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Uranpyrochlore (of Hogarth 1977)

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Tazheranskii Massif, Lake Baikal area, Irkutskaya Oblast', Prebaikalia (Pribaikal'e), Eastern-Siberian Region, Russia
© Pavel M. Kartashov

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Formula:
(U,Ca,Ce)
 
2
(Nb,Ta)
 
2
O
 
6
(OH,F)
System:IsometricColour:Red, Red-brown, ...
Lustre:Adamantine, ResinousHardness:4 - 5
Name:The name reflects its uranium content and similarity to pyrochlore.


Pyrochlore Group. Pyrochlore Subgroup. The uranium analogue of the other members of the Pyrochlore Subgroup.
Uranpyrochlore was discredited by Atencio et al. (2010). The samples named as uranpyrochlore in previous litterature are not fullfilling the conditions according to the new nomenclature of the pyrochlore supergroup to be name as a uranpyrochlore

Classification of Uranpyrochlore (of Hogarth 1977)

IMA status:Discredited 2010
Strunz 8th edition ID:4/C.17-90
Nickel-Strunz 10th (pending) edition ID:4.DH.15

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
H : With large (+- medium-sized) cations; sheets of edge-sharing octahedra
Dana 8th edition ID:8.2.1.7

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
2 : A2B2O6(O,OH,F)
Hey's CIM Ref.:18.4.1

18 : Niobates and Tantalates
4 : Niobates and tantalates containing both U and rare earths
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Type Occurrence of Uranpyrochlore (of Hogarth 1977)

Type Locality:Mitchell Co., North Carolina, USA
Year of Discovery:1877

Physical Properties of Uranpyrochlore (of Hogarth 1977)

Lustre:Adamantine, Resinous
Colour:Red, Red-brown, chocolate-brown to black, amber-yellow
Hardness (Mohs):4 - 5

Crystallography of Uranpyrochlore (of Hogarth 1977)

Crystal System:Isometric
Cell Parameters:a = 10.44Å
Unit Cell Volume:V 1,137.89 ų (Calculated from Unit Cell)

Optical Data of Uranpyrochlore (of Hogarth 1977)

Type:Isotropic

Chemical Properties of Uranpyrochlore (of Hogarth 1977)

Formula:
(U,Ca,Ce)
 
2
(Nb,Ta)
 
2
O
 
6
(OH,F)
Essential elements:H, Nb, O, U
All elements listed in formula:Ca, Ce, F, H, Nb, O, Ta, U

Relationship of Uranpyrochlore (of Hogarth 1977) to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.DH.05Brannerite
(U
4+
 
,REE,Th,Ca)(Ti,Fe
3+
 
,Nb)
 
2
(O,OH)
 
6
4.DH.05Orthobrannerite
U
4+
 
U
6+
 
Ti
 
4
O
 
12
(OH)
 
2
4.DH.05Thorutite
(Th,U,Ca)Ti
 
2
(O,OH)
 
6
4.DH.10Kassite
CaTi
 
2
O
 
4
(OH)
 
2
4.DH.10Lucasite-(Ce)
CeTi
 
2
(O,OH)
 
6
4.DH.15Bariomicrolite (of Hogarth 1977)
4.DH.15Bariopyrochlore (of Hogarth 1977)
4.DH.15Betafite (of Hogarth 1977)
4.DH.15Bismutomicrolite (of Hogarth 1977)
4.DH.15Calciobetafite (of Mazzi & Munno)
4.DH.15Ceriopyrochlore (of Hogarth 1977)
4.DH.15Cesstibtantite
4.DH.15Jixianite
Pb(W,Fe
3+
 
)
 
2
(O,OH)
 
7
4.DH.15Hydropyrochlore
(H
 
2
O,□)
 
2
Nb
 
2
(O,OH)
 
