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Písekite-(Y)

Colour:Yellowish brown to blackHardness:5½ - 6
Name:After the locality of Pisek, Bohemia, Czech Republic.


A synonym for Monazite-(Y) from Písek, Czech Republic. Possibly considered a valid species by some with formula (Y,As,Ca,Fe,U)(Nb,Ti,Ta)O4.

Classification of Písekite-(Y)

Nickel-Strunz 10th (pending) edition ID:4.DB.25

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
B : With medium-sized cations; chains of edge-sharing octahedra
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Physical Properties of Písekite-(Y)

Lustre:Vitreous, Resinous
Colour:Yellowish brown to black
Streak:Gray
Hardness (Mohs):5½ - 6
Fracture:Conchoidal
Density (measured):4.032 g/cm3

Crystallography of Písekite-(Y)

Morphology:Crystals elongated [010] and flattened {100}.

Relationship of Písekite-(Y) to other Species

Related Minerals - Nickel-Strunz Grouping):
4.DB.05Argutite
GeO
 
2
4.DB.05Cassiterite
SnO
 
2
4.DB.05Plattnerite
PbO
 
2
4.DB.05Pyrolusite
MnO
 
2
4.DB.05Rutile
TiO
 
2
4.DB.05Tripuhyite
Fe
3+
 
Sb
5+
 
O
 
4
4.DB.05Tugarinovite
MoO
 
2
4.DB.05Varlamoffite
(Sn,Fe)(O,OH)
 
2
4.DB.10Byströmite
MgSb
 
2
O
 
6
4.DB.10Tapiolite-(Fe)
(Fe,Mn)(Ta,Nb)
 
2
O
 
6
4.DB.10Tapiolite-(Mn)
(Mn,Fe)(Ta,Nb)
 
2
O
 
6
4.DB.10Ordoñezite
ZnSb
 
2
O
 
6
4.DB.15Akhtenskite
ε-Mn
4+
 
O
 
2
4.DB.15Nsutite
(Mn
4+
 
,Mn
2+
 
)(O,OH)
 
2
4.DB.15Paramontroseite
VO
 
2
4.DB.15Ramsdellite
Mn
4+
 
O
 
2
4.DB.20Scrutinyite
alpha-PbO
 
2
4.DB.25Ishikawaite
U
4+
 
Fe
2+
 
Nb
 
2
O
 
8
4.DB.25Ixiolite
(Ta,Nb,Sn,Fe,Mn)
 
4
O
 
8
4.DB.25Samarskite-(Y)
(Y,Fe
3+
 
,Fe
2+
 
,U,Th,Ca)
 
2
(Nb,Ta)
 
2
O
 
8
4.DB.25Srilankite
Ti
 
2
ZrO
 
6
4.DB.25Yttrocolumbite-(Y)
Y(U
4+
 
,Fe
2+
 
)Nb
 
2
O
 
8
4.DB.25Calciosamarskite
(Ca,Fe
3+
 
,Y)
 
2
(Nb,Ta,Ti)
 
2
O
 
8
4.DB.25Iwashiroite-(Y)
Y(Ta,Nb)O
 
4
4.DB.25Samarskite-(Yb)
(Yb,Fe
3+
 
)
 
2
(Nb,Ta)
 
2
O
 
8
4.DB.30Ferberite
FeWO
 
4
4.DB.30Hübnerite
MnWO
 
4
4.DB.30Sanmartinite
(Zn,Fe)WO
 
4
4.DB.30Krasnoselskite
CoWO
 
4
4.DB.35Columbite-(Fe)
FeNb
 
2
O
 
6
4.DB.35Tantalite-(Fe)
FeTa
 
2
O
 
6
4.DB.35Columbite-(Mn)
(Mn,Fe)(Nb,Ta)
 
2
O
 
6
4.DB.35Tantalite-(Mn)
MnTa
 
2
O
 
6
4.DB.35Columbite-(Mg)
(Mg,Fe,Mn)(Nb,Ta)
 
2
O
 
6
4.DB.35Qitianlingite
(Fe,Mn)
 
2
(Nb,Ta)
 
2
WO
 
10
4.DB.35Magnocolumbite
4.DB.35Tantalite-(Mg)
(Mg,Fe
2+
 
)(Ta,Nb)
 
2
O
 
6
4.DB.40Ferrowodginite
FeSnTa
 
2
O
 
8
4.DB.40Lithiotantite
Li(Ta,Nb)
 
3
O
 
8
4.DB.40Lithiowodginite
LiTa
 
3
O
 
8
4.DB.40Titanowodginite
MnTiTa
 
2
O
 
8
4.DB.40Wodginite
Mn(Sn,Ta)Ta
 
2
O
 
8
4.DB.40Ferrotitanowodginite
Fe
2+
 
TiTa
 
2
O
 
8
4.DB.45Tivanite
VTiO
 
3
(OH)
4.DB.50Carmichaelite
(Ti,Cr,Fe)[O
 
2-x
(OH)
 
x
]
4.DB.55Alumotantite
AlTaO
 
4
4.DB.60Biehlite
((Sb,As)O)
 
2
[MoO
 
4
]

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 Písekite-(Y)

Reference List:Krejči (1923), Časopis Min. Geol. Prague: 1: 2.

Nováček (1936), Vĕda Příodin Jahrg.: 17: 1. - Min. Abs. (1937): 6: 507.

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: 807.

Lithos (1972): 5: 93-103.

Strunz-Nickel (2001): 209.

Internet Links for Písekite-(Y)

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