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Schiavinatoite

A valid IMA mineral species

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Photos of Schiavinatoite (14)

Schiavinatoite Gallery Search Photos of Schiavinatoite

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Schiavinatoite, etc.

Antsongombato gem mine, Antsentsindrano, Anosiarivo Manapa, Betafo District, Vakinankaratra, Madagascar

Schiavinatoite

Antsongombato gem mine, Antsentsindrano, Anosiarivo Manapa, Betafo District, Vakinankaratra, Madagascar

Schiavinatoite, etc.

Ampanodiana South pegmatite, Tetezantsio-Andoabatokely Pegmatite Field, Andrembesoa, Betafo District, Vakinankaratra, Madagascar

Schiavinatoite, etc.

Ampanodiana South pegmatite, Tetezantsio-Andoabatokely Pegmatite Field, Andrembesoa, Betafo District, Vakinankaratra, Madagascar

Schiavinatoite, etc.

Antsongombato gem mine, Antsentsindrano, Anosiarivo Manapa, Betafo District, Vakinankaratra, Madagascar

Schiavinatoite

Antsongombato gem mine, Antsentsindrano, Anosiarivo Manapa, Betafo District, Vakinankaratra, Madagascar

Schiavinatoite, etc.

Ampanodiana South pegmatite, Tetezantsio-Andoabatokely Pegmatite Field, Andrembesoa, Betafo District, Vakinankaratra, Madagascar

Schiavinatoite, etc.

Ampanodiana South pegmatite, Tetezantsio-Andoabatokely Pegmatite Field, Andrembesoa, Betafo District, Vakinankaratra, Madagascar

Schiavinatoite, etc.

Antsongombato gem mine, Antsentsindrano, Anosiarivo Manapa, Betafo District, Vakinankaratra, Madagascar

Schiavinatoite

Antsongombato gem mine, Antsentsindrano, Anosiarivo Manapa, Betafo District, Vakinankaratra, Madagascar

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About SchiavinatoiteHide

Giuseppe Schiavinato

Formula:

(Nb,Ta)(BO₄)

Colour:

Pink, greyish

Lustre:

Vitreous

Hardness:

Specific Gravity:

6.548 (Calculated)

Crystal System:

Tetragonal

Name:

For the Italian mineralogist, Giuseppe Schiavinato (Padua 10 December 1915 - Milano 25 June 1996), who supported the advancement of mineralogy in Italy.

Type Locality:

ⓘ Antsongombato gem mine, Antsentsindrano, Anosiarivo Manapa, Betafo District, Vakinankaratra, Madagascar

The niobium analogue of béhierite. Forms a series with béhierite. Second mineral with essential Nb and B after nioboholtite.
Occurs intimately associated with Nb-rich béhierite, as portions in bipyramidal crystals.

Béhierite-schiavinatoite crystals may have a black encrusting of rynersonite. The crystals may be partially altered into microlite group or rynersonite (or vigezzite) (Pezzotta 2007).

Possibly crystallochemically related to xenotime-(Y) (Ondrejka et al., 2022).

Unique IdentifiersHide

Mindat ID:

7110

Long-form identifier:

mindat:1:1:7110:5

GUID
(UUID V4):

3df86b68-97f3-4c7a-a4a7-aa380fcc4024

IMA Classification of SchiavinatoiteHide

IMA status:

Approved

IMA Formula:

Nb(BO₄)

Approval year:

1999

First published:

2001

Type description reference:

Demartin, Francesco, Diella, Valeria, Gramaccioli, Carlo M., Pezzotta, Federico (2001) Schiavinatoite, (Nb,Ta)BO4, the Nb analogue of behierite. European Journal of Mineralogy, 13 (1) 159-165 doi:10.1127/0935-1221/01/0013-0159

Classification of SchiavinatoiteHide

Strunz-mindat (2024):

6.AC.15

6 : BORATES
A : Monoborates
C : B(O,OH)₄, without and with additional anions; 1(T), 1(T)+OH, etc

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
Shv	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 SchiavinatoiteHide

Lustre:

Vitreous

Transparency:

Transparent

Colour:

Pink, greyish

Comment:

Colorless in thin section

Streak:

White

Hardness:

8 on Mohs scale

Cleavage:

