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

Ungursaite

Additional Functions

Collectors Summary

Color farblos
Lustre Diamantglanz
Hardness (Mohs) 6.75
Crystal System hexagonal, P63, P63/m

Chemism

Chemical formula

Ca(Ta,Nb)4O11

Chemical composition

Calcium, Niob, Tantal, Sauerstoff

Unit weight: 851.822242 u; Number of atoms in the formula: 16

Info

Empirical formula:

Ca(Ta0.75Nb0.25)4O11

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

20.66

11

68.75

15.9994300

175.9937300

Calcium

Ca

4.71

1

6.25

40.0784000

40.0784000

Niobium

Nb

10.91

1

6.25

92.9063820

92.9063820

Tantalum

Ta

63.73

3

18.75

180.9479100

542.8437300

Analysis wt%

Ø Na2O : 0.54, CaO : 5.37, PbO : 0.41, SnO2 : 0.94, Nb2O5 : 4.83, Ta2O5 : 88.52 (Ref: American Mineralogist 86)

Strunz 9th edition incl. updates

4.DJ.05

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
D: Metall: Sauerstoff = 1:2 und vergleichbare
J: Mit großen (± mittelgroßen) [Kationen]; vielgestaltige (polyhedrale) Gerüste
05:Natrotantit-Gruppe

Classification by Hölzel

4.DJ.530

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

IMA status

diskreditiert 1988

Optical Properties

Color

farblos

Lustre

Diamantglanz

2V angle

Uniaxial

Crystallography

Crystal System

hexagonal

Class (H-M)

6, 6/m

Space Group number

173, 176

Space Group

P63, P63/m

Cell parameters a (Å)

6.218

Cell parameters b (Å)

-

Cell parameters c (Å)

36.80

Cell parameters a/b or c/a

5.918

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

6

Volume (ų)

1232.196

Physical Properties

Hardness (Mohs)

6.75

Density (g/cm³)

7.23 (berechnet)

6.887 ( ρ calc. Mineralienatlas )

Preface

Author (Name, Year)

Voloshin & Pakhomovskiy & Bulgak & Perlina, 1985

References

Mineral. Zhurnal, Kiev (1985): 7(4): 88.

American Mineralogist (1986): 71: 1546 (abs).

Soviet Physics, Crystallography 33 (1988), 498

Strunz Mineralogical Tables 9. Edition (2001), 225.

Other languages

German

Ungursait

English

Ungursaite

Russian

Унгурсаит

Alternative Name

Spanish

Ungursaita

IDs

GUSID (Global unique identifier short form) CZhGt0h7jEmazLtQ1Kkcwg
GUID (Global unique identifier) B7469809-7B48-498C-9ACC-BB50D4A91CC2
Database ID 4548