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Hydroxykenomicrolite

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Hydroxykenomikrolith
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Hydroxykenomikrolith

beige Kristalle von Hydroxykenomikrolith, Vasin-Myl'k, Voron'i Tundry, Kola, Russland; BB 8 mm

Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-02-09
Locality: Vasin-Myl'k, Berg / Voron'i Tundry / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland

Collectors Summary

Hardness (Mohs) 6.5
Crystal System kubisch, Fd3m

Chemism

Chem­ical formula

(◻,Na,Sb3+)2Ta2O6(OH)

Empir­ical formula (anal­y­sis)

[Cs0.31(OH,F)0.69](Sb0.57Na0.31Pb0.02Bi0.01)(Ta1.88Nb0.12)[O5.69(OH,F)0.31]

Addi­tional chem. informa­tion

weitere Analyse: [Cs0.22K0.01(OH,F)0.55](Na0.45Sb0.40Pb0.14Ca0.06Bi0.02Sn0.01)(Ta1.95Nb0.05)[O5.78(OH,F)0.22]

Chem­ical com­po­si­tion

Antimon, Natrium, Tantal, Sauerstoff, Wasserstoff

Unit weight: 583.8375066045 u; Number of atoms in the formula: 10.66

Info

Empirical formula:

[Cs0.31((OH)0.75F0.25)0.69](Sb0.57Na0.31Pb0.02Bi0.01)(Ta1.88Nb0.12)[O5.69((OH)0.75F0.25)0.31]

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.13

0.75

7.04

1.0079470

0.7559603

Oxygen

O

17.65

6.44

60.41

15.9994300

103.0363292

Fluorine

F

0.81

0.25

2.35

18.9984033

4.7496008

Sodium

Na

1.22

0.31

2.91

22.9897702

7.1268288

Niobium

Nb

1.91

0.12

1.13

92.9063820

11.1487658

Antimony

Sb

11.89

0.57

5.35

121.7601000

69.4032570

Caesium

Cs

7.06

0.31

2.91

132.9054520

41.2006901

Tantalum

Ta

58.27

1.88

17.64

180.9479100

340.1820708

Lead

Pb

0.71

0.02

0.19

207.2100000

4.1442000

Bismuth

Bi

0.36

0.01

0.09

208.9803820

2.0898038

Anal­y­sis wt%

Ø Ta2O5 : 71.49, Nb2O5 : 2.37, Sb2O3 : 13.20, Bi2O3 : 0.64, Cs2O : 7.60, Na2O : 1.24, PbO : 2.29 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 81)

Strunz 9th edi­tion incl. updates

4.DH.15

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
15:Pyrochlor-Gruppe

Lapis Clas­sifica­tion

IV/C.13-100

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

IMA sta­tus

anerkannt (2010) - The Canadian Mineralogist Vol. 48, pp. 673-698 (2010)

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Pyrochlore supergroup  ⇒ Microlite group

Optical Properties

RI value α / ω / n

1.8>

Ri mean

1.8>

2V angle

Isotropisch

Crystallography

Crystal Sys­tem

kubisch

Class (H-M)

m3m

Space Group number

227

Space Group

Fd3m

Cell param­e­ters a (Å)

10.522

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

-

Cell param­e­ters a/b or c/a

1

Cell param­e­ters c/b

-

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

8

Volumne (ų)

1164.917

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

6.5

VHN (Hard­ness Vick­ers)

925 (40g)

Density (g/cm³)

6.49 (berechnet) 6.4 - 6.6 (gemessen)

6.657 ( ρ calc. Mineralienatlas )

Preface

Asso­cia­tions

Simpsonit, Stibiotantalit, Mikrolith, Wodginit, Tantalit, Pollucit, Sosedkoit (Kola-Halbinsel, Russland); Kimrobinsonit, Manganotantalit (Mt. Holland, West-Australien)

IMA group assignments

 
A2-mD2X6-wZ1-n
 
 

 
 
(Na,Ca)2Ta2O6(O,OH,F)
kubisch
Fd3m

 
 
 
(Ca,Na)2Ta2(O,OH)6F
kubisch
Fd3m

 
 
 
(Na,Ca,Bi)2(Ta,Nb)2O6F
kubisch
Fd3m

 
 
 
(◻,H2O)2Ta2(O,OH)6(H2O)
kubisch
Fd3m

 
 
 
(H2O,◻)2Ta2(O,OH)6(H2O)
 
 

 
 
 
Ca1.5Ta2O6(OH)
kubisch
P4332

 
 
 
(◻,Na,Sb3+)2Ta2O6(OH)
kubisch
Fd3m

 
 
 
(Pb,◻)2Ta 2O6(◻,O,OH)
kubisch
Fd3m

 
 
 
(Bi1.33☐0.67)Σ2Ta2O6O
kubisch
Fd3m

 
 
 
Ca2Ta2O7
kubisch
Fd3m

 
 
 
(Na,Ca,U)2(Ta,Nb)2O6(O,F)
kubisch
Fd3m

 
 
 
Sn2Ta2O6O
kubisch
Fd3m

 
 
 
(Sb3+,Ca)2Ta2O6O
 
 

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Actuality: 07. Jul 2022 - 18:17:42

Other languages

English

Hydroxykenomicrolite

German

Hydroxykenomikrolith

Russian

Гидроксикеномикролит

CNMNC symbol

Symbol

Hykmic

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