Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsBooks & Magazines
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryMineral Photography


This page is currently not sponsored. Click here to sponsor this page.
Hide all sections | Show all sections

About FedoriteHide

Evgraf Stepanovich Fedorov
(Na,K)2-3(Ca4Na3)Si16O38(OH,F)2 · 3.5H2O
White, colorless, bright red, raspberry red
Sub-Vitreous, Pearly
Specific Gravity:
2.43 - 2.58
Crystal System:
Member of:
Named in 1968 by A. A. Kukharenko, M. P. Orlova, and A. G. Bulakh in honor of mathematician, crystallographer, and mineralogist Evgraf Stepanovich Fedorov [December 22, 1853 Orenberg, Russia - May 21, 1919 St. Petersburg, Russia]. Fedorov was very interested in group theory and proved important concepts involved in polytypism and wallpaper theory later used in solving crystal structures.
Isostructural with:
A white micaceous mineral.

Structurally related to Reyerite Group.

Classification of FedoriteHide


9 : SILICATES (Germanates)
E : Phyllosilicates
E : Single tetrahedral nets of 6-membered rings connected by octahedral nets or octahedral bands

73 : PHYLLOSILICATES Condensed Tetrahedral Sheets
1 : Condensed Tetrahedral Sheets with double layers

16 : Silicates Containing Aluminum and other Metals
10 : Aluminosilicates of Ca and alkalis

Physical Properties of FedoriteHide

Sub-Vitreous, Pearly
Transparent, Translucent
White, colorless, bright red, raspberry red
2.43 - 2.58 g/cm3 (Measured)    2.43 g/cm3 (Calculated)

Optical Data of FedoriteHide

Biaxial (-)
RI values:
nα = 1.522 nβ = 1.530 nγ = 1.531
Measured: 32° , Calculated: 38°
Max Birefringence:
δ = 0.009
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
r < v distinct
Optical Extinction:
X = c, Y = b, Z = a

Chemical Properties of FedoriteHide

(Na,K)2-3(Ca4Na3)Si16O38(OH,F)2 · 3.5H2O
IMA Formula:
(K,Na)2.5(Ca,Na)7Si16O38(OH,F)2 · 3.5H2O

Crystallography of FedoriteHide

Crystal System:
Class (H-M):
1 - Pinacoidal
Space Group:
Cell Parameters:
a = 9.676 Å, b = 16.706 Å, c = 13.233 Å
α = 93.35°, β = 114.96°, γ = 90.03°
a:b:c = 0.579 : 1 : 0.792
Unit Cell V:
1,935.23 ų (Calculated from Unit Cell)
Platy micaceous aggregates

X-Ray Powder DiffractionHide

Powder Diffraction Data:
11.7 Å(80)
7.9 Å(20b)
6.0 Å(80)
4.67 Å(30b)
4.38 Å(10)
4.21 Å(70)
4.00 Å(60)
3.85 Å(20)
3.78 Å(10)
3.65 Å(10)
3.56 Å(20)
3.35 Å(40b)
3.24 Å(10)
3.13 Å(80b)
3.04 Å(40)
2.97 Å(90)
2.03 Å(100b)
2.80 Å(40)
2.74 Å(20)
2.67 Å(30)
2.60 Å(60b)
2.42 Å(40)
2.36 Å(30)
2.32 Å(10)
2.26 Å(50)
2.09 Å(30b)
2.02 Å(10)
1.981 Å(50)
1.956 Å(10)
1.915 Å(30)
1.873 Å(10)
1.826 Å(90b)
1.800 Å(20)
1.745 Å(40)
1.722 Å(10)
1.698 Å(20)
1.674 Å(10)
1.657 Å(30)
1.642 Å(10)
1.615 Å(30)
1.596 Å(20)
1.580 Å(30)
1.542 Å(40)
1.485 Å(60)
1.469 Å(10)
1.443 Å(40)
1.373 Å(20)
1.338 Å(50b)
1.322 Å(20)
1.300 Å(30)
1.286 Å(10)
1.275 Å(10)
1.259 Å(30)
1.204 Å(10)
1.186 Å(30)
1.173 Å(20)
1.148 Å(60)
1.137 Å(10)
1.129 Å(30)
ICDD 19-466 and ICDD 19-466a

