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Senaite (Senait)

Pictures (41 Images total)

Senait
Views (File:
1415718505
): 1936
Senait
Bildbreite: 1,8 mm; Fundort: Wannigletscher, Binntal, Wallis, Schweiz
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Schweiz/Wallis, Kanton/Goms, Bezirk/Binntal/Binn/Kriegalptal (Chriegalptal)/Wannigletscher-Scherbadung
Mineral: Senaite
Image: 1415718505
Rating: 9 (votes: 2)
License: Usage for Mineralienatlas project only
Senait

Bildbreite: 1,8 mm; Fundort: Wannigletscher, Binntal, Wallis, Schweiz

Copyright: Stephan Wolfsried
Contribution: Hg 2014-11-11
Locality: Wannigletscher-Scherbadung / Kriegalptal (Chriegalptal) / Binn / Binntal / Goms, Bezirk / Wallis, Kanton / Schweiz
Senait mit Cafarsit
Views (File:
1423215037
): 1173
Senait mit Cafarsit
Bildbreite: 3 mm; Fundort: Wannigletscher, Binntal, Wallis, Schweiz
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Schweiz/Wallis, Kanton/Goms, Bezirk/Binntal/Binn/Kriegalptal (Chriegalptal)/Wannigletscher-Scherbadung
Mineral: Senaite
Image: 1423215037
Rating: 9 (votes: 2)
License: Usage for Mineralienatlas project only
Senait mit Cafarsit

Bildbreite: 3 mm; Fundort: Wannigletscher, Binntal, Wallis, Schweiz

Copyright: Stephan Wolfsried
Contribution: Hg 2015-02-06
Locality: Wannigletscher-Scherbadung / Kriegalptal (Chriegalptal) / Binn / Binntal / Goms, Bezirk / Wallis, Kanton / Schweiz
Senait und Rutil
Views (File:
1483872303
): 922
Senait und Rutil
Rhomboedrischer Senait zusammen mit Rutil als dreidimensionalem Sagenit aus dem Chriegalptunnel, Binntal, Wallis, Schweiz. Bildbreite etwa 9 mm.
Copyright: Klaus Schäfer; Contribution: Klaus Schäfer
Collection: Klaus Schäfer, Collection number: Binn-CbTu-Sena-3-1-1
Location: Schweiz/Wallis, Kanton/Goms, Bezirk/Binntal/Binn/Kriegalptal (Chriegalptal)/Kriegalp-Wasserstollen
Mineral: Rutile, Senaite
Image: 1483872303
Rating: 9 (votes: 2)
License: Usage for Mineralienatlas project only
Senait und Rutil (SNr: Binn-CbTu-Sena-3-1-1)

Rhomboedrischer Senait zusammen mit Rutil als dreidimensionalem Sagenit aus dem Chriegalptunnel, Binntal, Wallis, Schweiz. Bildbreite etwa 9 mm.

Collection: Klaus Schäfer
Copyright: Klaus Schäfer
Contribution: Klaus Schäfer 2017-01-08
Locality: Kriegalp-Wasserstollen / Kriegalptal (Chriegalptal) / Binn / Binntal / Goms, Bezirk / Wallis, Kanton / Schweiz
Senait
Views (File:
1640253224
): 214
Senait
Etwa 4 mm großer Senaitkristall vom Wannigletscher im Binntal in der Schweiz.
Copyright: Klaus Schäfer; Contribution: Klaus Schäfer
Collection: Klaus Schäfer, Collection number: Binn-WG-Senait-5-1-4
Location: Schweiz/Wallis, Kanton/Goms, Bezirk/Binntal/Binn/Kriegalptal (Chriegalptal)/Wannigletscher-Scherbadung
Mineral: Senaite
Image: 1640253224
Rating: 8.5 (votes: 2)
License: Usage for Mineralienatlas project only
Senait (SNr: Binn-WG-Senait-5-1-4)

Etwa 4 mm großer Senaitkristall vom Wannigletscher im Binntal in der Schweiz.

Collection: Klaus Schäfer
Copyright: Klaus Schäfer
Contribution: Klaus Schäfer 2021-12-23
Locality: Wannigletscher-Scherbadung / Kriegalptal (Chriegalptal) / Binn / Binntal / Goms, Bezirk / Wallis, Kanton / Schweiz
Senait
Views (File:
1415718532
): 1588
Senait
Bildbreite: 1,8 mm; Fundort: Wannigletscher, Binntal, Wallis, Schweiz
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Schweiz/Wallis, Kanton/Goms, Bezirk/Binntal/Binn/Kriegalptal (Chriegalptal)/Wannigletscher-Scherbadung
Mineral: Senaite
Image: 1415718532
Rating: 9 (votes: 1)
License: Usage for Mineralienatlas project only
Senait