None Observed

Density:

6.548 g/cm³ (Calculated)

Optical Data of SchiavinatoiteHide

Type:

Uniaxial (+)

RI values:

n_ε = 2.300

Max Birefringence:

δ = 0.000

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Surface Relief:

Moderate

Chemistry of SchiavinatoiteHide

Mindat Formula:

(Nb,Ta)(BO₄)

Elements listed:

B, Nb, O, Ta - search for minerals with similar chemistry

Crystallography of SchiavinatoiteHide

Crystal System:

Tetragonal

Class (H-M):

4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal

Space Group:

I4₁/amd

Cell Parameters:

a = 6.219(5) Å, c = 5.487(5) Å

Ratio:

a:c = 1 : 0.882

Unit Cell V:

212.21 Å³ (Calculated from Unit Cell)

Morphology:

As portions in behierite crystals. Forms observed on the crystal: tetragonal bipyramid, a tetragonal prism.

Twinning:

None observed

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)
0006854	Schiavinatoite	Demartin F, Diella V, Gramaccioli C M, Pezzotta F (2001) Schiavinatoite, (Nb,Ta)BO4, the Nb analogue of behierite European Journal of Mineralogy 13 159-165		2001		0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Schiavinatoite'
loop_
_publ_author_name
'Demartin F'
'Diella V'
'Gramaccioli C M'
'Pezzotta F'
_journal_name_full 'European Journal of Mineralogy'
_journal_volume 13 
_journal_year 2001
_journal_page_first 159
_journal_page_last 165
_publ_section_title
;
 Schiavinatoite, (Nb,Ta)BO4, the Nb analogue of behierite
;
_database_code_amcsd 0006854
_chemical_formula_sum '(Nb.52 Ta.48) B O4'
_cell_length_a 6.219
_cell_length_b 6.219
_cell_length_c 5.487
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 212.215
_exptl_crystal_density_diffrn      6.572
_symmetry_space_group_name_H-M 'I 41/a m d'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,1/2+z'
  '-y,1/2-x,1/4+z'
  '1/2-y,-x,3/4+z'
  '1/2+y,1/2+x,1/2-z'
  '+y,+x,-z'
  '1/2+y,1/2-x,1/2-z'
  '+y,-x,-z'
  '-y,1/2+x,1/4+z'
  '1/2-y,+x,3/4+z'
  '1/2+x,1/2-y,1/2+z'
  '+x,-y,+z'
  '1/2-x,y,3/4-z'
  '-x,1/2+y,1/4-z'
  '1/2+x,y,3/4-z'
  '+x,1/2+y,1/4-z'
  '1/2-x,1/2-y,1/2+z'
  '-x,-y,+z'
  '1/2+y,x,3/4+z'
  '+y,1/2+x,1/4+z'
  '-y,-x,-z'
  '1/2-y,1/2-x,1/2-z'
  '-y,x,-z'
  '1/2-y,1/2+x,1/2-z'
  '1/2+y,-x,3/4+z'
  '+y,1/2-x,1/4+z'
  '-x,y,z'
  '1/2-x,1/2+y,1/2+z'
  'x,1/2-y,1/4-z'
  '1/2+x,-y,3/4-z'
  '-x,1/2-y,1/4-z'
  '1/2-x,-y,3/4-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
NbM   0.00000   0.00000   0.00000   0.52000   0.00325
TaM   0.00000   0.00000   0.00000   0.48000   0.00325
B   0.00000   0.00000   0.50000   1.00000   0.00557
O   0.00000   0.17920   0.32390   1.00000   0.00481
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
NbM 0.00328 0.00328 0.00322 0.00000 0.00000 0.00000
TaM 0.00328 0.00328 0.00322 0.00000 0.00000 0.00000
B 0.00600 0.00600 0.00600 0.00000 0.00000 0.00000
O 0.00750 0.00260 0.00410 0.00000 0.00000 0.00040

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
4.115 Å	(100)
3.110 Å	(84)
2.481 Å	(36)
2.328 Å	(49)
1.939 Å	(29)
1.646 Å	(25)
1.598 Å	(42)

Comments:

Very close to béhierite.

