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Microlite group

Pictures (49 Images total)

Mikrolith
Views (File:
1279025244
): 2525
Mikrolith
Größe: 1,15 mm; Fundort: Alpe Rosso, Orcesco, Val Vigezzo, Piemont, Italien
Copyright: Matteo Chinellato; Contribution: Hg
Location: Italien/Piemont (Piemonte), Region/Verbano-Cusio-Ossola, Provinz/Druogno/Orcesco/Alpe Rosso
Mineral: Microlite group
Image: 1279025244
Rating: 10 (votes: 1)
License: Usage for Mineralienatlas project only
Mikrolith

Größe: 1,15 mm; Fundort: Alpe Rosso, Orcesco, Val Vigezzo, Piemont, Italien
Copyright: Matteo Chinellato
Contribution: Hg 2010-07-13
Locality: Alpe Rosso / Orcesco / Druogno / Verbano-Cusio-Ossola, Provinz / Piemont (Piemonte), Region / Italien
Fluornatromikrolith
Views (File:
1354894827
): 2265, Rating: 8.86
Fluornatromikrolith
Größe: 46x38x27 mm; Fundort: Shigar-Tal, Distrikt Skardu, Gilgit-Baltistan, Pakistan
Copyright: Watzl Minerals; Contribution: Philip Blümner
Location: Pakistan/Gilgit-Baltistan (Nordgebiete; Northern Areas)/Skardu, Distrikt/Shigar-Tal
Mineral: Fluornatromicrolite
Image: 1354894827
Rating: 8.86 (votes: 7)
License: Usage for Mineralienatlas project only
Fluornatromikrolith  D

Größe: 46x38x27 mm; Fundort: Shigar-Tal, Distrikt Skardu, Gilgit-Baltistan, Pakistan
Copyright: Watzl Minerals
Contribution: Philip Blümner 2012-12-07
Locality: Shigar-Tal / Skardu, Distrikt / Gilgit-Baltistan (Nordgebiete; Northern Areas) / Pakistan
Mikrolith
Views (File:
1266622611
): 3766, Rating: 8.75
Mikrolith
Größe: 0,73 mm; Fundort: Gang della Speranza (Filone della Speranza), San Piero in Campo, Campo nell'Elba, Insel Elba, Livorno, Toskana (Toscana), Italien
Copyright: Matteo Chinellato; Contribution: Hg
Collection: Domenico Preite
Location: Italien/Toskana (Toscana)/Livorno, Provinz/Elba, Insel/Campo nell'Elba/San Piero in Campo/Gang della Speranza (Filone della Speranza)
Mineral: Microlite group
Image: 1266622611
Rating: 8.75 (votes: 4)
License: Usage for Mineralienatlas project only
Mikrolith  D

Größe: 0,73 mm; Fundort: Gang della Speranza (Filone della Speranza), San Piero in Campo, Campo nell'Elba, Insel Elba, Livorno, Toskana (Toscana), Italien
Collection: Domenico Preite
Copyright: Matteo Chinellato
Contribution: Hg 2010-02-19
Locality: Gang della Speranza (Filone della Speranza) / San Piero in Campo / Campo nell'Elba / Elba, Insel / Livorno, Provinz / Toskana (Toscana) / Italien
Mikrolith mit Vanadinit
Views (File:
1279025320
): 2864
Mikrolith mit Vanadinit
Größe: 0,8 mm; Fundort: Alpe Rosso, Orcesco, Val Vigezzo, Piemont, Italien
Copyright: Matteo Chinellato; Contribution: Hg
Location: Italien/Piemont (Piemonte), Region/Verbano-Cusio-Ossola, Provinz/Druogno/Orcesco/Alpe Rosso
Mineral: Microlite group
Image: 1279025320
Rating: 9 (votes: 2)
License: Usage for Mineralienatlas project only
Mikrolith mit Vanadinit

Größe: 0,8 mm; Fundort: Alpe Rosso, Orcesco, Val Vigezzo, Piemont, Italien
Copyright: Matteo Chinellato
Contribution: Hg 2010-07-13
Locality: Alpe Rosso / Orcesco / Druogno / Verbano-Cusio-Ossola, Provinz / Piemont (Piemonte), Region / Italien
Mikrolith auf Albit
Views (File:
1259786136
): 3477
Mikrolith auf Albit
Bildbreite: 3 mm; Fundort: Urubu Mine, Itinga, Minas Gerais, Brasilien
Copyright: Dominik Schläfli; Contribution: Philip Blümner
Location: Brasilien/Südosten (Região Sudeste)/Minas Gerais/Itinga/Mina do Urubu
Mineral: Microlite group
Image: 1259786136
Rating: 9 (votes: 1)
License: Usage for Mineralienatlas project only
Mikrolith auf Albit

