Voloshin, A.V., Pakhomovskii, Y.A., Tysheva, F.M. (1982) Calciotantite, CaTa4O11 - a new mineral from granitic pegmatites of the Kola Peninsula. Mineralogiceskij Zhurnal: 4: 75-79.

Classification of CalciotantiteHide

Strunz-mindat (2026):

4.DJ.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
J : With large (+- medium-sized) cations; polyhedral frameworks

Dana 8th ed.:

8.6.2.1

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
6 : (AB)₆O₁₁·nH₂O

Hey's CIM Ref.:

18.1.9

18 : Niobates and Tantalates
1 : Niobates and tantalates containing neither rare earths nor U

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Symbol	Source	Reference for Standard
Ctan	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of CalciotantiteHide

Lustre:

Adamantine

Transparency:

Transparent

Colour:

Colorless

Streak:

White

Hardness:

6½ on Mohs scale

Hardness:

VHN₂₀=1200 kg/mm² - Vickers

Cleavage:

None Observed

Density:

7.46 g/cm³ (Measured) 6.735 g/cm³ (Calculated)

Comment:

(Nb rich) to 7.40

Optical Data of CalciotantiteHide

Type:

Uniaxial

Reflectivity:

Wavelength	R₁ (%)	R₂ (%)
486nm	16.9%	16.3%
551nm	17.0%	16.6%
589nm	17.1%	16.7%
656nm	18.2%	18.0%

Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 18.2%.
R₁ shown in black, R₂ shown in red

Chemistry of CalciotantiteHide

Mindat Formula:

CaTa₄O₁₁

Element Weights:

Element	% weight
Ta	77.010 %
O	18.725 %
Ca	4.264 %

Calculated from ideal end-member formula.

Elements listed:

Ca, O, Ta - search for minerals with similar chemistry

Crystallography of CalciotantiteHide

Crystal System:

Hexagonal

Class (H-M):

622 - Trapezohedral

Space Group:

P6₃22

Cell Parameters:

a = 6.2261(6) Å, c = 12.280(1) Å

Ratio:

a:c = 1 : 1.972

Unit Cell V:

412.25 Å³ (Calculated from Unit Cell)

Crystal StructureHide

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0015587	Calciotantite	Yamnova N A, Pushcharovsky D Yu, Voloshin A V (1988) Identity of ungursaite with calciotantite and synthetic CaTa4O11 Soviet Physics Crystallography 33 498-499		1988	Kola Peninsula, Russia	0	293
0005632	Calciotantite	Cooper M A, Hawthorne F C, Cerny P (1999) Ta-Nb order in the crystal structure of niobium-rich calciotantite The Canadian Mineralogist 37 1289-1294		1999		0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Calciotantite'
loop_
_publ_author_name
'Yamnova N A'
'Pushcharovsky D Yu'
'Voloshin A V'
_journal_name_full 'Soviet Physics Crystallography'
_journal_volume 33 
_journal_year 1988
_journal_page_first 498
_journal_page_last 499
_publ_section_title
;
 Identity of ungursaite with calciotantite and synthetic CaTa4O11
 Note: displacement parameters taken from ICSD
;
_database_code_amcsd 0015587
_chemical_compound_source 'Kola Peninsula, Russia'
_chemical_formula_sum '(Ca.94 Na.06) Ta3.86 Nb.13 O10.97'
_cell_length_a 6.245
_cell_length_b 6.245
_cell_length_c 12.323
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 416.209
_exptl_crystal_density_diffrn      7.382
_symmetry_space_group_name_H-M 'P 63 2 2'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,x-y,1/2-z'
  'x-y,x,1/2+z'
  'y,x,-z'
  '-y,x-y,z'
  '-x+y,y,1/2-z'
  '-x,-y,1/2+z'
  '-x,-x+y,-z'
  '-x+y,-x,z'
  '-y,-x,1/2-z'
  'y,-x+y,1/2+z'
  'x-y,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
Ca   0.33333   0.66667   0.75000   0.94000   0.00443
Na   0.33333   0.66667   0.75000   0.06000   0.00443
Ta1   0.35897   0.00000   0.00000   1.00000   0.00236
Ta2   0.33333   0.66667   0.25000   0.86000   0.00279
Nb2   0.33333   0.66667   0.25000   0.13000   0.00279
O1   0.37500   0.94300   0.15540   0.99500   0.00507
O2   0.75700   0.00000   0.00000   1.00000   0.00127
O3   0.33333   0.66667   0.96630   1.00000   0.00127
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Ca 0.00405 0.00405 0.00507 0.00203 0.00000 0.00000
Na 0.00405 0.00405 0.00507 0.00203 0.00000 0.00000
Ta1 0.00329 0.00089 0.00241 0.00051 -0.00063 -0.00025
Ta2 0.00279 0.00279 0.00278 0.00139 0.00000 0.00000
Nb2 0.00279 0.00279 0.00278 0.00139 0.00000 0.00000
O1 0.00760 0.00633 0.00253 0.00507 0.00253 0.00380
O2 0.00253 0.00000 0.00253 0.00000 0.01140 0.00506
O3 0.00127 0.00127 0.00000 0.00076 0.00000 0.00000

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
3.02 Å	(100)
1.508 Å	(100)
2.78 Å	(90)
3.15 Å	(70)
1.793 Å	(70)
1.551 Å	(70)
2.47 Å	(60)

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Stage 4b: Highly evolved igneous rocks	>3.0
34 : Complex granite pegmatites

Type Occurrence of CalciotantiteHide

Type Locality:

ⓘ Vasin-Myl'k Mt, Voron'i Tundry, Murmansk Oblast, Russia

General Appearance of Type Material:

Calciotantite occurs as square to rectangular to hexagonal crystals 0.03-0.05 mm as inclusions in microlite or as veinlets 0.1-0.3 mm in microlite.