Bildbreite: 1,8 mm; Fundort: Wannigletscher, Binntal, Wallis, Schweiz

Copyright: Stephan Wolfsried
Contribution: Hg 2014-11-11
Locality: Wannigletscher-Scherbadung / Kriegalptal (Chriegalptal) / Binn / Binntal / Goms, Bezirk / Wallis, Kanton / Schweiz

You find additional specimen at the Geolitho Museum

Collectors Summary

Color schwarz, grau
Streak color bräunlichschwarz
Lustre Halbmetallglanz
Hardness (Mohs) 6
Fracture muschelig
Solubility +++ HF, heiße H2SO4
Crystal System trigonal, R3

Chemism

Chemical formula

Pb(Mn,Y,U)(Fe,Zn)2(Ti,Fe,Cr,V)18(O,OH)38

Empirical formula (analysis)

(Pb0.76Sr0.20La0.08Ce0.07Ba0.04)(Ti12.89Fe3+5.99Mn0.88Y0.59Zn0.12Mg0.07Nb0.03Cr0.02Th0.02)O38

Chemical composition

Blei, Chrom, Eisen, Mangan, Titan, Yttrium, Zink, Sauerstoff, Uran, Vanadium, Wasserstoff

Unit weight: 1879.733779252 u; Number of atoms in the formula: 59.76

Info

Empirical formula:

(Pb0.76Sr0.20La0.08Ce0.07Ba0.04)(Ti12.89Fe5.99Mn0.88Y0.59Zn0.12Mg0.07Nb0.03Cr0.02Th0.02)O38

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

32.34

38

63.59

15.9994300

607.9783400

Magnesium

Mg

0.09

0.07

0.12

24.3050600

1.7013542

Titanium

Ti

32.82

12.89

21.57

47.8671000

617.0069190

Chromium

Cr

0.06

0.02

0.03

51.9961600

1.0399232

Manganese

Mn

2.57

0.88

1.47

54.9380499

48.3454839

Iron

Fe

17.80

5.99

10.02

55.8452000

334.5127480

Zinc

Zn

0.42

0.12

0.20

65.4094000

7.8491280

Strontium

Sr

0.93

0.2

0.33

87.6210000

17.5242000

Yttrium

Y

2.79

0.59

0.99

88.9058520

52.4544527

Niobium

Nb

0.15

0.03

0.05

92.9063820

2.7871915

Barium

Ba

0.29

0.04

0.07

137.3277000

5.4931080

Lanthanum

La

0.59

0.08

0.13

138.9055200

11.1124416

Cerium

Ce

0.52

0.07

0.12

140.1161000

9.8081270

Lead

Pb

8.38

0.76

1.27

207.2100000

157.4796000

Thorium

Th

0.25

0.02

0.03

232.0381100

4.6407622

Analysis wt%

TiO2 : 58.68, Fe2O3 : 16.20, FeO : 8.53, MnO : 4.08, PbO : 9.21, V2O5 : 0.70, Y2O3 : 0.86, Ln2O3 : 1.00 (Ref: American Mineralogist 76)

Strunz 9th edition incl. updates

4.CC.40

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
C: Metall: Sauerstoff = 2: 3,3: 5, und vergleichbare
C: Mit großen und mittelgroßen Kationen
40:Crichtonit-Gruppe

Lapis Classification

IV/C.09-060

IV: OXIDE
C: Oxide mit Verhältnis Metall : Sauerstoff = 2:3 (M2O3 und verwandte Verbindungen)
9: Crichtonit-Gruppe

Classification by Hölzel

4.CE.400

4: OXIDES
C: R2O3 Sesquioxides
E: Other complex Oxides, mostly hextrig
4: Senaite-Group

Dana 8th edition

08.05.01.04

08: Multiple Oxides with Nb, Ta, and Ti
05: Multiple Oxides with Nb, Ta, and Ti
01: Crichtonite group (ABC18 T2 O38)

IMA status

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

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Crichtonite Group

Optical Properties

Color

schwarz, grau

Streak color

bräunlichschwarz

Change in color

grau in reflektiertem Licht

Diaphaneity (Transparency)

opak

Lustre

Halbmetallglanz

max. Birefringence

wenig bis moderat

RI value α / ω / n

2.50

Ri mean

2.500

2V angle

Uniaxial (-)

Reflectivity: (Lambda nm) ↓, ↑, Ø

(470) 20.1, 21.1, 20.6
(546) 18.7, 19.7, 19.2
(589) 18.2, 19.2, 18.7
(650) 17.8, 18.8, 18.3

Reflection chart Senaite

Reflectivity Ø

19.2

Crystallography

Crystal System

trigonal

Class (H-M)

3

Space Group number

148

Space Group

R3

Cell parameters a (Å)

