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Formanite-(Y)

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Formanit-(Y) (xx) in Quarz und Plagioklas
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Formanit-(Y) (xx) in Quarz und Plagioklas

Bildbreite: 12 mm; Fundort: Ytterby, Resarö, Uppland, Schweden

Copyright: Pavel M. Kartashov
Contribution: slugslayer 2009-05-24
Locality: Ytterby / Resarö / Stockholm, Provinz / Schweden

Collectors Summary

Color bräunlichschwarz
Streak color braun
Hardness (Mohs) 5.50 - 6.00
Solubility +++ HF
Crystal System monoklin, P2/a

Chemism

Chem­ical formula

YTaO4

Chem­ical com­po­si­tion

Tantal, Yttrium, Sauerstoff

Unit weight: 333.851482 u; Number of atoms in the formula: 6

Info

Empirical formula:

YTaO4

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

19.17

4

66.67

15.9994300

63.9977200

Yttrium

Y

26.63

1

16.67

88.9058520

88.9058520

Tantalum

Ta

54.20

1

16.67

180.9479100

180.9479100

Strunz 9th edi­tion incl. updates

7.GA.05

7: Sulfate (Selenate, Tellurate, Chromate, Molybdate, Wolframate)
G: Molybdate und Wolframate
A: Ohne zusätzliche [Anionen] oder H2O
05:Scheelit-Gruppe

Lapis Clas­sifica­tion

IV/D.24-070

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

Clas­sifica­tion by Hölzel

4.DJ.460

4: OXIDES
D: Dioxides
J: Titanates, Niobates and Tantalates, C large, V medium ò 2
4: Fergusonite-Group

Dana 8th edi­tion

08.01.01.02

08: Multiple Oxides with Nb, Ta, and Ti
01: Multiple Oxides with Nb, Ta, and Ti where A BO4
01: Fergusonite Group (Tetragonal)

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

bräunlichschwarz

Streak color

braun

RI value α / ω / n

2.14

RI value β

metam.

Ri mean

2.14

2V angle

i metam.

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

13

Space Group

P2/a

Cell param­e­ters a (Å)

7.76

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

11.32

Cell param­e­ters a/b or c/a

1.459

Cell param­e­ters c/b

-

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

681.7

X-Ray Pow­der Diffrac­tion

3.13(100),
2.933(90),
2.723(60),
1.900(70),
1.641(70),
1.567(70),
1.216(60),
1.188(60)

XRD chart Formanite-(Y)

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

Crystals 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

5.50 - 6.00

VHN (Hard­ness Vick­ers)

730 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

1.626 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ HF

(Co-)Type locality

(Co-)Type locality

Australien/Western Australia/Pilbara/Cooglegong

Preface

Author (Name, Year)

Berman & Frondel, 1944

References

Handbook of Mineralogy (Anthony et al.), 3 (1997), 207

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

Stolzite

PbWO4

tetragonal : 4/m : I41/a

7.GA.05

Powellite

CaMoO4

tetragonal : 4/m : I41/a

7.GA.05

Scheelite

CaWO4

tetragonal : 4/m : I41/a

7.GA.05

Wulfenite

PbMoO4

tetragonal : 4/m : I41/a

7.GA.05

'W-bearing Wulfenite'

Pb(Mo,W)O4

tetragonal : 4 : I4

7.GA.05

Formanite-(Y)

YTaO4

monoklin : 2/m : P2/a

7.GA.05

Suseinargiuite

NaBi(MoO4)2

tetragonal : 4/m : I41/a

7.GA.05

Fergusonite-(Y)

YNbO4

tetragonal : 4/m : I41/a

7.GA.05

'Fergusonite-(Ce)'

CeNbO4

tetragonal : 4/m : I41/a

7.GA.05

'Fergusonite-(Nd)'

(Nd,Ce)(Nb,Ti)O4

7.GA.05

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

Takanawaite-(Y)

Y[Ta,Nb]O4

monoklin : 2/m : I2/a

IV/D.24-003

Iwashiroite-(Y)

YTaO4

monoklin : 2/m : P2/a

IV/D.24-005

Fergusonite-(Y)-β

YNbO4

monoklin : I2/a

IV/D.24-010

Fergusonite-(Ce)-β

(Ce,La,Nd)NbO4

monoklin : 2/m : I2/a

IV/D.24-020

Fergusonite-beta-(Nd)

(Nd,Ce)NbO4

IV/D.24-030

Fergusonite-(Y)

YNbO4

tetragonal : 4/m : I41/a

IV/D.24-040

'Fergusonite-(Ce)'

CeNbO4

tetragonal : 4/m : I41/a

IV/D.24-050

'Fergusonite-(Nd)'