Type Occurrence of FedoriteHide

Geological Setting of Type Material:
Fenitized sandstone
Associated Minerals at Type Locality:

Other Language Names for FedoriteHide


Relationship of Fedorite to other SpeciesHide

Member of:
Other Members of this group:
Martinite(Na,◻,Ca)12Ca4(Si,S,B)14B2O38(OH,Cl)2F2·4H2OTric. 1 : P1
Structurally related to group(s):

Common AssociatesHide

Associated Minerals Based on Photo Data:
14 photos of Fedorite associated with Charoite(K,Sr)15-16(Ca,Na)32[Si6O11(O,OH)6]2[Si12O18(O,OH)12]2[Si17O25(O,OH)18]2(OH,F)4 · ~3H2O
7 photos of Fedorite associated with AegirineNaFe3+Si2O6
7 photos of Fedorite associated with TinaksiteK2Na(Ca,Mn2+)2TiO[Si7O18(OH)]
4 photos of Fedorite associated with AgrelliteNaCa2Si4O10F
3 photos of Fedorite associated with PectoliteNaCa2Si3O8(OH)
2 photos of Fedorite associated with DigeniteCu9S5
2 photos of Fedorite associated with MicroclineK(AlSi3O8)

Related Minerals - Nickel-Strunz GroupingHide

9.EE.10BrokenhilliteMn8Si6O15(OH)10Hex. 6mm : P63mc
9.EE.10Pyrosmalite-(Fe)Fe2+8Si6O15(OH,Cl)10Trig. 3m (3 2/m) : P3m1
9.EE.10FriedeliteMn2+8Si6O15(OH,Cl)10Mon. 2/m : B2/m
9.EE.10Mcgillite(Mn,Fe)8Si6O15(OH)8Cl2Mon. 2/m : B2/m
9.EE.15SchalleriteMn2+16As3Si12O36(OH)17Trig. 3m : P3m1
9.EE.20Palygorskite(Mg,Al)5(Si,Al)8O20(OH)2 · 8H2OMon. 2/m : B2/m
9.EE.20TuperssuatsiaiteNa2(Fe3+,Mn2+)3Si8O20(OH)2 · 4H2OMon. 2/m : B2/m
9.EE.20YofortieriteMn5Si8O20(OH)2 · 8-9H2OMon. 2/m : B2/m
9.EE.20WindhoekiteCa2Fe3+2.67[Si8O20](OH)4 · 10H2O Mon. 2/m : B2/m
9.EE.25Falcondoite(Ni,Mg)4Si6O15(OH)2 · 6H2OOrth.
9.EE.25LoughliniteNa2Mg3Si6O16 · 8H2OOrth.
9.EE.25SepioliteMg4(Si6O15)(OH)2 · 6H2OOrth. mmm (2/m 2/m 2/m) : Pnna
9.EE.25Kalifersite(K,Na)5Fe3+7Si20O50(OH)6 · 12H2OTric.
9.EE.30GyroliteNaCa16Si23AlO60(OH)8 · 14H2OTric. 1 : P1
9.EE.30OrlymaniteCa4Mn3Si8O20(OH)6 · 2H2OHex.
9.EE.30TungusiteCa4Fe2Si6O15(OH)6Tric. 1 : P1
9.EE.35Reyerite(Na,K)2Ca14(Si,Al)24O58(OH)8 · 6H2OTrig.
9.EE.35Truscottite(Ca,Mn)14Si24O58(OH)8 · 2H2OTrig.
9.EE.45MakatiteNa2Si4O8(OH)2 · 4H2OMon. 2/m : P21/b
9.EE.50VarennesiteNa8Mn2Si10O25(OH,Cl)2 · 12H2OOrth.
9.EE.55RaiteNa4Mn2+3Ti0.25Si8O20(OH)2 · 10H2OOrth. 2 2 2 : C2 2 2
9.EE.60IntersiliteNa6Mn2+Ti[Si10O24(OH)](OH)3 · 4H2OMon.
9.EE.65ShafranovskiteNa3K2(Mn,Fe,Na)4[Si9(O,OH)27](OH)2 · nH2OTrig.
9.EE.65ZakharoviteNa4Mn5Si10O24(OH)6 · 6H2OTrig.
9.EE.70ZeophylliteCa13Si10O28(OH)2F8 · 6H2OTrig. 3 : R3
9.EE.80Martinite(Na,◻,Ca)12Ca4(Si,S,B)14B2O38(OH,Cl)2F2·4H2OTric. 1 : P1
9.EE.85Lalondeite(Na,Ca)6(Ca,Na)3Si16O38(F,OH)2·3H2OTric. 1 : P1

