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Parabariomicrolite (Parabariomicrolite)

Additional Functions

Collectors Summary

Color blassrosa, weiß
Hardness (Mohs) 4

Additional information / Summary

Parabariomikrolith = Polytyp Hydrokenomikrolith-3R

Chemism

Chemical formula

BaTa4O10(OH)2·2H2O

Chemical composition

Barium, Tantal, Sauerstoff, Wasserstoff

Unit weight: 1091.159042 u; Number of atoms in the formula: 25

Info

Empirical formula:

BaTa4O10(OH)2·2H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.55

6

24.00

1.0079470

6.0476820

Oxygen

O

20.53

14

56.00

15.9994300

223.9920200

Barium

Ba

12.59

1

4.00

137.3277000

137.3277000

Tantalum

Ta

66.33

4

16.00

180.9479100

723.7916400

Analysis wt%

Na2O : 0.40, SrO : 0.80, BaO : 10.50, PbO : 0.40, Nb2O5 : 1.50, Ta2O5 : 80.60, H2O : 5.20 (Ref: Canadian Mineralogist 86)

Strunz 9th edition incl. updates

4.FJ.20

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
F: Hydroxide (ohne V oder U)
J: Hydroxide mit H2O ± (OH), kantenverknüpfte Oktaeder
20:

Lapis Classification

IV/C.14-010

IV: OXIDE
C: Oxide mit Verhältnis Metall : Sauerstoff = 2:3 (M2O3 und verwandte Verbindungen)
14: Pyrochlor-Gruppe; MIKROLITH-Untergruppe [Ta ± Nb]

Classification by Hölzel

4.EA.200

4: OXIDES
E: R2O5 RO3 and others
A: R2O5oxides

Dana 8th edition

08.02.08.01

08: Multiple Oxides with Nb, Ta, and Ti
02: Multiple Oxides with Nb, Ta, and Ti where (A)2 (B2O6) (O,OH,F)

IMA status

diskreditiert IMA 16-C; CNMNC Newsletter No. 30, April 2016

Mineral status

Polytype

Variety / polytype of

Hydrokenomicrolite

Optical Properties

Color

blassrosa, weiß

RI value α / ω / n

2.0>

RI value γ / ε

2.0>

2V angle

Uniaxial

Crystallography

Cell parameters a (Å)

7.429

Cell parameters b (Å)

-

Cell parameters c (Å)

18.505

Cell parameters a/b or c/a

2.491

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

3

Volume (ų)

884.5

Physical Properties

Hardness (Mohs)

4

VHN (Hardness Vickers)

190 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

5.97 (berechnet)

6.145 ( ρ calc. Mineralienatlas )

References

16-C: Parabariomicrolite (discredited) Proposal 16-C is accepted, and parabariomicrolite is discredited. It corresponds to the polytype hydrokenomicrolite-3R. - CNMNC Newsletter No. 30, April 2016

Other languages

German

Hydrokenomikrolith-3R

Spanish

Parabariomicrolita

English

Parabariomicrolite

French

Parabariomicrolite

Russian

Парабариомикролит

old name

German

Parabariomikrolith

Alternative Name

Parabariomicrolite

German

Parabariomicrolith

CNMNC (IMA)-Number

IMA 1984-003

IDs

GUSID (Global unique identifier short form) _h5Q3LLPFkeoXFCpcPEQCg
GUID (Global unique identifier) DC501EFE-CFB2-4716-A85C-50A970F1100A
Database ID 2907