10.439

Cell parameters b (Å)

-

Cell parameters c (Å)

21.091

Cell parameters a/b or c/a

2.02

Cell parameters c/b

-

Z

3

Volume (ų)

1990.424

X-Ray Powder Diffraction

3.428(50),
3.081(40),
2.914(100),
2.869(60),
2.772(60),
2.490(60),
2.155(90),
1.817(80)

XRD chart Senaite

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

VHN (Hardness Vickers)

1119 (100g)

Density (g/cm³)

4.59 (berechnet) 5.204 - 5.301 (gemessen)

4.704 ( ρ calc. Mineralienatlas )

Fracture

muschelig

Tenacity

spröde

Instability

+++ HF, heiße H2SO4

(Co-)Type locality

(Co-)Type locality

Brasilien/Südosten (Região Sudeste)/Minas Gerais/Ouro Preto

Type material

Natural History Museum, London, England

NationalMuseum of Natural History, Washington, D.C., USA

Collection number of type material

83656, 86037 (England) R7241 (USA)

Preface

Occurrences

In Granit- oder Syenit-Pegmatiten hydrothermaler Lagerstätten; Ein Abraum Mineral

Associations

Ilmenit, Rutil, Magnetit, Hämatit

Name from

Joachim Candido de Costa Sena (1852–1919), Professor der Mineralogie, Bergbauschule, Ouro Preto, Brasilien

Author (Name, Year)

Hussak & Prior, 1898

References

Minerals and Museums 5 (2004)

Mineralogical Magazine 12 (1898), 30

European Journal of Mineralogy 2 (1990), 163

IMA group assignments


 
 
PbZn2(Mn,Y)(Ti,Fe3+)18O36(OH,O)2
trigonal
R3

 
 
KNa3Cu2(C2O4)4
triklin
P1

 
 
SrFe2+(Ti4+12Cr3+6)Mg2[O36(OH)2]
trigonal
R3

 
 
(Pb,Sr)(U4+,U6+)(Fe2+,Zn)2(Ti,Fe2+,Fe3+)18(O,OH)38
trigonal
R3

 
 
(Sr,Pb)(Mn,Fe)Fe3+2(Ti,Fe3+)18O38
trigonal
R3

 
 
(Ce,La,U,Y)2Fe3+2(Ti,Fe3+)18O38
trigonal
R3

 
 
La(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
trigonal
R3

 
 
(Sr,Pb)(Y,U)Fe3+2(Ti,Fe3+)18O38
trigonal
R3

 
 
(Pb,Sr)(Y,Mn)(Fe3+)2(Ti,Fe3+)18O38
trigonal
R3

 
 
(Na,Pb)(Mn2+,Y)(Zn,Fe)2(Ti,Fe3+,Nb)18(O,OH,F)O38
trigonal
R3

 
 
(BaSr)Zr(Fe3+,Mg)2(Ti,Cr,Fe3+)18O38
trigonal
R3

 
 
(Ca,Ce)(Zr,Mg)(Ti,Fe3+)2(Ti,Cr,Fe3+)18O38
trigonal
R3

 
 
(Sr,Pb)(U,Y)Fe2(Ti,Fe3+,Cr3+)18O38
trigonal
R3

 
 
K(Zr,Ca)(Fe3+,Mg)2(Ti,Cr,Fe3+)18O38
trigonal
R3

 
 
(☐,Pb,Ce,Na)(U4+,Mn,U6+)Fe3+2(Ti,Fe3+)18O38
trigonal
R3

 
 
SrZr4+(Ti4+12Cr3+6)Mg2O38
trigonal
R3

 
 
PbMn2+(Mn2+,Fe2+)2(V5+,Ti,Fe3+,☐)18O38
triklin
R3

 
 
(Fe2+,U,Pb)2(Ti,Fe3+)O4
 
 

 
 
SrCaFe2+2(Cr4Ti2)Ti12O38
trigonal
R3

 
 
Pb(Mn,Y,U)(Fe,Zn)2(Ti,Fe,Cr,V)18(O,OH)38
trigonal
R3

 
 
NaFe2+Zn2(Ti,Fe3+,Nb)6Ti12O38
trigonal
R3

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Actuality: 10. Feb 2025 - 20:30:17

Other languages

German

Senait

English

Senaite

French

Senaite

Spanish

Senaíta

Russian

Сенаит

Traditional Chinese

鉛錳鈦鐵礦

Simplified Chinese

铅锰钛铁矿

Japanese

セナアイト

CNMNC symbol

Symbol

Sna

Locations with GPS information

IDs

GUSID (Global unique identifier short form) 1iIRlO2KMU6PJ5s0HGSslQ
GUID (Global unique identifier) 941122D6-8AED-4E31-8F27-9B341C64AC95
Database ID 3477