6
(H
 
2
O)
4.DH.15Natrobistantite
4.DH.15Plumbopyrochlore (of Skorobogatova et al.)
4.DH.15Plumbomicrolite (of Hogarth 1977)
4.DH.15Plumbobetafite (of Hogarth 1977)
4.DH.15Stibiomicrolite (of Groat et al.)
4.DH.15Strontiopyrochlore (of Hogarth 1977)
4.DH.15Stannomicrolite (of Hogarth 1977)
4.DH.15Stibiobetafite (of Černý et al.)
4.DH.15Yttrobetafite (of Hogarth 1977)
4.DH.15Yttropyrochlore (of Hogarth 1977)
4.DH.15Fluornatromicrolite
(Na,Ca,Bi)
 
2
Ta
 
2
O
 
6
F
4.DH.15Bismutopyrochlore (of Chukanov et al.)
4.DH.15Hydrokenoelsmoreite
◻
 
2
W
 
2
O
 
6
(H
 
2
O)
4.DH.20Bismutostibiconite
Bi(Sb
5+
 
,Fe
3+
 
)
 
2
O
 
7
4.DH.20Oxyplumboroméite
Pb
 
2
Sb
 
2
O
 
6
O
4.DH.20Monimolite
4.DH.20Cuproroméite
Cu
 
2
Sb
 
2
(O,OH)
 
7
4.DH.20Stetefeldtite
Ag
 
2
Sb
 
2
(O,OH)
 
7
4.DH.20Stibiconite
4.DH.25Rosiaite
PbSb
5+
2
O
 
6
4.DH.30Zirconolite
CaZrTi
 
2
O
 
7
4.DH.35Liandratite
U(Nb,Ta)
 
2
O
 
8
4.DH.35Petscheckite
UFe(Nb,Ta)
 
2
O
 
8
4.DH.40Ingersonite
Ca
 
3
MnSb
 
4
O
 
14
4.DH.45Pittongite
Na
 
0.22
(W,Fe
3+
 
)(O,OH)
 
3
 · 0.44H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
18.4.2Yttrocolumbite-(Y)
Y(U
4+
 
,Fe
2+
 
)Nb
 
2
O
 
8
18.4.3Yttrotantalite-(Y)
(Y,Ca,U
4+
 
,Fe
2+
 
)
 
2
(Ta,Nb)
 
2
O
 
8
18.4.4Ishikawaite
U
4+
 
Fe
2+
 
Nb
 
2
O
 
8
18.4.5Euxenite-(Y)
(Y,Ca,Ce,U,Th)(Nb,Ti,Ta)
 
2
O
 
6
18.4.6Tanteuxenite-(Y)
(Y,Ce,Ca)(Ta,Nb,Ti)
 
2
(O,OH)
 
6
18.4.7Kobeite-(Y)
(Y,Zr)
 
2
(Ti,Fe
3+
 
)
 
2
(O,OH)
 
7
18.4.8Polycrase-(Y)
(Y,U)(Ti,Nb)
 
2
O
 
6
18.4.9Yttropyrochlore (of Hogarth 1977)
18.4.10Calciobetafite (of Mazzi & Munno)
18.4.11Yttrobetafite (of Hogarth 1977)
18.4.12Samarskite-(Y)
(Y,Fe
3+
 
,Fe
2+
 
,U,Th,Ca)
 
2
(Nb,Ta)
 
2
O
 
8

Other Names for Uranpyrochlore (of Hogarth 1977)

Synonyms:
EllsworthiteHatchettoliteUranopyrochlore
Other Languages:
German:Ellsworthit
Hatchettolit
Uranpyrochlor
Simplified Chinese:铀钽铌矿
Spanish:Ellsworthita
Hatchettolita
Varieties:
Samiresite

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Uranpyrochlore (of Hogarth 1977)

Reference List:

- +
Smith (1877): American Journal of Science. 13: 365.

Allen (1877): American Journal of Science. 14: 128.

Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 748.

Hogarth, D. D. (1977): Classification and nomenclature of the pyrochlore group. American Mineralogist. 62, 403-410.

Mineralogical Magazine (1989): 53: 257.