Bildbreite: 3 mm; Fundort: Urubu Mine, Itinga, Minas Gerais, Brasilien
Copyright: Dominik Schläfli
Contribution: Philip Blümner 2009-12-02
Locality: Mina do Urubu / Itinga / Minas Gerais / Südosten (Região Sudeste) / Brasilien

You find additional specimen at the Geolitho Museum

Collectors Summary

Color gelblichbraun, rötlichbraun, grünlich braun, grün, grau
Streak color hellgelb
Crystal System kubisch, Fd3m

Additional information / Summary

Das bisherige Mineral Mikrolith ist entweder Fluorcalciomikrolith oder Oxycalciomikrolith. Der Name Mikrolith steht für eine Gruppe von Mineralien.

Chemism

Chemical formula

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

Chemical composition

Calcium, Natrium, Tantal, Fluor, Sauerstoff, Wasserstoff

Unit weight: 529.017966725 u; Number of atoms in the formula: 11.3

Info

Empirical formula:

(Na0.75Ca0.25)2Ta2O6(O0.6(OH)0.3F0.1)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.06

0.3

2.65

1.0079470

0.3023841
Oxygen

O

20.87

6.9

61.06

15.9994300

110.3960670
Fluorine

F

0.36

0.1

0.88

18.9984033

1.8998403
Sodium

Na

6.52

1.5

13.27

22.9897702

34.4846553
Calcium

Ca

3.79

0.5

4.42

40.0784000

20.0392000
Tantalum

Ta

68.41

2

17.70

180.9479100

361.8958200

Classification by Hölzel

4.CI

4: OXIDES
C: R2O3 Sesquioxides
I: Microlite-Group, Ta-dominant on the B-site

IMA status

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

Mineral status

Reihe/Gruppe/Serie/Folge

IMA Classification

IMA Classification

 Pyrochlore supergroup

Optical Properties

Color

gelblichbraun, rötlichbraun, grünlich braun, grün, grau

Streak color

hellgelb

Optical Data Luminescence

Color LW-UV (365nm)

  

gelblich grün

Color SW-UV (254nm)

  

grün

Most Common Activator

(UO2)2+ (Uranyl-Ion) als Verunreinigungen

Other Activators

Dy3+, TiO6-Gruppe?

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

kubisch

Class (H-M)

m3m

Space Group number

227

Space Group

Fd3m

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

X-Ray Powder Diffraction

6.03(30),
3.153(20),
3.017(100),
2.611(20),
2.009(10),
1.845(20),
1.765(10),
1.573(10)
XRD chart Microlite group

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

(Co-)Type locality

(Co-)Type locality

USA/Massachusetts/Hampshire Co./Chesterfield/Clark-Ledge-Pegmatit

Preface

Author (Name, Year)

Shepard, 1835

References

American Mineralogist 62 (1977), 403

The Pyrochlore Supergroup of Minerals: Nomenclature; The Canadian Mineralogist Vol. 48, pp. 673-698 (2010)

Clarification of status of species in the pyrochlore supergroup; Mineralogical Magazine, 2013, Vol. 77(1), pp. 13–20

IMA group assignments

Varieties

Natrobistantite

Plumbomicrolite

Scandium microlite

Scandium Mikrolith = Sc-haltiges Mineral aus der Mikrolith-Gruppe

Stannomicrolite

Stibiomicrolite

Uranmicrolite

Other languages

English

Microlite group

German

Mikrolith-Gruppe

Russian

Микролит

Simplified Chinese

细晶石族

Japanese

ﾏｲｸﾛ石

old name

Microlit

Spanish

Microlita

French

Microlite groupe

Alternative Name

English

Haddamite

English

Metasimpsonite

Microlite

German

Mikrolith

German

Neotantalit

Spanish

Neotantalita

English

Neotantalite

Niobtantalpyrochlor

English

Niobtantalpyrochlore

Tantalpyrochlor

English

Tantalpyrochlore

Simplified Chinese

细晶石

CNMNC symbol

Symbol

Mic

Locations with GPS information

IDs

GUSID (Global unique identifier short form) Uddks6SfiEm-RP097m3lQQ
GUID (Global unique identifier) B364D751-9FA4-4988-BE44-FD3DEE6DE541
Database ID 2534