also to pharmacoalumite.
Classification of Filatovite
Approved
Approval Year:
2002
8/J.06-45
8.AC.85
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
C : With medium-sized and large cations
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
C : With medium-sized and large cations
Physical Properties of Filatovite
Vitreous
Transparency:
Transparent
Colour:
colourless
Streak:
White
Hardness:
5 - 6 on Mohs scale
Hardness Data:
Measured
Tenacity:
Brittle
Cleavage:
Distinct/Good
on {100}
on {100}
Density:
2.92 g/cm3 (Calculated)
Chemical Properties of Filatovite
Formula:
K(Al,Zn)2(As,Si)2O8
Crystallography of Filatovite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 8.772 Å, b = 13.37 Å, c = 14.69 Å
β = 115.944°
β = 115.944°
Ratio:
a:b:c = 0.656 : 1 : 1.099
Unit Cell V:
1549.1 ų
Z:
8
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.664 | (100) |
4.329 | (70) |
3.897 | (70) |
2.981 | (60) |
3.300 | (50) |
Comments:
From type-description.
Type Occurrence of Filatovite
General Appearance of Type Material:
prismatic crystals to 0.3 mm
Place of Conservation of Type Material:
Museum of the Department of Mineralogy, St.Petersburg State University, St. Petersburg, Russia (catalogue # 1/19086)
Geological Setting of Type Material:
In pockets of fumarolic activity
Associated Minerals at Type Locality:
Synonyms of Filatovite
Other Language Names for Filatovite
Relationship of Filatovite to other Species
Member of:
Other Members of this group:
Albite | Na(AlSi3O8) | Tric. 1 |
Amazonite | K(AlSi3O8) | |
Andesine | (Na,Ca)[Al(Si,Al)Si2O8] | Tric. |
Anorthite | Ca(Al2Si2O8) | Tric. 1 : P1 |
Anorthoclase | (Na,K)AlSi3O8 | Tric. |
Banalsite | Na2BaAl4Si4O16 | Orth. |
Buddingtonite | (NH4)(AlSi3)O8 | Mon. 2 : P21 |
Bytownite | (Ca,Na)[Al(Al,Si)Si2O8] | Tric. |
Celsian | Ba(Al2Si2O8) | Mon. 2/m |
Dmisteinbergite | Ca(Al2Si2O8) | Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm |
Hexacelsian | BaAl2Si2O8 | Hex. 6/mmm (6/m 2/m 2/m) : P63/mcm |
Hyalophane | (K,Ba)[Al(Si,Al)Si2O8] | Mon. |
Kokchetavite | K(AlSi3O8) | Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm |
Kumdykolite | Na(AlSi3O8) | Orth. mmm (2/m 2/m 2/m) : Pnnm |
Labradorite | (Ca,Na)[Al(Al,Si)Si2O8] | |
Microcline | K(AlSi3O8) | Tric. 1 |
Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] | |
Orthoclase | K(AlSi3O8) | Mon. 2/m : B2/m |
Paracelsian | Ba(Al2Si2O8) | Mon. |
Reedmergnerite | NaBSi3O8 | Tric. |