Atencio D., Andrade M.B., Christy A.G., Giere R., Kartashov P.M. (2010): The pyrochlore supergroup of minerals: nomenclature. Canadian Mineralogist, 48, 569-594

Internet Links for Uranpyrochlore (of Hogarth 1977)

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    • Localities for Uranpyrochlore (of Hogarth 1977)

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Afghanistan
     
    • Helmand Province (Hilmend Province; Hilmand Province)
      • Dushan District
        • Khanneshin complex
    		Orris, G.J., and Bliss, J.D. (2002): Mines and Mineral Occurrences of Afghanistan. United States Geological Survey Open-File Report 02-110
    Austria
     
    • Carinthia
      • Gurktaler Alpen
        • Gurk valley
          • Straßburg
    		G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
    Brazil
     
    • Amazonas
      • Presidente Figueiredo
        • Pitinga mine
    		A. C. Bastos Neto, V. P. Pereira, L. H. Ronchi, E. F. de Lima and J. C. Frantz (2009): The world-class Sn, Nb, Ta, F (Y, REE, Li) deposit and the massive cryolite associated with the albite-enriched facies of the Madeira A-type granite, Pitinga mining district, Amazonas State, Brazil. Canadian Mineralogist 47, 1329-1357.
    • Rio Grande do Norte
      • Borborema mineral province
        • Parelhas
    		[MinRec 29:196]
    • São Paulo
      • Cajati
    		[MinRec 15:266]
    Canada
     
    • British Columbia
      • Kamloops Mining Division
        • Blue River
          • Verity claim
    		Blue River Carbonatites, British Columbia- Primary Exploration Targets for Tantalum, G.J. Simandle,P.C. Jones, M. Rotella Exploration and Mining in British Columbia - 2001, B. C. Mines Report, pg 123-131 (http://www.commerceresources.com/i/pdf/05-BCGOVRREPORT.pdf)
    • Manitoba
      • Bird River Greenstone Belt
    		M. Masau, P. Cerny, M.A. Cooper, R. Chapman & J. Grice (2002) Can. Mineral. 40, 1649-1655
    • Ontario
      • Hastings Co.
        • Monteagle Township
    		[www.johnbetts-fineminerals.com]
    American Mineralogist 27:226; Hugh S. Spence (1930) Pegmatite minerals of Ontario and Quebec. American Mineralogist 15:430-450; Hewitt, D. F. (1967) Pegmatite Mineral Resources of Ontario. Geological Survey of Canada Industrial Mineral Report 21
    No reference listed
      • Nipissing District
        • Lake Nipissing
          • Manitou Islands
    		Berger, V.I., Singer, D.A., and Orris, G.J. (2009): USGS Open-File Report 09-1139
    • Québec
      • Laurentides
        • Deux-Montagnes RCM
          • Oka
            • Oka complex
    		ZUREVINSKI, S.E. AND MITCHELL, R.H. (2004) Extreme compositional variation of pyrochlore-group minerals at the Oka carbonatite complex, Canadian Mineralogist, 42, 1159-1168.
    ZUREVINSKI, S.E. AND MITCHELL, R.H. (2004) Extreme compositional variation of pyrochlore-group minerals at the Oka carbonatite complex, Canadian Mineralogist, 42, 1159-1168.
      • Nord-du-Québec
        • Baie-James
          • Otish Mts
    		SASSANO, G. & ROCHELEAU, M. (1987) Quelques minéraux d'uranium des Bassin d'Otish et de Mistassini, Québec. Canadian Mineralogist 25, 185-193.
    China
     