(Nd,Ce)(Nb,Ti)O4

IV/D.24-060

Formanite-(Y)

YTaO4

monoklin : 2/m : P2/a

IV/D.24-070

Raspite

PbWO4

monoklin : 2/m : P21/a

IV/D.24-080

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

Yttrotantalite-(Y)

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

4.DJ.400

Fergusonite-(Y)-β

YNbO4

monoklin : I2/a

4.DJ.410

Fergusonite-beta-(Nd)

(Nd,Ce)NbO4

4.DJ.420

Fergusonite-(Ce)-β

(Ce,La,Nd)NbO4

monoklin : 2/m : I2/a

4.DJ.430

Takanawaite-(Y)

Y[Ta,Nb]O4

monoklin : 2/m : I2/a

4.DJ.440

Fergusonite-(Y)

YNbO4

tetragonal : 4/m : I41/a

4.DJ.450

Formanite-(Y)

YTaO4

monoklin : 2/m : P2/a

4.DJ.460

Iwashiroite-(Y)

YTaO4

monoklin : 2/m : P2/a

4.DJ.465

'Fergusonite-(Ce)'

CeNbO4

tetragonal : 4/m : I41/a

4.DJ.470

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Fergusonite-(Y)

YNbO4

tetragonal : 4/m : I41/a

08.01.01.01

Formanite-(Y)

YTaO4

monoklin : 2/m : P2/a

08.01.01.02

'Fergusonite-(Ce)'

CeNbO4

tetragonal : 4/m : I41/a

08.01.01.03

Yttrotantalite-(Y)

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

08.01.03.01

'Yttrocolumbite-(Y)'

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

08.01.03.02

Ishikawaite

(U,Fe,Y)NbO4

08.01.04.01

Loranskite-(Y)

(Y,Ce,Ca)ZrTaO6

08.01.05.01

Stibiocolumbite

SbNbO4

orthorhombisch : mm2 : Pc21n

08.01.06.01

Stibiotantalite

Sb3+TaO4

orthorhombisch : mm2 : Pc21n

08.01.06.02

Bismutotantalite

Bi(Ta,Nb)O4

orthorhombisch : mmm : Pcnn

08.01.06.03

Bismutocolumbite

Bi(Nb,Ta)O4

orthorhombisch : mmm : Pcnn

08.01.06.04

Alumotantite

AlTaO4

orthorhombisch : mmm : Pbcn

08.01.07.01

Wodginite

Mn2+Sn4+Ta2O8

monoklin : 2/m : C2/c

08.01.08.01

Ferrowodginite

(Fe2+,Mn2+)(Sn,Ti,Fe3+,Ta)(Ta,Nb)2O8

monoklin : 2/m : C2/c

08.01.08.02

Titanowodginite

(Mn2+,Fe2+)(Ti,Sn,Ta,Sc)(Ta,Nb)2O8

monoklin : 2/m : C2/c

08.01.08.03

Lithiowodginite

(Li,Mn,Fe)(Ta,Nb,Sn)3O8

monoklin : 2/m : C2/c

08.01.08.04

Ferrotitanowodginite

(Fe2+,Mn2+)(Ti,Sn4+,Ta,Fe3+)(Ta,Nb)2O8

monoklin : 2/m : C2/c

08.01.08.05

Liandratite

U6+(Nb,Ta)2O8

trigonal : 3m : P31m

08.01.09.01

Petscheckite

U4+Fe2+Nb2O8

trigonal : 3m : P31m

08.01.09.02

Other languages

German

Formanit-(Y)

Spanish

Formanita-(Y)

English

Formanite-(Y)

French

Formanite-(Y)

Russian

Форманит-(Y)

Simplified Chinese

黄钇钽矿

Japanese

イットロフォーマン鉱

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

German pages

DeWikiPedia - search for: Formanit-(Y)
Google-Bilder-Suche - search for: Formanit-(Y)
Mineralogisch-Petrographisches-Institut Hamburg - search for: Formanit-(Y)

English pages

Mindat - search for: Formanite-(Y)
Webmineral - search for:Formanite-(Y)
Handbook-of-Mineralogy - search for: Formanite-(Y)
RRUFF - Raman, XRD and other mineral data - search for: Formanite-(Y)
RRUFF - References and PDF downloads - search for: Formanite-(Y)
American-Mineralogist-Crystal-Structure-Database - search for: Formanite-(Y)
Athena - search for: Formanite-(Y)

Russian pages

Webmineral.ru - search for: Форманит-(Y)

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Formanit-(Y)
Crystal-Treasure.com - search for: Formanit-(Y)
Bosse - search for: Formanit-(Y)

Locations with GPS information