Rubicline | Rb(AlSi3O8) | Tric. |
Sanidine | K(AlSi3O8) | Mon. 2/m : B2/m |
Slawsonite | Sr(Al2Si2O8) | Mon. |
Stronalsite | Na2SrAl4Si4O16 | Orth. |
Sunstone | A variety of feldspar (microcline or oligoclase, more rarely labradorite) that has schiller, ... | |
Svyatoslavite | Ca(Al2Si2O8) | Orth. |
Related Minerals - Nickel-Strunz Grouping
8.AC. | Wopmayite | Ca6Na3□Mn(PO4)3(PO3OH)4 | Trig. 3m : R3c |
8.AC.05 | Howardevansite | NaCuFe2(VO4)3 | Tric. 1 : P1 |
8.AC.10 | Alluaudite | (Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3 | Mon. |
8.AC.10 | Arseniopleite | (Ca,Na)NaMn2+(Mn2+,Mg,Fe2+)2(AsO4)3 | Mon. 2/m : P2/b |
8.AC.10 | Caryinite | (Na,Pb)(Ca,Na)CaMn2+2(AsO4)3 | Mon. 2/m |
8.AC.10 | Ferroalluaudite | (Na,Ca)Fe2+(Fe3+,Mn2+,Fe2+)2(PO4)3 | |
8.AC.10 | Hagendorfite | NaCaMn2+Fe2+2(PO4)3 | Mon. 2/m : B2/b |
8.AC.10 | Johillerite | Na(Mg,Zn)3Cu(AsO4)3 | Mon. 2/m : B2/b |
8.AC.10 | Maghagendorfite | (□,Na,)(Na,Ca,Fe2+)Mn(Mg,Fe2+,Fe3+)3(PO4)3 | Mon. |
8.AC.10 | Nickenichite | Na0.8Ca0.4Cu0.4(Mg,Fe)3(AsO4)3 | Mon. 2/m : B2/b |
8.AC.10 | Varulite | NaCaMn2+Mn2+2(PO4)3 | Mon. 2/m : B2/b |
8.AC.10 | Ferrohagendorfite | NaCaFe2+Fe2+2(PO4)3 | Mon. |
8.AC.10 | Bradaczekite | NaCu4(AsO4)3 | Mon. 2/m : B2/b |
8.AC.10 | Yazganite | NaFe3+2(Mg,Mn2+)(AsO4)3 · H2O | Mon. 2/m : B2/b |
8.AC.10 | Groatite | NaCaMn2(PO4)(HPO4)2 | Mon. 2/m : B2/b |
8.AC.15 | Bobfergusonite | Na2Mn5FeAl(PO4)6 | Mon. 2/m : P2/b |
8.AC.15 | Ferrowyllieite | (Na,Ca,Mn)(Fe,Mn)(Fe,Fe,Mg)Al(PO4)3 | Mon. 2/m : P21/b |
8.AC.15 | Qingheiite | NaMn3+Mg(Al,Fe3+)(PO4)3 | Mon. 2/m : P21/b |
8.AC.15 | Rosemaryite | (Na,Ca,Mn)(Mn,Fe2+)(Fe3+,Mg)Al(PO4)3 | Mon. 2/m : P21/b |
8.AC.15 | Wyllieite | (Na,Ca,Mn)(Mn,Fe)(Fe,Mg)Al(PO4)3 | Mon. 2/m |
8.AC.15 | Ferrorosemaryite | ◻NaFe2+Fe3+Al(PO4)3 | Mon. |
8.AC.15 | Qingheiite-(Fe2+) | Na2Fe2+MgAl(PO4)3 | Mon. 2/m : P21/m |
8.AC.18 | Manitobaite | Na16Mn2+ 25Al8(PO4)30 | Mon. m : Pb |
8.AC.20 | Marićite | NaFe2+(PO4) | Orth. mmm (2/m 2/m 2/m) : Pmna |
8.AC.25 | Berzeliite | (NaCa2)Mg2(AsO4)3 | Iso. m3m (4/m 3 2/m) : Ia3d |
8.AC.25 | Manganberzeliite | NaCa2Mn2+2(AsO4)3 | Iso. m3m (4/m 3 2/m) : Ia3d |
8.AC.25 | Palenzonaite | (Ca,Na)3CaMn2+2(VO4)3 | Iso. m3m (4/m 3 2/m) : Ia3d |
8.AC.25 | Schäferite | Ca2NaMg2(VO4)3 | Iso. |
8.AC.30 | Brianite | Na2CaMg(PO4)2 | Mon. 2/m : P21/b |
8.AC.35 | Vitusite-(Ce) | Na3(Ce,La,Nd)(PO4)2 | Orth. mm2 : Pca21 |