    • Liaoning Province (Manchuria; Dongbei Region)
      • Dandong Prefecture
        • Fengcheng Co.
          • Saima complex
    		Saima Deposit Research Group, Beijing Institute of Uranium Geology (1978): Scientia Sinica 11(3), 365-389
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • South Bohemia Region
        • Písek
    		Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)
    • Moravia (Mähren; Maehren)
      • Moravia-Silesia Region
        • Bruntál
          • Praded (Altvater)
    		Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)
      • Olomouc Region
        • Šumperk (Mährisch Schönberg)
          • Maršíkov (Marchendorf)
    		Novák, M.: Maršíkov - Scheibengraben. In Exkurzní průvodce po mineralogických lokalitách na Sobotínsku. Univerzita Palackého v Olomouci, 2002, Olomouc, s. 38-41.
      • South Moravia Region
        • Tišnov
          • Drahonín
    		Škoda, R., Novák, M.: Akcesorické Nb-Ta-Ti minerály z pegmatitu v uranovém dole Drahonín, strážecké moldanubikum. Acta Musei Moraviae, Scientiae geologicae, 2004, roč. 89, s. 55 - 66.
    Egypt
     
    • Red Sea Governorate
      • Eastern Desert
    		Mineral. Deposita 43 (2008) 933-944.
    France
     
    • Auvergne
      • Allier
        • Ébreuil
          • Échassières
    		Rucheng Wang, Fontan, F., and Monchoux, P. (1994): Acta Petrologica et Mineralogica 13(2)
    • Midi-Pyrénées
      • Hautes-Pyrénées
        • La Barthe-de-Neste
          • Avezac-Prat-Lahitte
    		MONCHOUX P., FONTAN F., DE PARSEVAL P., MARTIN R. F., WANG R. C. (2006) - Igneous albitite dikes in orogenic lherzolithes, Western Pyrénées, France: A possible source for corundum and alkali feldspar xenocrysts in basaltic terranes. I. Mineralogical Asssociations. The Canadian Mineralogist, Vol. 44, pp. 817-842.
    Germany
     
    • Baden-Württemberg
      • Kaiserstuhl
        • Schelingen
          • Orberg - Badberg area
    		Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
    • Bavaria
      • Upper Palatinate
        • Oberpfälzer Wald
          • Vohenstrauß
            • Waidhaus
              • Hagendorf
    		Keck, E., (1989): Uran im Pegmatit von Hagendorf-Süd, Der Aufschluss, Vol. 40, 269-290
    • Rhineland-Palatinate
      • Eifel
        • Gerolstein
          • Rockeskyll
            • Rockeskyll volcanic complex
    		Blass, G., Emmerich, F., Graf, HW., Schäfer, Ch., Tschörtner, J., (2006): Minerale der Eifelvulkane, Version 1.0, CD, published by authors
        • Laach lake volcanic complex
          • Kruft
    		Blass, G.; Graf, H.W., Neue Mineralienfunde aus der Vulkaneifel , Mineralien-Welt 12/1, 17-25, 2001
          • Mendig
            • Niedermendig
    		Blass, G.; Graf, H.W., Neue Mineralienfunde aus der Vulkaneifel, Mineralien-Welt 12/1, 17-25, 2001
    Blass, G.; Graf, H.W., Neue Mineralienfunde aus der Vulkaneifel, Mineralien-Welt 12/1, 17-25, 2001
              • Wingertsberg
    		Blass, G.; Graf, H.W., Neue Mineralienfunde aus der Vulkaneifel , Mineralien-Welt 12/1, 17-25, 2001
        • Rieden volcano
          • Mayen
            • Ettringen
    		Blass, G., Graf, HW., Kolitsch, U., Neue Funde und Mineralien aus der Eifel, Mineralienwelt 1/2002
    Greenland
     
    • Kitaa (West Greenland) Province
      • Maniitsoq (Sukkertoppen)
    		Petersen, O. V. and Secher, K. (1993): The minerals of Greenland, The Mineralogical Record, Vol. 24(2), 1-65
    Italy
     
    • Latium
      • Rome Province
    		Voltaggio M., Di Lisa G.A. (1995) - 230Th dating of uranpyrochlore in pyroclastic ejecta from the last products of explosive final activity of the Alban Hills volcanic complex (abs.). Periodico di Mineralogia, Roma, pp. 291-292
        • Sacrofano Caldera
          • Campagnano di Roma
    		AA. VV., 1996. Collezionare minerali. Hobby & Work.
      • Viterbo Province
        • Vico Lake
    		No reference listed
    • Lombardy
      • Sondrio Province
        • Bregaglia Valley
    		AA. VV., 1996. Collezionare minerali. Hobby & Work.
    Madagascar
     
