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Calciotantite

Pictures (2 Images total)

Calciotantit
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Calciotantit

weißer Calciotantit in Tantalit, Vuoriyarvi, Kola, Russland; BB 2 mm

Copyright: Joy Desor
Contribution: openpit 2020-02-09
Locality: Vuorijärvi-Massiv (Vuoriyarvi) / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland
Calciotantit
Views (Image: 1608203708): 148
Calciotantit

Derber weisser Calciotantit umrahmt von; feinkristallinen Mikrolith; Schönficht,Oberpfalz; BB: 5 mm

Collection: Rockhounder
Copyright: Rockhounder
Contribution: Rockhounder 2020-12-17
Locality: Schönficht / Tirschenreuth, Landkreis / Oberpfalz, Bezirk / Bayern / Deutschland

Collectors Summary

Color farblos
Streak color weiß
Hardness (Mohs) 6.50 - 7.00
Crystal System hexagonal, P6322

Chemism

Chem­ical formula

CaTa4O11

Chem­ical com­po­si­tion

Calcium, Tantal, Sauerstoff

Unit weight: 939.86377 u; Number of atoms in the formula: 16

Info

Empirical formula:

CaTa4O11

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

18.73

11

68.75

15.9994300

175.9937300

Calcium

Ca

4.26

1

6.25

40.0784000

40.0784000

Tantalum

Ta

77.01

4

25.00

180.9479100

723.7916400

Anal­y­sis wt%

Ta2O5 : 91.09, Nb2O5 : 2.84, CaO : 6.05 (Ref: Mineralogicheskii Zhurnal 82)

Strunz 9th edi­tion incl. updates

4.DJ.05

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
D: Metall: Sauerstoff = 1:2 und vergleichbare
J: Mit großen (± mittelgroßen) [Kationen]; vielgestaltige (polyhedrale) Gerüste
05:Natrotantit-Gruppe

Lapis Clas­sifica­tion

IV/D.26-040

IV: OXIDE
D: Oxide mit Verhältnis Metall : Sauerstoff = 1:2 (MO2 und verwandte Verbindungen)

Clas­sifica­tion by Hölzel

4.DJ.540

4: OXIDES
D: Dioxides
J: Titanates, Niobates and Tantalates, C large, V medium ò 2
5: Other Niobates, Tantalates

Hey's Chem­ical Index of Min­er­als

08.01.09

08: Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
01: Halides of the alkali metals and ammonium

Dana 8th edi­tion

08.06.02.01

08: Multiple Oxides with Nb, Ta, and Ti
06: Multiple Oxides with Nb, Ta, and Ti
02: Calciotantite Group

IMA sta­tus

anerkannt

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

farblos

Streak color

weiß

RI value α / ω / n

2.178

Ri mean

2.178

2V angle

Uniaxial

Crystallography

Crystal Sys­tem

hexagonal

Class (H-M)

622

Space Group number

182

Space Group

P6322

Cell param­e­ters a (Å)

6.23

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

12.22

Cell param­e­ters a/b or c/a

1.961

Cell param­e­ters c/b

-

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

120°

Z

2

Volumne (ų)

410.75

X-Ray Pow­der Diffrac­tion

6.108(50),
3.115(70),
3.018(100),
2.775(90),
2.467(60),
1.798(70),
1.549(70),
1.509(100)

XRD chart Calciotantite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

6.50 - 7.00

VHN (Hard­ness Vick­ers)

970 (40g)

Density (g/cm³)

7.46 (berechnet)

7.599 ( ρ calc. Mineralienatlas )

Preface

Author (Name, Year)

Voloshin & Pakhomovskiy & Tysheva, 1982

References

American Mineralogist: 68: 471.

Mineralogicheskiy Zhurnal 4 (1982) (3), 75

Strunz Mineralogical Tables 9. Edition (2001), 226.

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Irtyshite

Na2(Ta,Nb)4O11

hexagonal : 6/m, 6 : P63/m, P63

4.DJ.05

'Ungursaite'

Ca(Ta,Nb)4O11

hexagonal : 6, 6/m : P63, P63/m

4.DJ.05

Natrotantite

Na2Ta4O11

trigonal : 3m : R3c

4.DJ.05

Calciotantite

CaTa4O11

hexagonal : 622 : P6322

4.DJ.05

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

Lithiotantite

Li(Ta,Nb)3O8

monoklin : 2/m : P21/c

IV/D.26-010

Natrotantite

Na2Ta4O11

trigonal : 3m : R3c

IV/D.26-020

Irtyshite

Na2(Ta,Nb)4O11

hexagonal : 6/m, 6 : P63/m, P63

IV/D.26-030

Calciotantite

CaTa4O11

hexagonal : 622 : P6322

IV/D.26-040

Cesplumtantite

(Cs,Na)2(Pb,Sb3+)3Ta8O24

IV/D.26-060

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

Irtyshite

Na2(Ta,Nb)4O11

hexagonal : 6/m, 6 : P63/m, P63

4.DJ.500

Cesplumtantite

(Cs,Na)2(Pb,Sb3+)3Ta8O24

4.DJ.510

'Ungursaite'

Ca(Ta,Nb)4O11

hexagonal : 6, 6/m : P63, P63/m

4.DJ.530

Calciotantite

CaTa4O11

hexagonal : 622 : P6322

4.DJ.540

Petscheckite

U4+Fe2+Nb2O8

trigonal : 3m : P31m

4.DJ.560

Liandratite

U6+(Nb,Ta)2O8

trigonal : 3m : P31m

4.DJ.570

Murataite-(Y)

(Y,Na)6(Zn,Fe3+)5(Ti,Nb)12(O,F,OH)43

kubisch : 43m : F43m

4.DJ.580

Changbaiite

PbNb2O6

trigonal : 3m : R3m

4.DJ.590

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Franconite

Na2Nb4O11·9H2O

08.06.01.01

Hochelagaite

(Ca,Na,Sr)Nb4O11·8H2O

08.06.01.02

Ternovite

MgNb4O11·8-12H2O

monoklin : 2, m, 2/m : P2, Pm, P2/m

08.06.01.03

Calciotantite

CaTa4O11

hexagonal : 622 : P6322

08.06.02.01

Natrotantite

Na2Ta4O11

trigonal : 3m : R3c

08.06.02.02

Irtyshite

Na2(Ta,Nb)4O11

hexagonal : 6/m, 6 : P63/m, P63

08.06.02.03

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

Villiaumite

NaF

kubisch : m3m : Fm3m

08.01.02

Calciotantite

CaTa4O11

hexagonal : 622 : P6322

08.01.09

CNMNC (IMA)-Number

IMA 1981-039

CNMNC symbol

Symbol

Ctan

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

German pages

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

English pages

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

Russian pages

Webmineral.ru - search for: Кальциотантит

Mineral Dealer

German pages

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Crystal-Treasure.com - search for: Calciotantit
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Locations with GPS information