https://www.mineralbox.biz
https://www.mineral-bosse.de
https://www.edelsteine-neuburg.de
https://www.mineraliengrosshandel.com
'._('einklappen').'
 

Liandratite (Liandratit)

Pictures (1 Images total)

Liandradit
Views (File:
1588268219
): 319
Liandradit
gelbe Krusten von Liandradit, Antsakoa I Pegmatit, Berere, Mahajanga Provinz, Madagaskar; BB ~ 1 mm
Copyright: Joy Desor; Contribution: openpit
Location: Madagaskar/Betsiboka, Region/Tsaratanàna, Distrikt/Berere-Pegmatit/Antsakoa-Pegmatit
Mineral: Liandratite
Image: 1588268219
License: Usage for Mineralienatlas project only
Liandradit

gelbe Krusten von Liandradit, Antsakoa I Pegmatit, Berere, Mahajanga Provinz, Madagaskar; BB 1 mm
Copyright: Joy Desor
Contribution: openpit 2020-04-30
Locality: Antsakoa-Pegmatit / Berere-Pegmatit / Tsaratanàna, Distrikt / Betsiboka, Region / Madagaskar

Collectors Summary

Hardness (Mohs) 3.5
Crystal System trigonal, P31m

Chemism

Chemical formula

U6+(Nb,Ta)2O8

Chemical composition

Niob, Tantal, Sauerstoff, Uran

Unit weight: 595.857881 u; Number of atoms in the formula: 11

Info

Empirical formula:

U(Nb0.75Ta0.25)2O8

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

21.48

8

72.73

15.9994300

127.9954400
Niobium

Nb

23.39

1.5

13.64

92.9063820

139.3595730
Tantalum

Ta

15.18

0.5

4.55

180.9479100

90.4739550
Uranium

U

39.95

1

9.09

238.0289130

238.0289130

Analysis wt%

UO3 : 48.73, Nb2O5 : 36.22, Ta2O5 : 15.05 (Ref: American Mineralogist 78)

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.23-020

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

Classification by Hölzel

4.DJ.570

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

Dana 8th edition

08.01.09.01

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

RI value α / ω / n

1.83

RI value β

metam.

RI value γ / ε

1.83

Ri mean

1.83

2V angle

u(i) nd

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

162

Space Group

P31m

Cell parameters a (Å)

6.36

Cell parameters b (Å)

-

Cell parameters c (Å)

4.01

Cell parameters a/b or c/a

0.631

Cell parameters c/b

-

Z

1

Volumne (ų)

140.472

X-Ray Powder Diffraction

4.01(80),
3.18(100),
2.49(40),
2.00(20),
1.838(30),
1.692(20),
1.667(10),
1.200(20)
XRD chart Liandratite

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

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

3.5

VHN (Hardness Vickers)

130 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

6.8 (gemessen)

7.043 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Madagaskar/Betsiboka, Region/Tsaratanàna, Distrikt/Berere-Pegmatit/Antsakoa-Pegmatit

Preface

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

Other languages

German

Liandratit

Spanish

Liandratita

French

Liandratite

English

Liandratite

Alternative Name

German

Liandradit

Spanish

Liandradita

Liandradite

CNMNC (IMA)-Number

IMA 1975-039

CNMNC symbol

Symbol

Lia

Locations with GPS information