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 SchiavinatoiteHide

Type Locality:

ⓘ Antsongombato gem mine, Antsentsindrano, Anosiarivo Manapa, Betafo District, Vakinankaratra, Madagascar

General Appearance of Type Material:

As a small portion of a greyish pink well-formed flattened bipyramidal Nb-rich behierite crystal (4mm large)

Place of Conservation of Type Material:

Collection of the Museo Civico di Storia Naturale, Milane, Italy. MSNM M31137.

Empirical Formula of Type Material:

(Nb_0.52Ta_0.48 ) Σ_1.00BO₄

Chemical Analysis of Type Material:

B₂O₃	16.60 %
Nb₂O₅	33.08 %
Ta₂O₅	50.37 %
Total:	100.05 %

Geological Setting of Type Material:

In the highly evolved portion of a LCT granite pegmatite dyke of danburite subtype.

Associated Minerals at Type Locality:

Xenotime	Tourmaline	Tantalite-(Mn)	Pollucite	Monazite
Microlite Group	Londonite-Rhodizite Series	Hübnerite	Danburite	Columbite-(Mn)
Beryl	Béhierite

Reference:

Demartin, F., Diella, V., Gramaccioli, C. M., Pezzotta, F. (2001) Schiavinatoite, (Nb,Ta)BO4, the Nb analogue of behierite. European Journal of Mineralogy: 13: 159-165.

Download:

http://rruff.info/rruff_1.0/uploads/EJM13_159.pdf

Synonyms of SchiavinatoiteHide

IMA1999-051

Other Language Names for SchiavinatoiteHide

German:Schiavinatoit

Russian:Скиавинатоит

Spanish:Schiavinatoita

Common AssociatesHide

Associated Minerals Based on Photo Data:

6 photos of Schiavinatoite associated with Rynersonite	CaTa₂O₆
6 photos of Schiavinatoite associated with Béhierite	(Ta⁵⁺,Nb⁵⁺)(BO₄)
5 photos of Schiavinatoite associated with Tourmaline	AD₃G₆ (T₆O₁₈)(BO₃)₃X₃Z
4 photos of Schiavinatoite associated with Quartz	SiO₂
3 photos of Schiavinatoite associated with Microcline	K(AlSi₃O₈)
2 photos of Schiavinatoite associated with Danburite	CaB₂Si₂O₈
2 photos of Schiavinatoite associated with Smoky Quartz	SiO₂
2 photos of Schiavinatoite associated with Elbaite	Na(Li_1.5Al_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
2 photos of Schiavinatoite associated with Albite	Na(AlSi₃O₈)
2 photos of Schiavinatoite associated with Elbaite-Liddicoatite Series

Related Minerals - Strunz-mindat Grouping Hide

6.AC.05	Sinhalite	MgAl(BO₄)	Orth. mmm (2/m 2/m 2/m)
6.AC.10	Pseudosinhalite	Mg₂Al₃(BO₃)₂(OH)O₃	Mon. 2/m : P2₁/b
6.AC.15	Béhierite	(Ta⁵⁺,Nb⁵⁺)(BO₄)	Tet. 4/mmm (4/m 2/m 2/m) : I4₁/amd
6.AC.20	Frolovite	Ca[B(OH)₄]₂	Tric. 1 : P1
6.AC.25	Hexahydroborite	Ca[B(OH)₄]₂ · 2H₂O or CaB₂O₄ · 6H₂O	Mon. 2/m : B2/b
6.AC.30	Henmilite	Ca₂Cu[B(OH)₄]₂(OH)₄	Tric. 1 : P1
6.AC.35	Bandylite	Cu[B(OH)₄]Cl	Tet. 4/mmm (4/m 2/m 2/m) : P4/nmm
6.AC.40	Teepleite	Na₂[B(OH)₄]Cl	Tet. 4/mmm (4/m 2/m 2/m) : P4/nmm
6.AC.45	Moydite-(Y)	Y[B(OH)₄](CO₃)	Orth. mmm (2/m 2/m 2/m) : Pbca
6.AC.50	Carboborite	Ca₂Mg[B(OH)₄]₂(CO₃)₂ · 4H₂O	Mon. 2/m
6.AC.55	Sulfoborite	Mg₃[B(OH)₄]₂(SO₄)(OH,F)₂	Orth. mmm (2/m 2/m 2/m) : Pnma
6.AC.60	Lüneburgite	Mg₃[B₂(OH)₆](PO₄)₂ · 6H₂O	Tric. 1 : P1
6.AC.65	Seamanite	Mn²⁺₃[B(OH)₄](PO₄)(OH)₂	Orth. mmm (2/m 2/m 2/m)
6.AC.70	Cahnite	Ca₂[B(OH)₄](AsO₄)	Tet. 4 : P4

Fluorescence of SchiavinatoiteHide

In UV light:

None fluoresecence under both short and long wave UV light.