8.AC.40 | Olgite | (Sr,Ba)(Na,Sr,REE)2Na(PO4)2 | Trig. 3m (3 2/m) : P3m1 |
8.AC.40 | Bario-olgite | (Ba,Sr)(Na,Sr,REE)2Na(PO4)2 · | Trig. 3 : P3 |
8.AC.45 | Strontiowhitlockite | Sr9Mg(PO4)6(HPO4) | Trig. 3m : R3c |
8.AC.45 | Whitlockite | Ca9Mg(PO4)6(HPO4) | Trig. 3m : R3c |
8.AC.45 | Merrillite | Ca9NaMg(PO4)7 | Trig. 3m : R3m |
8.AC.45 | Tuite | Ca3(PO4)2 | Trig. 3m (3 2/m) : R3m |
8.AC.45 | Ferromerrillite | Ca9NaFe2+(PO4)7 | Trig. 3m : R3c |
8.AC.50 | Chladniite | {Ca}{Na8}{Ca4Na4}{(Mg,Fe2+)43}(PO4)36 | Trig. 3 : R3 |
8.AC.50 | Fillowite | {Mn2+}{Na8}{Ca4Na4}{(Mn2+,Fe2+)43}(PO4)36 | Trig. 3 : R3 |
8.AC.50 | Johnsomervilleite | Na10Ca6Mg18Fe25(PO4)36 | Trig. |
8.AC.50 | Galileiite | {Fe2+}{Na8}{Fe2+4Na4}{Fe2+43}(PO4)36 | Trig. 3 : R3 |
8.AC.50 | Stornesite-(Y) | {(Y, Ca)}{Na6◻2}{(Ca,Na)8}{(Mg,Fe2+)43}(PO4)36 | Trig. 3 : R3 |
8.AC.50 | Xenophyllite | Na4Fe2+7(PO4)6 | Tric. 1 : P1 |
8.AC.55 | Harrisonite | Ca(Fe2+,Mg)6(PO4)2(SiO4)2 | Trig. |
8.AC.60 | Kosnarite | KZr2(PO4)3 | Trig. 3m (3 2/m) : R3c |
8.AC.65 | Panethite | (Na,Ca)2(Mg,Fe2+)2(PO4)2 | Mon. 2/m : P21/b |
8.AC.70 | Stanfieldite | Ca4Mg5(PO4)6 | Mon. |
8.AC.75 | Ronneburgite | K2MnV4O12 | Mon. 2/m |
8.AC.80 | Tillmannsite | (Ag3Hg)(VO4,AsO4) | Tet. 4 : I4 |
Fluorescence of Filatovite
none
Other Information
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 Filatovite
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Vergasova, L.P., Krivovichev, S.V., Britvin, S.N., Burns, P.C., and Ananiev, V.V. (2004) Filatovite, K[(Al,Zn)2(As,Si)2O8], a new mineral species from the Tolbachik volcano, Kamchatka peninsula, Russia. European Journal of Mineralogy: 16(3): 533-536.
Filatov, S.K., Krivovichev, S.V., Burns, P.C., and Vergasova L.P. (2004) Crystal structure of filatovite, K[(Al,Zn)2(As,Si)2O8], the first arsenate of the feldspar group. European Journal of Mineralogy: 16(3): 537-543.
Internet Links for Filatovite
mindat.org URL:
https://www.mindat.org/min-26577.html
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Localities for Filatovite
Locality List




All localities listed without proper references should be considered as questionable.
Russia (TL) | |
| Vergasova, L.P., Krivovichev, S.V., Britvin, S.N., Burns, P.C., and Ananiev, V.V. (2004) Filatovite, K[(Al,Zn)2(As,Si)2O8], a new mineral species from the Tolbachik volcano, Kamchatka peninsula, Russia. European Journal of Mineralogy: 16(3): 533-536. |