    • Antananarivo Province
      • Vakinankaratra Region
    		RRUFF specimen R060165
    [var: Samiresite] Lacroix, A. (1922): Mineralogie de Madagascar, Tome I. Géologie-Minéralogie descriptive. A.Challamel (Éditeur), Paris. p 374
          • Tritriva Commune
    		[var: Samiresite] Bull. Soc. franc.Mineral. 35 (1912), pp 84-92/ A.Lacroix: (1922) Mineralogie de Madagascar I ,p 283
    Lacroix, A. (1908): Les minéraux des filons de pegmatite á tourmaline lithique de Madagascar. Bulletin de la Société Francaise de Minéralogie 31: 218- 247
          • Sahatany Valley
    		Knut Edvard Larsen collection (XRD, metamict + SEM identified)
    • Fianarantsoa Province
      • Amoron'i Mania Region
        • Fandriana District
    		[var: Samiresite] Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
    Malawi
     
    • Chitipa District
      • Songwe Complex
    		Orris, G.J., and Grauch, R.I. (2002): USGS Open-File Report 02-189.
    Namibia
     
    • Erongo Region
      • Brandberg Area
    		Orris, G.J., and Grauch, R.I. (2002): USGS Open-File Report 02-189.
    Norway
     
    • Aust-Agder
    		Hawthorne, F.C., Groat, L.A., Raudsepp, M., Ball, N.A., Kimata, M., Spike, F.D., Gaba, R., Halden N.M. & Lumpkin, G.R. (1991): Alphadecay damage of titanite. American Mineralogist, 76, 370-396
    • Telemark
      • Nome
    		Bjørlykke & Svinndal (1960) in Vokes, F.M. (ed) (1960): Mines in South and Central Norway. International Geological Congress XXI session, Norway. Norges Geologiske Undersøkelse, 212m, 1-73 (p.23); Neumann, H. (1985): Norges Mineraler. Norges Geologiske Undersøkelse Skrifter 68, (p.67)
    Poland
     
    • Lower Silesia (Dolnośląskie)
      • Dzierżoniów District
        • Piława Górna
    		PIECZKA et al. 2010: Nb-Ta minerals in pegmatites in the DSS mine at Piława Górna, Góry Sowie Block, southwestern Poland. Mineralogia - Special Papers, 37.
      • Sowie Mts
    		Łodziński M. & Pieczka A. 2008: (Nb-Ta)-oxide minerals from pegmatites of the Owiesno-Kietlice area in the Sowie Mts block, Southwestern Poland. Mineralogia - Special Papers, vol. 32, p. 107
    Romania
     
    • Harghita Co.
      • Ditrău (Ditró)
    		Szakáll, S. & Kristály, F., Eds. (2010): Mineralogy of Székelyland, Eastern Transylvania, Romania. Csík County Nature and Conservation Society, Miercurea-Ciuc, Romania, 321 pp.
    Russia
     
    • Eastern-Siberian Region
      • Prebaikalia (Pribaikal'e)
        • Irkutskaya Oblast'
          • Lake Baikal area
    		Pavel M. Kartashov data
      • Tuva Republic
        • Sayan Mts
          • Eastern Sayan
    		P.M. Kartashov data
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
    www.koeln.netsurf.de/~w.steffens/lovo.htm
    • Urals Region
      • Southern Urals
        • Chelyabinsk Oblast'
          • Vishnevye (Vishnyovye; Cherry) Mts
    		Nedosekova, I.L. (2007): Geology of Ore Deposits 49(2), 129-146.
    Slovakia
     
    • Banská Bystrica Region
      • Banská Bystrica Co.
        • Brusno
    		Uher, P. ,Černý, P., 1998 : Vzácnoprvková mineralizácia v granitových pegmatitoch Nízkych Tatier. Mineralia Slovaca, 30, 2,93 – 94
    South Africa
     
