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Formanite-(Y)

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Ytterby, Resarö, Vaxholm, Uppland, Sweden
© Pavel M. Kartashov

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Formula:
YTaO
 
4
Hardness:5½ - 6½
Name:After Francis Gloster Forman (1904-1980), government geologist (1934-1945) of Western Australia.

Forman was born in Western Australia on 28 December 1904 and educated at the University of Western Australia. He was Government Geologist of Western Australia (1934-45), employed by mining firms (1945-50) and was consulting geologist in private practice (1950-70). He was a member of the Royal Society of Western Australia and its president in 1937. One of his interests is the native flora and he collected for C. F. Gardner, then Government Botanist, whilst he was on geological field trips.

Ref: http://www.anbg.gov.au/biography/forman-francis-gloster.html
Hall, N. (1978) Botanists of the eucalypts. Commonwealth Scientific and Industrial Research Organisation, Melbourne




See also iwashiroite-(Y) and yttrotantalite-(Y).

According to single-crystal studies of both untreated and heated formanite-(Y) by Shi & Peng (1981), the mineral equals the M' polymorph of synthetic YTaO4 (Wolten, 1967).

Classification of Formanite-(Y)

IMA status:Approved
Strunz 8th edition ID:4/D.24-70
Nickel-Strunz 10th (pending) edition ID:7.GA.10

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
G : Molybdates, Wolframates and Niobates
A : Without additional anions or H2O
Dana 8th edition ID:8.1.1.2

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
1 : ABO4
Hey's CIM Ref.:18.2.7

18 : Niobates and Tantalates
2 : Niobates and tantalates containing rare earths but not U
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Type Occurrence of Formanite-(Y)

Type Locality:Cooglegong pegmatite, Pilbara Region, Western Australia, Australia

Physical Properties of Formanite-(Y)

Hardness (Mohs):5½ - 6½

Chemical Properties of Formanite-(Y)

Formula:
YTaO
 
4
Essential elements:O, Ta, Y
All elements listed in formula:O, Ta, Y

Relationship of Formanite-(Y) to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
7.GA.05Fergusonite-(Ce)
(Ce,La,Nd)NbO
 
4
7.GA.05Fergusonite-(Nd)
(Nd,Ce)(Nb,Ti)O
 
4
7.GA.05Fergusonite-(Y)
YNbO
 
4
7.GA.05Powellite
Ca(MoO
 
4
)
7.GA.05Scheelite
Ca(WO
 
4
)
7.GA.05Stolzite
Pb(WO
 
4
)
7.GA.05Wulfenite
Pb(MoO
 
4
)
7.GA.10Iwashiroite-(Y)
Y(Ta,Nb)O
 
4
7.GA.15Paraniite-(Y)
Ca
 
2
Y(AsO
 
4
)(WO
 
4
)
 
2
Related Minerals - Hey's Index Grouping:

- +
18.2.1Fergusonite-(Y)
YNbO
 
4
18.2.2β-Fergusonite-(Y)
YNbO
 
4
18.2.3Fergusonite-(Ce)
(Ce,La,Nd)NbO
 
4
18.2.4β-Fergusonite-(Ce)
(Ce,La,Nd)NbO
 
4
18.2.5Fergusonite-(Nd)
(Nd,Ce)(Nb,Ti)O
 
4
18.2.6β-Fergusonite-(Nd)
(Nd,Ce)NbO
 
4
18.2.8Pyrochlore Group
A
 
2
Nb
 
2
(O,OH)
 
6
Z
18.2.9Ceriopyrochlore (of Hogarth 1977)
18.2.10Strontiopyrochlore (of Hogarth 1977)
18.2.11Loparite-(Ce)
(Na,Ce,Ca,Sr,Th)(Ti,Nb,Fe)O
 
3
18.2.12Fersmite
(Ca,Ce,Na)(Nb,Ta,Ti)
 
2
(O,OH,F)
 
6
18.2.13Aeschynite-(Ce)
(Ce,Ca,Fe,Th)(Ti,Nb)
 
2
(O,OH)
 
6
18.2.14Aeschynite-(Nd)
(Nd,Ce,Ca)(Ti,Nb)
 
2
(O,OH)
 
6
18.2.15Aeschynite-(Y)
(Y,Ca,Fe,Th)(Ti,Nb)
 
2
(O,OH)
 
6
18.2.16Nioboaeschynite-(Ce)
(Ce,Ca,Th)(Nb,Ti)
 
2
(O,OH)
 
6
18.2.17Nioboaeschynite-(Nd)
(Nd,Ce,Ca,Th)(Nb,Ti,Fe,Ta)
 
2
(O,OH)
 
6
18.2.18Tantalaeschynite-(Y)
(Y,Ce,Ca)(Ta,Ti,Nb)
 
2
O
 
6
18.2.19Vigezzite
(Ca,Ce)(Nb,Ti)
 
2
O
 
6
18.2.20Murataite-(Y)
(Y,Na)
 
6
Zn(Zn,Fe
3+
 
)
 
4
(Ti,Nb,Na)
 
12
O
 
29
(O,F,OH)
 
10
F
 
4

Other Names for Formanite-(Y)

Other Languages:
German:Formanit-(Y)
Russian:Форманит-(Y)

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 Formanite-(Y)

Reference List:

- +
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: 757-762.

American Mineralogist (1944): 29: 456.

Wolten, G.M. (1967): The structure of the M'-phase of YTaO4, a third fergusonite polymorph. Acta Crystallogr., 23, 939-944.

Wolten, G. M. (1968): The structure of the M'-phase of YTaO4, a third fergusonite polymorph - Correction. Acta Cryst. B24, 463.

Shi, N. & Peng, Z. (1981): Mineralogical investigation on formanite. Chinese Science Bulletin (Kexue Tongbao) 26 (6), 548-551 (in English).

Shih, N. & Peng, Z. (1981) Mineralogy of formanite. K’o Hsueh T’ung Pao, 26(10), 616-617 (in Chinese).

Internet Links for Formanite-(Y)

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    • Localities for Formanite-(Y)

    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.
    Australia
     
    • Western Australia
      • Pilbara Region
    		Austral.Ass.Adv.Sci.(1909) 12, 310; Dana's System Mineral., 7th ed.(1944), vol.1, p.757-763
        • East Pilbara Shire
    Canada
     
    • Manitoba
      • Bird River Greenstone Belt
    China
     
    • Jiangxi Province
      • Ganzhou Prefecture
        • Gan Co.
    		Zhang Peishan, Yang Zhuming, Tao Kejie, and Yang Xueming (1996): "Mineralogy and Geology of Rare Earths in China", Science Press (Beijing), 226 pp.
    Zhang Peishan, Yang Zhuming, Tao Kejie, and Yang Xueming (1996): "Mineralogy and Geology of Rare Earths in China", Science Press (Beijing), 226 pp.
    Japan
     
    • Shikoku Island
      • Ehime Prefecture
    		Minakawa & Nishio (2002) Ganko-Gakkai Kou'en-Youshi, 287.
    Poland
     
    • Lower Silesia (Dolnośląskie)
      • Strzegom-Sobótka Massif
        • Jawor District
    		SZEŁĘG E., CIURLA A., 2004: Preliminary data on Nb-Ta oxides in pegmatites
    Sweden
     
    • Jämtland
      • Krokom
    		MinMag (1982) 46, 217-226
    • Uppland
      • Vaxholm
        • Resarö
    		Pavel M. Kartashov data
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