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Bafertisite (Bafertisit)

Pictures (5 Images total)

orangerote Bafertisit-Plättchen mit Aegirin
Views (File:
1240127313
): 2350
orangerote Bafertisit-Plättchen mit Aegirin
in Dolomit; Bildbreite: 4 mm; Fundort: Bayan-Obo-Lagerstätte, Vereinigtes Darhan-Mumingan-Banner, Baotou, Innere Mongolei, China
Copyright: Pavel M. Kartashov; Contribution: slugslayer
Location: China/Innere Mongolei (Neimenggu)/Baotou/Vereinigtes Darhan-Mumingan-Banner/Bayan Obo/Bayan Obo SE-Fe-Nb-Lagerstätte
Mineral: Bafertisite
Image: 1240127313
Rating: 7 (votes: 2)
License: Usage for Mineralienatlas project only
orangerote Bafertisit-Plättchen mit Aegirin

in Dolomit; Bildbreite: 4 mm; Fundort: Bayan-Obo-Lagerstätte, Vereinigtes Darhan-Mumingan-Banner, Baotou, Innere Mongolei, China

Copyright: Pavel M. Kartashov
Contribution: slugslayer 2009-04-19
Locality: Bayan Obo SE-Fe-Nb-Lagerstätte / Bayan Obo / Vereinigtes Darhan-Mumingan-Banner / Baotou / Innere Mongolei (Neimenggu) / China
Bafertisit-Spaltkristall in Fenit
Views (File:
1240128094
): 6048
Bafertisit-Spaltkristall in Fenit
Größe: 12 mm; Fundort: Verkhnee-Espe-Massiv, Tarbagatai-Gebirge, Ostkasachstan, Kasachstan
Copyright: Pavel M. Kartashov; Contribution: slugslayer
Location: Kasachstan/Schyghys Qasaqstan oblysy (Ostkasachstan)/Tarbagatai-Gebirge/Verkhnee-Espe-Massiv
Mineral: Bafertisite
Image: 1240128094
Rating: 7 (votes: 1)
License: Usage for Mineralienatlas project only
Bafertisit-Spaltkristall in Fenit

Größe: 12 mm; Fundort: Verkhnee-Espe-Massiv, Tarbagatai-Gebirge, Ostkasachstan, Kasachstan

Copyright: Pavel M. Kartashov
Contribution: slugslayer 2009-04-19
Locality: Verkhnee-Espe-Massiv / Tarbagatai-Gebirge / Schyghys Qasaqstan oblysy (Ostkasachstan) / Kasachstan
Bafertisit (rot)
Views (File:
1240127134
): 1384
Bafertisit (rot)
Größe: 10x08x03 mm; Fundort: Bayan-Obo-Lagerstätte, Vereinigtes Darhan-Mumingan-Banner, Baotou, Innere Mongolei, China
Copyright: Pavel M. Kartashov; Contribution: slugslayer
Location: China/Innere Mongolei (Neimenggu)/Baotou/Vereinigtes Darhan-Mumingan-Banner/Bayan Obo/Bayan Obo SE-Fe-Nb-Lagerstätte
Mineral: Bafertisite
Image: 1240127134
License: Usage for Mineralienatlas project only
Bafertisit (rot)

Größe: 10x08x03 mm; Fundort: Bayan-Obo-Lagerstätte, Vereinigtes Darhan-Mumingan-Banner, Baotou, Innere Mongolei, China

Copyright: Pavel M. Kartashov
Contribution: slugslayer 2009-04-19
Locality: Bayan Obo SE-Fe-Nb-Lagerstätte / Bayan Obo / Vereinigtes Darhan-Mumingan-Banner / Baotou / Innere Mongolei (Neimenggu) / China
roter Bafertisit
Views (File:
1240128286
): 1091
roter Bafertisit
mit schwarzem Aegirin und gelbgrünem Sphalerit; Bildbreite: 12 mm; Fundort: Dara-i-Pioz-Gletscher, Alayskiy (Alai) Range, Tien-Shan-Gebirge, Tadschikistan
Copyright: Pavel M. Kartashov; Contribution: slugslayer
Location: Tadschikistan/Republik-unterstellte Gebiete (Nohijahoi tobei Dschumhurij)/Dara-i-Pioz (Darai-Pioz)
Mineral: Bafertisite
Image: 1240128286
License: Usage for Mineralienatlas project only
roter Bafertisit

mit schwarzem Aegirin und gelbgrünem Sphalerit; Bildbreite: 12 mm; Fundort: Dara-i-Pioz-Gletscher, Alayskiy (Alai) Range, Tien-Shan-Gebirge, Tadschikistan

Copyright: Pavel M. Kartashov
Contribution: slugslayer 2009-04-19
Locality: Dara-i-Pioz (Darai-Pioz) / Republik-unterstellte Gebiete (Nohijahoi tobei Dschumhurij) / Tadschikistan
Bafertisit
Views (File:
1704222166
): 24
Bafertisit
Gelbe nadelige Bafertisit-xx (mit schwarzem Aegirin?) in Quarz (ohne Maßstab), FO: Fountain Quarry, Fountain, Pitt Co., North Carolina, USA (vgl. https://www.mindat.org/photo-153439.html)
Copyright: Wikipedia-user: David Hospital; Contribution: oliverOliver
Location: USA/North Carolina/Pitt Co./Fountain/Fountain Quarry
Mineral: Bafertisite
Image: 1704222166
License: Creative Commons - Attribution-ShareAlike 4.0 International  (CC BY-SA) V.4.0
Bafertisit

Gelbe nadelige Bafertisit-xx (mit schwarzem Aegirin?) in Quarz (ohne Maßstab), FO: Fountain Quarry, Fountain, Pitt Co., North Carolina, USA (vgl. https://www.mindat.org/photo-153439.html)