Place of Conservation of Type Material:

Geology Museum, Kola Branch, Academy of Sciences, Apatity, number 5702/1.
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, number 81392.

Geological Setting of Type Material:

In the albite-spodumene zone of granite pegmatites.

Associated Minerals at Type Locality:

Reference:

Voloshin, A.V., Pakhomovskii, Y.A., Tysheva, F.M. (1982) Calciotantite, CaTa4O11 - a new mineral from granitic pegmatites of the Kola Peninsula. Mineralogiceskij Zhurnal: 4: 75-79.

Synonyms of CalciotantiteHide

IMA1981-039

Other Language Names for CalciotantiteHide

Dutch:Calciotantiet

German:Calciotantit

Russian:Кальциотантит

Spanish:Calciotantita

Relationship of Calciotantite to other SpeciesHide

Member of:

Natrotantite Group

Other Members of Natrotantite Group:

Irtyshite	Na₂(Ta,Nb)₄O₁₁	Hex.
Natrotantite	Na₂Ta₄O₁₁	Trig. 3m(32/m) : R3c

Common AssociatesHide

Associations Based on Photo Data:

1 photo of Calciotantite associated with Tantalite-(Mn)	Mn²⁺Ta₂O₆
1 photo of Calciotantite associated with Stibiotantalite	Sb³⁺TaO₄
1 photo of Calciotantite associated with Microlite Group	A_2-mTa₂X_6-wZ_1-n

Related Minerals - Strunz-mindat Grouping Hide

4.DJ.05	Irtyshite	Na₂(Ta,Nb)₄O₁₁	Hex.
4.DJ.05	Natrotantite	Na₂Ta₄O₁₁	Trig. 3m(32/m) : R3c

Fluorescence of CalciotantiteHide

In UV light:

None

Other InformationHide

Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for CalciotantiteHide

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https://www.mindat.org/min-834.html
Please feel free to link to this page.

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External Links:

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Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

Mineral Dealers:

Buy from D. Joyce minerals

References for CalciotantiteHide

Reference List:

Voloshin, A.V., Pakhomovskii, Y.A., Tysheva, F.M. (1982) Calciotantite, CaTa4O11 - a new mineral from granitic pegmatites of the Kola Peninsula. Mineralogiceskij Zhurnal: 4: 75-79.

Dunn, Pete J., Fleischer, Michael, Burns, Roger G., Pabst, Adolf (1983) New mineral names. American Mineralogist, 68 (3-4) 471-475

Yamnova, N.A., Pushcharovskii, D.Y., Voloshin, A.V. (1998) Identity of ungursaite with calciotantite and synthetic CaTa4O11. Soviet Physics - Crystallography: 33: 498-499.

Cooper, M. A., Hawthorne, F. C., Černý, P. (1999) Ta–Nb order in the crystal structure of niobium-rich calciotantite. The Canadian Mineralogist, 37 (5) 1289-1294

(2021) Calciotantite. Handbook of Mineralogy. Mineralogical Society of America

Localities for CalciotantiteHide

Showing 6 localities.

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the

symbol to view information about a locality. The

symbol next to localities in the list can be used to jump to that position on the map.

Hide all sections | Show all sections

Locality ListHide

- This locality has map coordinates listed.

- This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality.

- Good crystals or important locality for species.

- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). ~~Struck out~~ - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.


Australia
Western Australia Port Hedland Shire Abydos Station Wodgina ⓘ Mount Cassiterite	Sweetapple et al. (2001)

DR Congo
Tanganyika ⓘ Manono-Kitotolo mine	Voloshin A.V. (1988)

Kazakhstan
East Kazakhstan Region Irtysh River ⓘ Ungursai Ta Deposit	Pekov (1998)

Russia (TL)
Murmansk Oblast Voron'i Tundry ⓘ Vasin-Myl'k Mt (TL)	Voloshin et al. (1982) +1 other reference

Sweden
Stockholm County Haninge Utö Utö Mines ⓘ Grundberg outcrop	Smeds et al. (1999) +1 other reference
ⓘ Nyköpingsgruvan	Cooper +1 other reference

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Calciotantite

About CalciotantiteHide

Unique IdentifiersHide

IMA Classification of CalciotantiteHide

Classification of CalciotantiteHide

Mineral SymbolsHide

Physical Properties of CalciotantiteHide

Optical Data of CalciotantiteHide

Chemistry of CalciotantiteHide

Crystallography of CalciotantiteHide

Crystal StructureHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of CalciotantiteHide

Synonyms of CalciotantiteHide

Other Language Names for CalciotantiteHide

Relationship of Calciotantite to other SpeciesHide

Common AssociatesHide

Related Minerals - Strunz-mindat GroupingHide

Fluorescence of CalciotantiteHide

Other InformationHide

Internet Links for CalciotantiteHide

References for CalciotantiteHide

Localities for CalciotantiteHide

Locality ListHide

Related Minerals - Strunz-mindat Grouping Hide