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Tapiolite-(Fe)

Pictures (5 Images total)

Tapiolit-Fe xx "Kniezwillinge"
Views (File:
1566140754
): 587
Tapiolit-Fe xx "Kniezwillinge"
Rio Graia,Trontano,Val Vigezzo/Italien; Fund von C.Albertini; Bildbreite 10,5 mm
Copyright: Haubi; Contribution: Haubi
Collection: Haubi
Location: Italien/Piemont (Piemonte), Region/Verbano-Cusio-Ossola, Provinz/Trontano/Rio Graia
Mineral: Tapiolite-(Fe)
Image: 1566140754
Rating: 10 (votes: 2)
License: Usage for Mineralienatlas project only
Tapiolit-Fe xx "Kniezwillinge"

Rio Graia,Trontano,Val Vigezzo/Italien; Fund von C.Albertini; Bildbreite 10,5 mm
Collection: Haubi
Copyright: Haubi
Contribution: Haubi 2019-08-18
Locality: Rio Graia / Trontano / Verbano-Cusio-Ossola, Provinz / Piemont (Piemonte), Region / Italien
Tapiolith-(Fe)
Views (File:
1153231984
): 1492
Tapiolith-(Fe)
Mina Quixaba, Frei Martinho, Paraíba, Brasilien;
Größe des Kristalls: 10x8mm
Copyright: Fabre Minerals; Contribution: Philip Blümner
Location: Brasilien/Nordosten (Região Nordeste)/Paraíba/Frei Martinho/Quixaba/Quixaba-Pegmatit
Mineral: Tapiolite-(Fe)
Image: 1153231984
Rating: 7.5 (votes: 2)
License: Usage for Mineralienatlas project only
Tapiolith-(Fe)

Mina Quixaba, Frei Martinho, Paraíba, Brasilien;
Größe des Kristalls: 10x8mm
Copyright: Fabre Minerals
Contribution: Philip Blümner 2006-07-18
Locality: Quixaba-Pegmatit / Quixaba / Frei Martinho / Paraíba / Nordosten (Região Nordeste) / Brasilien
Ferrotapiolit
Views (File:
1266138679
): 1463
Ferrotapiolit
Kristallgröße: 15 mm; Fundort: Joaquim, Quixaba, Frei Martinho, Paraiba, Nordosten, Brasilien
Copyright: Philip Blümner; Contribution: Philip Blümner
Collection: giantcrystal
Location: Brasilien/Nordosten (Região Nordeste)/Paraíba/Frei Martinho/Quixaba/Joaquim Cigano
Mineral: Tapiolite-(Fe)
Image: 1266138679
Rating: 8 (votes: 2)
License: Usage for Mineralienatlas project only
Ferrotapiolit

Kristallgröße: 15 mm; Fundort: Joaquim, Quixaba, Frei Martinho, Paraiba, Nordosten, Brasilien
Collection: giantcrystal
Copyright: Philip Blümner
Contribution: Philip Blümner 2010-02-14
Locality: Joaquim Cigano / Quixaba / Frei Martinho / Paraíba / Nordosten (Região Nordeste) / Brasilien
Ferrotapiolit
Views (File:
1264177218
): 1137
Ferrotapiolit
Größe: 45x30 mm; Fundort: Alto-do-Giz-Pegmatit, Equador, Nordostregion, Brasilien
Copyright: Paul Bongaerts; Contribution: Philip Blümner
Location: Brasilien/Nordosten (Região Nordeste)/Rio Grande do Norte/Borborema, Bergbaudistrikt/Equador/Alto-do-Giz-Pegmatit
Mineral: Tapiolite-(Fe)
Image: 1264177218
Rating: 5 (votes: 2)
License: Usage for Mineralienatlas project only
Ferrotapiolit

Größe: 45x30 mm; Fundort: Alto-do-Giz-Pegmatit, Equador, Nordostregion, Brasilien
Copyright: Paul Bongaerts
Contribution: Philip Blümner 2010-01-22
Locality: Alto-do-Giz-Pegmatit / Equador / Borborema, Bergbaudistrikt / Rio Grande do Norte / Nordosten (Região Nordeste) / Brasilien
Ferrotapiolit
Views (File:
1264177265
): 1058
Ferrotapiolit
Kristallgröße: 8 mm; Fundort: Quixaba-Pegmatit, Frei Martinho, Paraíba, Nordostregion, Brasilien
Copyright: Paul Bongaerts; Contribution: Philip Blümner
Location: Brasilien/Nordosten (Região Nordeste)/Paraíba/Frei Martinho/Quixaba/Quixaba-Pegmatit
Mineral: Tapiolite-(Fe)
Image: 1264177265
Rating: 5 (votes: 2)
License: Usage for Mineralienatlas project only
Ferrotapiolit

