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Microlite group (Mikrolith-Gruppe)

Pictures (31 Images total)

Mikrolith
Views (Image: 1279025244): 2183
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 / Vigezzo, Valle (Tal) / Verbano-Cusio-Ossola, Provinz / Piemont (Piemonte), Region / Italien
Mikrolith
Views (Image: 1266622611): 3458, 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

Collection: Domenico Preite
Copyright: Matteo Chinellato
Contribution: Hg 2010-02-20
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 (Image: 1279025320): 2607
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 / Vigezzo, Valle (Tal) / Verbano-Cusio-Ossola, Provinz / Piemont (Piemonte), Region / Italien
Mikrolith auf Albit
Views (Image: 1259786136): 3118
Mikrolith auf Albit

Bildbreite: 3 mm; Fundort: Urubu Mine, Itinga, Minas Gerais, Brasilien

Copyright: Dominik Schläfli
Contribution: slugslayer 2009-12-02
Locality: Mina do Urubu / Itinga / Jequitinhonha, Fluss / Minas Gerais / Südosten (Região Sudeste) / Brasilien
Mikrolith
Views (Image: 1373276451): 2318
Mikrolith

Größe: 2,21 mm; Fundort: Grotta d'Oggi, San Piero in Campo, Campo nell'Elba, Insel Elba, Livorno, Toskana (Toscana), Italien

Copyright: Matteo Chinellato
Contribution: Hg 2013-07-08
Locality: Grotta d'Oggi / San Piero in Campo / Campo nell'Elba / Elba, Insel / Livorno, Provinz / Toskana (Toscana) / Italien
Mikrolith
Views (Image: 1219849409): 1443
Mikrolith

Größe: 1,41 mm; Fundort: Grotta d'Oggi, San Piero in Campo, Campo nell'Elba, Insel Elba, Livorno, Toskana (Toscana), Italien

Copyright: Matteo Chinellato
Contribution: Hg 2008-08-27
Locality: Grotta d'Oggi / San Piero in Campo / Campo nell'Elba / Elba, Insel / Livorno, Provinz / Toskana (Toscana) / Italien

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

Preface

Author (Name, Year)

Shepard, 1835

IMA group assignments

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Fluornatromicrolite

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

kubisch : m3m : Fd3m

4.CI.020

Fluorcalciomicrolite

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

kubisch : m3m : Fd3m

4.CI.120

Oxycalciomicrolite

Ca2Ta2O7

kubisch : m3m : Fd3m

4.CI.140

Tazzoliite

Ba4-xNaxTi2Nb3SiO17[PO2(OH)2]x(OH)(1-2x) (0≤x≤0.5)

orthorhombisch : mmm : Fmmm

4.CI.150

Oxystannomicrolite

Sn2Ta2O6O

kubisch : m3m : Fd3m

4.CI.240

'Plumbomicrolite' (Var.v. Microlite group)

(Pb,Na,Ca)2(Ta,Nb)2(O,OH)7

kubisch : m3m : Fd3m

4.CI.411

Kenoplumbomicrolite

(Pb,◻)2Ta 2O6(◻,O,OH)

kubisch : m3m : Fd3m

4.CI.480

Oxystibiomicrolite

(Sb3+,Ca)2Ta2O6O

4.CI.540

Hydromicrolite

(H2O,◻)2Ta2(O,OH)6(H2O)

4.CI.860

'Uranmicrolite' (Var.v. Microlite group)

(Ca,U)2(Ta,Nb)2O6(OH,F)

kubisch : m3m : Fd3m

4.CI.911

'Bismutomicrolite'

(Bi,Ca)(Ta,Nb)2O6(OH)

kubisch : m3m : Fd3m

4.CI.912

Hydrokenomicrolite

(◻,H2O)2Ta2(O,OH)6(H2O)

kubisch : m3m : Fd3m

4.CI.960

'Bariomicrolite'

Ba(Ta,Nb)2(O,OH)7

kubisch : m3m : Fd3m

4.CI.961

'Natrobistantite' (Var.v. Microlite group)

(Na,Cs)Bi(Ta,Nb,Sb)4O12

4.CI.981

Varieties

Natrobistantite

Plumbomicrolite

Scandium microlite

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

Stannomicrolite

Stibiomicrolite

Uranmicrolite

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

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Mikrolith-Gruppe
Google-Bilder-Suche - search for: Mikrolith-Gruppe
Mineralogisch-Petrographisches-Institut Hamburg - search for: Mikrolith-Gruppe

English pages

Mindat - search for: Microlite group
Webmineral - search for:Microlite group
Handbook-of-Mineralogy - search for: Microlite group
RRUFF - Raman, XRD and other mineral data - search for: Microlite group
RRUFF - References and PDF downloads - search for: Microlite group
American-Mineralogist-Crystal-Structure-Database - search for: Microlite group
Athena - search for: Microlite group

Russian pages

Webmineral.ru - search for: Микролит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Mikrolith-Gruppe
Crystal-Treasure.com - search for: Mikrolith-Gruppe
Bosse - search for: Mikrolith-Gruppe

Locations with GPS information