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Petscheckite

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Petscheckit
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Petscheckit
Bildbreite: 8 mm, Fundort: Tiltvika-Pegmatit, Hamarøy, Nordland, Norwegen
Copyright: Luigi Chiappino; Contribution: thdun5
Location: Norwegen/Nordland, Provinz/Hamarøy, Kommune/Tiltvika-Pegmatit
Mineral: Petscheckite
Image: 1271685492
Rating: 4.5 (votes: 2)
License: Usage for Mineralienatlas project only
Petscheckit

Bildbreite: 8 mm, Fundort: Tiltvika-Pegmatit, Hamarøy, Nordland, Norwegen

Copyright: Luigi Chiappino
Contribution: thdun5 2010-04-19
Locality: Tiltvika-Pegmatit / Hamarøy, Kommune / Nordland, Provinz / Norwegen

Collectors Summary

Color schwarz
Streak color braunschwarz
Lustre Matallglanz
Hardness (Mohs) 5
Crystal System trigonal, P31m

Chemism

Chemical formula

U4+Fe2+Nb2O8

Chemical composition

Eisen, Niob, Sauerstoff, Uran

Unit weight: 607.682317 u; Number of atoms in the formula: 12

Info

Empirical formula:

UFeNb2O8

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

21.06

8

66.67

15.9994300

127.9954400

Iron

Fe

9.19

1

8.33

55.8452000

55.8452000

Niobium

Nb

30.58

2

16.67

92.9063820

185.8127640

Uranium

U

39.17

1

8.33

238.0289130

238.0289130

Strunz 9th edition incl. updates

4.DH.35

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
D: Metall: Sauerstoff = 1:2 und vergleichbare
H: Mit großen (± mittelgroßen) [Kationen]; Lagen kantenverknüpfter Oktaeder
35:Petscheckit-Gruppe

Lapis Classification

IV/D.23-010

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

Classification by Hölzel

4.DJ.560

4: OXIDES
D: Dioxides
J: Titanates, Niobates and Tantalates, C large, V medium ò 2
5: Other Niobates, Tantalates

Dana 8th edition

08.01.09.02

08: Multiple Oxides with Nb, Ta, and Ti
01: Multiple Oxides with Nb, Ta, and Ti where A BO4

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

schwarz

Streak color

braunschwarz

Change in color

weiß mit orangen Farbton in reflektiertem Licht, mit rotbraunen internen Reflektionen

Diaphaneity (Transparency)

opak

Lustre

Matallglanz

Anisotropism

isotropisch

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

162

Space Group

P31m

Cell parameters a (Å)

6.42

Cell parameters b (Å)

-

Cell parameters c (Å)

4.02

Cell parameters a/b or c/a

0.626

Cell parameters c/b

-

Z

1

Volume (ų)

143.492

X-Ray Powder Diffraction

4.02(100),
3.21(100),
2.51(80),
2.01(20),
1.861(20),
1.850(30),
1.697(40),
1.492(20)

XRD chart Petscheckite

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

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

5

VHN (Hardness Vickers)

390 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

7.0 (gemessen)

7.032 ( ρ calc. Mineralienatlas )

Radioactivity

das Mineral ist radioaktiv da Uran-haltig

Preface

Name from

Eckehard Petsch (geboren 1939) aus Idar-Oberstein, Deutschland; Er prospektierte ausgiebig in Madagaskar

Author (Name, Year)

Mücke & Strunz, 1978

Safety Instructions

Industrial chemicals are often present in powder form and therefore often contain much higher dangers than natural, crystalline substances. These hazard statements refer to the classification of industrially used chemical compounds that may also occur in this natural mineral. The hazard classification makes no claim to completeness.




Safety classes: Ionizing radiation: Radioaktiv

References

American Mineralogist 63 (1978), 941

Tomašić, N., Raade, G. & Bermanec, V. - REE-bearing petscheckite from Tiltvika, Nordland, Norway, and its heating products. Neues Jahrbuch für Mineralogie Monatshefte 2004 (4), 163-175

Other languages

German

Petscheckit

Spanish

Petscheckita

French

Petscheckite

English

Petscheckite

Japanese

ベチェック石

CNMNC (IMA)-Number

IMA 1975-038

CNMNC symbol

Symbol

Psk

Locations with GPS information

IDs

GUSID (Global unique identifier short form) -mp_mGTmOESJeel7bxH9dA
GUID (Global unique identifier) 987F6AFA-E664-4438-8979-E97B6F11FD74
Database ID 3017