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Písekite-(Y)

Collectors Summary

Color gelblich braun bis schwarz
Streak color grau
Lustre Glasglanz bis Harzglanz
Hardness (Mohs) 5.5 - 6
Crystal System monoklin, P21/n
Morphology Kristalle gestreckt nach [010] und abgeflacht nach {100}.

Additional information / Summary

Metamikt; XRD Daten von erhitzter Probe; scheinbar Monazite-(Y)

Chemism

Chem­ical formula

(Y,As,Ca,Fe,U)(Nb,Ti,Ta)O4

Empir­ical formula (anal­y­sis)

(Y0.24Ce0.08As0.25Ca0.13Fe0.09U0.09Th0.02Al0.03Sn0.02Mg0.01Sc0.01)(Nb0.78Ta0.08Ti0.13W0.02)O3.75OH0.25

Chem­ical com­po­si­tion

Arsen, Calcium, Eisen, Niob, Tantal, Titan, Yttrium, Sauerstoff, Uran

Unit weight: 264.544620214 u; Number of atoms in the formula: 6.98

Info

Empirical formula:

(Y0.24Ce0.08As0.25Ca0.13Fe0.09U0.09Th0.02Al0.03Sn0.02Mg0.01Sc0.01)(Nb0.78Ta0.08Ti0.13W0.02)O3.75OH0.25

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.10

0.25

3.58

1.0079470

0.2519868

Oxygen

O

28.73

4.75

68.05

15.9994300

75.9972925

Magnesium

Mg

0.09

0.01

0.14

24.3050600

0.2430506

Aluminium

Al

0.31

0.03

0.43

26.9815382

0.8094461

Calcium

Ca

1.97

0.13

1.86

40.0784000

5.2101920

Scandium

Sc

0.17

0.01

0.14

44.9559108

0.4495591

Titanium

Ti

2.35

0.13

1.86

47.8671000

6.2227230

Iron

Fe

1.90

0.09

1.29

55.8452000

5.0260680

Arsenic

As

7.08

0.25

3.58

74.9216020

18.7304005

Yttrium

Y

8.07

0.24

3.44

88.9058520

21.3374045

Niobium

Nb

27.39

0.78

11.17

92.9063820

72.4669780

Tin

Sn

0.90

0.02

0.29

118.7107000

2.3742140

Cerium

Ce

4.24

0.08

1.15

140.1161000

11.2092880

Tantalum

Ta

5.47

0.08

1.15

180.9479100

14.4758328

Tungsten

W

1.39

0.02

0.29

183.8410000

3.6768200

Thorium

Th

1.75

0.02

0.29

232.0381100

4.6407622

Uranium

U

8.10

0.09

1.29

238.0289130

21.4226022

Strunz 9th edi­tion incl. updates

4.DB.25

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
D: Metall: Sauerstoff = 1:2 und vergleichbare
B: Mit mittelgroßen [Kationen]: Ketten kantenverknüpfter Oktaeder
25:Samarskit-Gruppe

Lapis Clas­sifica­tion

IV/D.19-065

IV: OXIDE
D: Oxide mit Verhältnis Metall : Sauerstoff = 1:2 (MO2 und verwandte Verbindungen)

IMA sta­tus

Erstbeschreibung vor CNMNC-Gründung (1959)

Min­eral sta­tus

Mineralstatus fragwürdig

Optical Properties

Color

gelblich braun bis schwarz

Streak color

grau

Lus­tre

Glasglanz bis Harzglanz

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/n

Cell param­e­ters a (Å)

6.57

Cell param­e­ters b (Å)

6.84

Cell param­e­ters c (Å)

6.217

Cell param­e­ters a/b or c/a

0.961

Cell param­e­ters c/b

0.909

Cell param­e­ters α

90°

Cell param­e­ters β

95.25°

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

278.212

X-Ray Pow­der Diffrac­tion

3.64(40),
3.095(60),
2.956(100),
2.581(50),
1.899(40),
1.822(70),
1.556(80),
1.184(50)

XRD chart Písekite-(Y)

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Morphol­ogy

Kristalle gestreckt nach [010] und abgeflacht nach {100}.