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

16.10.4Thomsonite-CaNaCa2[Al5Si5O20] · 6H2OOrth. mmm (2/m 2/m 2/m)
16.10.5Gonnardite(Na,Ca)2(Si,Al)5O10 · 3H2OOrth.
16.10.6MesoliteNa2Ca2Si9Al6O30 · 8H2OOrth. mm2 : Fdd2
16.10.8Garronite-CaNa2Ca5Al12Si20O64 · 27H2OTet. 4 2m : I4m2
16.10.9BoggsiteCa8Na3(Si,Al)96O192 · 70H2OOrth. mmm (2/m 2/m 2/m) : Imma
16.10.10Herschelite(Na2,K2,Ca,Sr,Mg)2[Al2Si4O12]2 · 12H2OTrig.
16.10.13WillhendersoniteKCa[Al3Si3O12] · 5H2OTric.
16.10.14Barrerite(Na,K,Ca0.5)2[Al2Si7O18] · 7H2OOrth. mmm (2/m 2/m 2/m)
16.10.15Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2OOrth.
16.10.16Reyerite(Na,K)2Ca14(Si,Al)24O58(OH)8 · 6H2OTrig.
16.10.20GobbinsiteNa5(Si11Al5)O32 · 11H2OOrth.
16.10.21Stilbite subgroup
16.10.23OffretiteKCaMg(Si13Al5)O36 · 15H2OHex. 6 m2 : P6m2
16.10.24PerlialiteK9Na(Ca,Sr)[Al2Si4O12]6 · 15H2OHex.
16.10.27Sodium Dachiardite(Na2,Ca,K2)4-5Al8Si40O96 · 26H2O
16.10.28Mazzite-Mg(Mg,K,Ca)5(Si26Al10)O72 · 28H2OHex.
16.10.29RoggianiteCa2Be(OH)2Al2Si4O13 · 2.5H2OTet.

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 FedoriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
A. A. Kukharenko, M. P. Orlova, and A. G. Bulakh (1965) The Caledonian Ultrabasic Alkalic Rocks and Carbonates of the Kola Peninsula and Northern Karelia, Izd. Nedra, p. 479-481 (in Russian).
American Mineralogist: 52: 561-2.
Soviet Physics – Crystallography: 28: 95-96.
Sokolova, G. V., Kashaev, A. A., Drits, V. A., and Ilyukhin, V. V. (1983) The Crystal Structure of Fedorite, Kristallografiya (Soviet Physics - Crystallography), v. 28, p. 170-172 (in Russian).
Soviet Physics – Crystallography: 33: 763-765.
Canadian Mineralogist: 39: 769-777.

Internet Links for FedoriteHide

Localities for FedoriteHide

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.
  • Rhineland-Palatinate
    • Ahrweiler
      • Brohltal
        • Brenk
Blass, G., Graf, H.W., Kolitsch,U., Sebold, D., Neue Funde aus der Vulkaneifel, Mineralien-Welt 3/2004
Russia (TL)
  • Murmansk Oblast
    • Turii Cape
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
  • Sakha Republic (Yakutia)
    • Aldan Shield
      • Chara and Tokko Rivers Confluence
[Lapis 1993:4 p.13-20]
Konev, A.A., Vorob'yev, E.I., and Lazebnik, K.A. (1996) The Mineralogy of the Murun Massif. Russian Academy of Science Press, Siberian Branch, Novosbirsk, Russia (in Rus.)
Solyanik, V. A., Pakhomova, V. A., & Ushkova, M. A. (2008). Charoite–a champion among mineralogical discoveries in the second half of the 20th century. The Journal of the Gemmological Association of Hong Kong, 29, 77-80.
Konev, A.A., Vorob'yev, E.I., and Lazebnik, K.A. (1996) The Mineralogy of the Murun Massif. Russian Academy of Science Press, Siberian Branch, Novosbirsk, Russia (in Rus.)
Pavel M. Kartashov data
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2020, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: February 24, 2020 00:17:39 Page generated: February 13, 2020 12:23:37
Go to top of page