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Iwashiroite-(Y)

Additional Functions

Collectors Summary

Color dunkel rotbraun, amber
Lustre Glasglanz bis Diamantglanz
Hardness (Mohs) 6
Cleavages gut (010) und undeutlich (001)
Fracture halbmuschelig
Crystal System monoklin, P2/a

Chemism

Chem­ical formula

YTaO4

Addi­tional chem. informa­tion

Dimorph mit Formanit-(Y)

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

Anal­y­sis wt%

Ta2O5 : 40.64, Nb2O5 : 16.66, TiO2 : 0.41, Y2O3 : 29.10, Gd2O3 : 1.06, Dy2O3 : 2.38, Ho2O3 : 0.56, Er2O3 : 2.09, Yb2O3 : 3.33, Lu2O3 : 0.95, Ln2O3 : 40.55 (Ref: J.Min.Petrol.Sci.2006)

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.24-005

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

Clas­sifica­tion by Hölzel

4.DJ.465

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

IMA sta­tus

anerkannt 2003

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

dunkel rotbraun, amber

Diaphane­ity (Trans­parency)

durchscheinend

Lus­tre

Glasglanz bis Diamantglanz

Reflec­tiv­ity: (Lambda nm) ↓, ↑, Ø

(470) 13.8, 14.1, 14.0
(546) 13.6, 13.8, 13.7
(589) 13.6, 13.9, 13.8
(650) 13.7, 14.0, 13.9
Reflection chart Iwashiroite-(Y)

Reflec­tiv­ity Ø

13.81

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

13

Space Group

P2/a

Cell param­e­ters a (Å)

5.262

Cell param­e­ters b (Å)

5.451

Cell param­e­ters c (Å)

5.110

Cell param­e­ters a/b or c/a

0.965

Cell param­e­ters c/b

0.937

Cell param­e­ters α

90°

Cell param­e­ters β

95.12

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

145.986

X-Ray Pow­der Diffrac­tion

3.13(100), 2.95(94), 2.73(26), 2.62(23), 1.890(29), 1.862(29), 1.614(20)
XRD chart Iwashiroite-(Y)

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

Crystals 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

6

VHN (Hard­ness Vick­ers)

796 (50g)

Density (g/cm³)

7.1 ber.

7.594 ( ρ calc. Mineralienatlas )

Cleav­ages

gut (010) und undeutlich (001)

Frac­ture

halbmuschelig

Tenac­ity

spröde

(Co-)Type locality

(Co-)Type locality

Japan/Honshu/Tohoku, Region/Fukushima, Präfektur/Kawamata/Iisaka/Suishoyama Pegmatit

Par­a­ge­n­e­sis of type mate­r­ial

Quarz, Mikroklin, Annit

Preface

Author (Name, Year)

Hori & Kobayashi & Miyawaki & Matsubara & Yokoyama & Shimizu, 2006

Addi­tional Informa­tion

Bisher nur eine Art gefunden, in rötlichem Feldspat im Pegmatit

References

Journal of Mineralogical and Petrological Sciences (formerly Mineralogical Journal) 101 (2006), 170
Mineralien Welt 03/09, Steffen Jahn, Neue Mineralien

Other languages

German

Iwashiroit-(Y)

English

Iwashiroite-(Y)

Russian

Ивасироит-(Y)

Traditional Chinese

斜方鉭釔礦

Simplified Chinese

斜方钽钇矿

Alternative Name

Japanese

岩代石

CNMNC (IMA)-Number

IMA 2003-053

CNMNC symbol

Symbol

Iwa-Y

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

German pages

 DeWikiPedia - search for: Iwashiroit-(Y)
Google-Bilder-Suche - search for: Iwashiroit-(Y)
Mineralienatlas.de (Forum) - search for: Iwashiroit-(Y)

English pages

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

Russian pages

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

Mineral Dealer

German pages

 hausen - Mineralgroßhandel - search for: Iwashiroit-(Y)
Crystal-Treasure.com - search for: Iwashiroit-(Y)
Bosse - search for: Iwashiroit-(Y)
Edelsteine Neuburg - Gundolf Fischer - search for: Iwashiroit-(Y)