Copyright: Wikipedia-user: David Hospital
Contribution: oliverOliver 2024-01-02
Locality: Fountain Quarry / Fountain / Pitt Co. / North Carolina / USA

Collectors Summary

Color weiß, gelblich weiß, grau, hellbraun
Streak color weiß
Hardness (Mohs) 5
Crystal System triklin, C1

Chemism

Chemical formula

Ba2Fe2+4Ti2(Si2O7)2O2(OH)2F2

Chemical composition

Barium, Eisen, Silicium, Titan, Fluor, Sauerstoff, Wasserstoff

Unit weight: 977.9439005 u; Number of atoms in the formula: 32

Info

Empirical formula:

Ba2Fe4Ti2(Si2O7)2O2(OH)2F2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.21

2

6.25

1.0079470

2.0158940

Oxygen

O

29.45

18

56.25

15.9994300

287.9897400

Fluorine

F

3.89

2

6.25

18.9984033

37.9968065

Silicon

Si

5.74

2

6.25

28.0855300

56.1710600

Titanium

Ti

9.79

2

6.25

47.8671000

95.7342000

Iron

Fe

22.84

4

12.50

55.8452000

223.3808000

Barium

Ba

28.08

2

6.25

137.3277000

274.6554000

Analysis wt%

SiO2 : 25.18, TiO2 : 14.27, Al2O3 : 1.00, Fe2O3 : 3.67, FeO : 10.82, MnO : 12.77, BaO : 26.59, H2O : 2.16, F : 3.50 (Ref: Tr.Min.71)

Strunz 9th edition incl. updates

9.BE.55

9: Silikate (Germanate)
B: Gruppensilikate (Sorosilikate)
E: Si2O7 Gruppen mit zusätzlichen Anionen; Kationen in oktahedraler [6] und größerer Koordination
55:Bafertisit-Gruppe

Lapis Classification

VIII/C.15-020

VIII: SILIKATE
C: Gruppensilikate
15: Gruppensilikate [Si2O7] 6-, mit tetraederfremden Anionen (O,OH,F); Bafertisit-Reihe

Classification by Hölzel

9.BH.200

9: SILICATES
B: Sorosilicates
H: Rosenbuschite-Lamprophyllite-Group

Dana 8th edition

56.02.06b.01

56: Sorosilicates Sorosilicate Si2O7 Groups and O, OH, F. and H2O
02: Sorosilicates Sorosilicate Si2O7 Groups and O, OH, F. and H2O with cations in [4] and/or >[4] coordination
06b: Seidozerite - Lamprophyllite group (Bafertisite subgroup)

IMA status

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Seidozerite supergroup  ⇒ Bafertisite group

Optical Properties

Color

weiß, gelblich weiß, grau, hellbraun

Streak color

weiß

Diaphaneity (Transparency)

durchscheinend

max. Birefringence

0.055

Birefringence chart\! Bafertisite title=Birefringence chart Bafertisite

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

1.805 - 1.808

RI value β

1.835

RI value γ / ε

1.860 - 1.862

Ri mean

1.843

2V angle

Biaxial (-) 54° - 86° (gemessen) 84.8° (berechnet)

Orientation

Y = b, X ^ a = 5

Absorption

X > Z

Pleochroism

gelblich, gelblichrot, rötlichbraun

Crystallography

Crystal System

triklin

Class (H-M)

1

Space Group number

1

Space Group

C1

Cell parameters a (Å)

10.665(2)

Cell parameters b (Å)

13.743(2)

Cell parameters c (Å)

11.721(3)

Cell parameters a/b or c/a

0.776

Cell parameters c/b

0.853

Cell parameters α

90.30(4)°

Cell parameters β

112.27(2)°

Cell parameters γ

90.00(3)°

Z

4

Volume (ų)

1589.767

X-Ray Powder Diffraction

2.65(100),
2.52(30),
2.23(30),
2.11(40),
2.07(30),
1.75(30),
1.72(40),
1.57(30)

XRD chart Bafertisite

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)

5

VHN (Hardness Vickers)

390 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.1 (gemessen) 4.35 (berechnet)

4.086 ( ρ calc. Mineralienatlas )

Preface

Name from

der chemischen Zusammensetzung (Ba-Fe-Ti-Si)

Author (Name, Year)

Peng, 1959

References

Canadian Mineralogist 44 (2006), 1273

IMA 15-I: Bafertisite Proposal 15-I is accepted, and the chemical formula of bafertisite is revised as follows: Ba2Fe2+ 4 Ti2(Si2O7)2O2(OH)2F2, with Z=4. Fe2+ is the dominant cation of the O sheet, OH and F are ordered at the XO A and XP M sites and must be presented as two groups of anions in the mineral formula: (OH)2 and F2. The structural data for bafertisite (holotype material) are: triclinic; space group C1; a=10.665(2), b=13.743(2), c=11.721(3) Å, α=90.30(4), ß=112.27(2), γ=90.00(3)°, V= 1589.8(8) Å3. - CNMNC Newsletter No. 28, December 2015, page 1864; Mineralogical Magazine, 79, 1859–1864.

IMA group assignments

Other languages

German

Bafertisit

Spanish

Bafertisita

English

Bafertisite

French

Bafertisite

Russian

Бафертисит

Traditional Chinese

矽鋇鐵鈦石

Simplified Chinese

硅钡铁钛石

CNMNC symbol

Symbol

Bft

Locations with GPS information

IDs

GUSID (Global unique identifier short form) pDA_tX0Qokmo9QlMUidldA
GUID (Global unique identifier) B53F30A4-107D-49A2-A8F5-094C52276574
Database ID 263