Other InformationHide

IR Spectrum:

Ampanodiana North pegmatite material [cm^-1]: 3260w, 1062s, 920sh, 865s, 581, 504s, 470sh

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 SchiavinatoiteHide

mindat.org URL:

https://www.mindat.org/min-7110.html
Please feel free to link to this page.

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External Links:

Look for Schiavinatoite on Webmineral

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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

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References for SchiavinatoiteHide

Reference List:

Grew, Edward S., Anovitz, Lawrence M., Grew, Edward S., Anovitz, Lawrence M. - Eds. (1996) Boron - Mineralogy, Petrology and Geochemistry. Reviews in Mineralogy Vol. 33. Mineralogical Society of America

Gramaccioli, C.M. (2000) Un nuovo minerale: la Schiavinatoite. Rendiconti Lincei - Scienze Fisiche e Naturali, 11 (4) 197-199

Jambor, J.L., Roberts, A.C. (2001) New mineral names. American Mineralogist, 86. 1534-1537

Mandarino, Joseph A. (2001) New minerals. The Canadian Mineralogist, 39 (5) 1473-1502 doi:10.2113/gscanmin.39.5.1473

Pezzotta, Federico (2007) Ta-Nb borates and other rare accessory phases in granitic pegmatites of the Itremo region, central Madagascar. Norsk Bergverksmuseum Skrift, 35. 97-98

Chukanov, Nikita V. (2014) Infrared spectra of mineral species Vol. 1 - Springer Geochemistry/Mineralogy. Springer Netherlands. doi:10.1007/978-94-007-7128-4

Ondrejka, Martin, Molnárová, Alexandra, Putiš, Marián, Bačík, Peter, Uher, Pavel, Voleková, Bronislava, Milovská, Stanislava, Mikuš, Tomáš, Pukančík, Libor (2022) Hellandite-(Y)–hingganite-(Y)–fluorapatite retrograde coronae: a novel type of fluid-induced dissolution–reprecipitation breakdown of xenotime-(Y) in the metagranites of Fabova Hoľa, Western Carpathians, Slovakia. Mineralogical Magazine, 86 (4) 586-605 doi:10.1180/mgm.2022.7

forum.amiminerals.it (2023) http://forum.amiminerals.it/viewtopic.php?f=5&t=17572

(2023) Schiavinatoite. Handbook of Mineralogy. Mineralogical Society of America

Localities for SchiavinatoiteHide

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.

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.


Madagascar
Vakinankaratra Betafo District Andrembesoa Tetezantsio-Andoabatokely Pegmatite Field ⓘ Ampanodiana North pegmatite	Chukanov (2014)
ⓘ Ampanodiana South pegmatite	Pezzotta (2007)
Anosiarivo Manapa Antsentsindrano ⓘ Antsongombato gem mine (TL)	Demartin et al. (2001)

Schiavinatoite

About SchiavinatoiteHide

Unique IdentifiersHide

IMA Classification of SchiavinatoiteHide

Classification of SchiavinatoiteHide

Mineral SymbolsHide

Physical Properties of SchiavinatoiteHide

Optical Data of SchiavinatoiteHide

Chemistry of SchiavinatoiteHide

Crystallography of SchiavinatoiteHide

Crystal StructureHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of SchiavinatoiteHide

Synonyms of SchiavinatoiteHide

Other Language Names for SchiavinatoiteHide

Common AssociatesHide

Related Minerals - Strunz-mindat GroupingHide

Fluorescence of SchiavinatoiteHide

Other InformationHide

Internet Links for SchiavinatoiteHide

References for SchiavinatoiteHide

Localities for SchiavinatoiteHide

Locality ListHide

Related Minerals - Strunz-mindat Grouping Hide