    • North West Province
      • Western Bushveld Complex
        • Rustenburg District
    		R. Liferovich - L. Horváth p.c. (2004)
    Sweden
     
    • Lappland
      • Jokkmokk
    Ukraine
     
    • Zaporozhskaya Oblast' (Zaporiz'ka; Zaporozh'e)
      • Priazovie
    		Ryabchikov, I.D., Kogarko, L.N., Krivdik, S.G., and Ntaflos, T. (2008): Geology of Ore Deposits 50(6), 423-432.
    • Zhytomyr Oblast' (Zhitomir Oblast')
    		P.M. Kartashov data
    USA
     
    • Alaska
      • Yukon-Koyukuk Borough
        • Hot Springs District
    		U.S. Geological Survey, 2008, Alaska Resource Data File (ARDF): U.S. Geological Survey Open-File Report 2008-1225.
    • Colorado
      • Chaffee Co.
        • Turret District
    		Ralph Parkes
      • Fremont Co.
        • Eight Mile Park pegmatite District
    		Minerals of Colorado (1997) E.B. Eckels
      • Gunnison Co.
        • Quartz Creek Pegmatite District
          • Brown Derby Mine
    		Minerals of Colorado (1997) E.B. Eckels
    Minerals of Colorado (1997) Eckels, E. B.
      • Jefferson Co.
        • South Platte Pegmatite District
      • Park Co.
    		Rudy Boloña identification and collection, collected by Jim Hall
    • Connecticut
      • Middlesex Co.
        • Portland
    		Specimen in collection of Andrew Kruegel
    • New Hampshire
      • Carroll Co.
        • Albany
    		Rocks and Minerals, (1990) 65:286-296
    • New Mexico
      • Mora Co.
    		Northrop, Minerals of New Mexico, 3rd Rev. Ed., 1996
    Am Min 1953 p1090
      • San Miguel Co.
        • Elk Mountain District
    		Minerals of New Mexico 3rd ed.; Jahns, R. H., (1946) Mica Deposits of the Petaca District, Rio Arriba County, New Mexico, with Brief Descriptions of the Ojo Caliente District, Rio Arriba County, and the Elk Mountain District, San Miguel County. NMBMGR Bulletin 25.
      • Taos Co.
        • Picuris District
    		Minerals of New Mexico 3rd ed.
    • North Carolina
      • McDowell Co.
    		Joseph A.Mandarino and Malcolm E. Back, 2004, Fleischers Glossary of Mineral Species 2004, pg # 284
    8th Dana,pg. 345 and 7th Dana,1944,pg.751,752 and 754
        • Spruce Pine District
          • Spruce Pine
            • Greasy Creek Township
    		Genth,1891,pg.72 and pg.107
      • Yancey Co.
        • Spruce Pine District
          • Burnsville
            • Hurricane Mountain
    		Genth,1875, Minerals of North Carolina,Appendix C to Kerr,W.C,Report Geological Survey of North Carolina,Raleigh,Vol.1.pg.79
    • Virginia
      • Amelia Co.
        • Amelia (Amelia Court House)
    		Minerals of Virginia 1990 by R. V. Dietrich
    • Wisconsin
      • Marathon Co.
        • Rib Mountain
    		Cordura, W http://www.uwex.edu/wgnhs/Mineral%20Index/Minerals/pyrochlore.htm
        • Wausau pluton
          • "Rotten granite" quarries
    		www.uwrf.edu/~wc01/pyrochlore.htm
    Vietnam
     
    • Lai Chau Province
      • Phong Tho District
        • Mt Fansipan
    		Feldman l.G., Sarkisyan S.Sh., Boriskin V.P., Purusova S.P., Nguen Van Hoai, Chin Suan Ben (1987) Crystalline beckelite from Nam Se deposit (Northern Vietnam), - Mineralogicheskiy Zhurnal, v.9, N1, pp. 78-86 (in Rus.)
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