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Fluorcalciomicrolite

Collectors Summary

Crystal System kubisch, Fd3m

Chemism

Chem­ical formula

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

Addi­tional chem. informa­tion

Pyrochlore Supergruppe

Chem­ical com­po­si­tion

Calcium, Natrium, Tantal, Fluor, Sauerstoff, Wasserstoff

Unit weight: 550.01520885 u; Number of atoms in the formula: 12.5

Info

Empirical formula:

(Ca0.75Na0.25)2Ta2(O0.75(OH)0.25)6F

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.27

1.5

12.00

1.0079470

1.5119205

Oxygen

O

17.45

6

48.00

15.9994300

95.9965800

Fluorine

F

3.45

1

8.00

18.9984033

18.9984033

Sodium

Na

2.09

0.5

4.00

22.9897702

11.4948851

Calcium

Ca

10.93

1.5

12.00

40.0784000

60.1176000

Tantalum

Ta

65.80

2

16.00

180.9479100

361.8958200

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.13-022

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

Clas­sifica­tion by Hölzel

4.CI.120

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

IMA sta­tus

anerkannt (2010) - The Canadian Mineralogist Vol. 48, pp. 673-698 (2010)
anerkannt August 2012 - CNMNC Newsletter No. 14, October 2012, page 1282; Mineralogical Magazine, 76, 1281-1288

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Pyrochlore supergroup  ⇒ Microlite group

Optical Properties

Crystallography

Crystal Sys­tem

kubisch

Class (H-M)

m3m

Space Group number

227

Space Group

Fd3m

Cell param­e­ters a (Å)

10.419

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)

1131.04

Kristall struc­ture

Struktur bestimmt

X-Ray Pow­der Diffrac­tion

5.997(59), 3.138(83), 3.005(100), 2.602(29), 2.004(23), 1.841(23), 1.589(25), 1.504(24)

XRD chart Fluorcalciomicrolite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

6.46 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Brasilien/Südosten (Região Sudeste)/Minas Gerais/Nazareno/Volta Grande Pegmatit

Type mate­r­ial

Museu de Geociências, Instituto de Geociências, Universidade de São Paulo, São Paulo, Brasilien

Col­lec­tion number of type mate­r­ial

DR731

Preface

Author (Name, Year)

Marcelo B. Andrade, Daniel Atencio, Hexiong Yang, Robert T. Downs, Aba I.C. Persiano und Javier Ellena (2012)

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: 24. Jun 2022 - 07:03:29

Other languages

English

Fluorcalciomicrolite

German

Fluorcalciomikrolith

Russian

Фторкальциомикролит

CNMNC (IMA)-Number

IMA 2012-036

CNMNC symbol

Symbol

Fcmic

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