Physical Properties

Hard­ness (Mohs)

5.5 - 6

Density (g/cm³)

4.032

6.315 ( ρ calc. Mineralienatlas )

Preface

Name from

Der Lokalität Pisek, Böhmen, Tschechien

Author (Name, Year)

Krejci, 1923

References

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 5 (1972), 93-103.

Strunz Mineralogical Tables 9. Edition (2001), 209.

American Mineralogist 57 (1972), 1559

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Ixiolite

(Ta,Mn,Nb)O2

orthorhombisch : mmm : Pbcn

4.DB.25

Srilankite

(Ti,Zr)O2

orthorhombisch : mmm : Pbcn

4.DB.25

Ishikawaite

(U,Fe,Y)NbO4

4.DB.25

Rossovskyite

(Fe3+,Ta)(Nb,Ti)O4

monoklin : 2/m : P2/c

4.DB.25

Nioboheftetjernite

ScNbO4

monoklin : 2/m : P2/c

4.DB.25

'Písekite-(Y)'

(Y,As,Ca,Fe,U)(Nb,Ti,Ta)O4

monoklin : 2/m : P21/n

4.DB.25

Samarskite-(Y)

YFe3+Nb2O8

orthorhombisch : mmm : Pbcn

4.DB.25

Iwashiroite-(Y)

YTaO4

monoklin : 2/m : P2/a

4.DB.25

Samarskite-(Yb)

YbNbO4

monoklin : 2/m : P2/c

4.DB.25

Calciosamarskite

(Ca,Fe,Y)(Nb,Ta,Ti)O4

4.DB.25

'Yttrocolumbite-(Y)'

(Y,U,Fe2+)(Nb,Ta)O4

4.DB.25

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Polycrase-(Y)

(Y,Ca,Ce,U,Th)(Ti,Nb,Ta)2O6

orthorhombisch : mmm : Pbcn

IV/D.19-010

Uranopolycrase

(U,Y)(Ti,Nb,Ta)2(O,OH)6

orthorhombisch : mmm : Pbcn

IV/D.19-015

'Yttrocrasite-(Y)'

(Y,Th,Ca,U)(Ti,Fe3+)2(O,OH)6

IV/D.19-020

Fersmite

(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6

orthorhombisch : mmm : Pbcn

IV/D.19-030

Euxenite-(Y)

Y(Nb0.5Ti0.5)2O6

orthorhombisch : mmm : Pbcn

IV/D.19-040

Tanteuxenite-(Y)

(Y,Ce,Ca)(Ta,Nb,Ti)2(O,OH)6

orthorhombisch : mmm : Pbcn

IV/D.19-050

Calciosamarskite

(Ca,Fe,Y)(Nb,Ta,Ti)O4

IV/D.19-055

Samarskite-(Yb)

YbNbO4

monoklin : 2/m : P2/c

IV/D.19-058

Samarskite-(Y)

YFe3+Nb2O8

orthorhombisch : mmm : Pbcn

IV/D.19-060

'Písekite-(Y)'

(Y,As,Ca,Fe,U)(Nb,Ti,Ta)O4

monoklin : 2/m : P21/n

IV/D.19-065

Ishikawaite

(U,Fe,Y)NbO4

IV/D.19-070

'Yttrocolumbite-(Y)'

(Y,U,Fe2+)(Nb,Ta)O4

IV/D.19-080

Yttrotantalite-(Y)

(Y,U,Fe2+)(Ta,Nb)(O,OH)4

IV/D.19-090

Loranskite-(Y)

(Y,Ce,Ca)ZrTaO6

IV/D.19-100

Other languages

German

Písekit-(Y)

Spanish

Písekita-(Y)

French

Písekite-(Y)

English

Písekite-(Y)

CNMNC symbol

Symbol

Pís-Y

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Písekit-(Y)
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English pages

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German pages

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Locations with GPS information