Kristallgröße: 8 mm; Fundort: Quixaba-Pegmatit, Frei Martinho, Paraíba, Nordostregion, Brasilien
Copyright: Paul Bongaerts
Contribution: Philip Blümner 2010-01-22
Locality: Quixaba-Pegmatit / Quixaba / Frei Martinho / Paraíba / Nordosten (Região Nordeste) / Brasilien

Collectors Summary

Color bräunlichschwarz, schwarz
Streak color braun
Hardness (Mohs) 6.25
Solubility - Säuren
Crystal System tetragonal, P42/mnm

Chemism

Chemical formula

(Fe2+,Mn2+)(Ta,Nb)2O6

Chemical composition

Eisen, Mangan, Niob, Tantal, Sauerstoff

Unit weight: 469.490048475 u; Number of atoms in the formula: 9

Info

Empirical formula:

(Fe0.75Mn0.25)(Ta0.75Nb0.25)2O6

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

20.45

6

66.67

15.9994300

95.9965800
Manganese

Mn

2.93

0.25

2.78

54.9380499

13.7345125
Iron

Fe

8.92

0.75

8.33

55.8452000

41.8839000
Niobium

Nb

9.89

0.5

5.56

92.9063820

46.4531910
Tantalum

Ta

57.81

1.5

16.67

180.9479100

271.4218650

Analysis wt%

FeO : 11.03, MnO : 2.72, SnO2 : 0.71, Ta2O5 : 80.77, Nb2O5 : 2.78 (Ref: Canadian Mineralogist 92)

Strunz 9th edition incl. updates

4.DB.10

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
D: Metall: Sauerstoff = 1:2 und vergleichbare
B: Mit mittelgroßen [Kationen]: Ketten kantenverknüpfter Oktaeder
10:Tapiolit-Gruppe

Lapis Classification

IV/D.04-010

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

Classification by Hölzel

4.DD.440

4: OXIDES
D: Dioxides
D: Rutile-Group
4: Trirutiles

Dana 8th edition

08.03.01.01

08: Multiple Oxides with Nb, Ta, and Ti
03: Multiple Oxides with Nb, Ta, and Ti where A (B2O6)
01: Tapiolite Series

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

bräunlichschwarz, schwarz

Streak color

braun

Diaphaneity (Transparency)

opak

max. Birefringence

0.15
Birefringence chart\! Tapiolite-(Fe) title=Birefringence chart Tapiolite-(Fe)

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

2.27

RI value β
  • (Li)

RI value γ / ε

2.42

Ri mean

2.320

2V angle

Uniaxial (+)

Optical Data Luminescence

Luminescence

keine Fluoreszenz bekannt

Crystallography

Crystal System

tetragonal

Class (H-M)

4/mmm

Space Group number

136

Space Group

P42/mnm

Cell parameters a (Å)

4.75

Cell parameters b (Å)

-

Cell parameters c (Å)

9.24

Cell parameters a/b or c/a

1.945

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

2

Volume (ų)

208.478

X-Ray Powder Diffraction

3.37(100),
2.58(90),
2.375(50),
1.747(90),
1.677(50),
1.501(50),
1.407(50),
1.395(50)
XRD chart Tapiolite-(Fe)

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)

6.25

VHN (Hardness Vickers)

926 (100g)

Density (g/cm³)

7.82

7.479 ( ρ calc. Mineralienatlas )

Instability

- Säuren

(Co-)Type locality

(Co-)Type locality

Finnland/Kanta-Häme, Landschaft/Tammela/Sukula Pegmatite/Kulmala/Tapiolit-(Fe) Typ-Lokalität

Preface

Author (Name, Year)

Lahti & Johanson & Virkkunen, 1983

References

Geological Society of Finland, Bulletin 55 (1983), 101

Other languages

Spanish

Ferrotapiolita

French

Ferrotapiolite

German

Tapiolit-(Fe)

English

Tapiolite-(Fe)

Russian

Тапиолит-(Fe)

Russian

Ферротапиолит

Simplified Chinese

重钽铁矿

Japanese

鉄ﾀﾋﾟｵ石

old name

German

Ferrotapiolit

Alternative Name

English

Ferrotapiolite

CNMNC symbol

Symbol

Tap-Fe

Locations with GPS information

IDs

GUSID (Global unique identifier short form) W_iQeMgXbEOcVPDUpnJldQ
GUID (Global unique identifier) 7890F85B-17C8-436C-9C54-F0D4A6726575
Database ID 1204