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Traskite (Traskit)

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Traskit
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Traskit
roter Traskit, Bildbreite: 4 mm, Fundort: Esquire No. 1 claim, Rush Creek, Fresno Co., Kalifornien, USA
Copyright: Luigi Chiappino; Contribution: thdun5
Location: USA/Kalifornien (California)/Fresno Co./Rush Creek/Esquire No. 1 Claim
Mineral: Traskite
Image: 1288202908
Rating: 4 (votes: 1)
License: Usage for Mineralienatlas project only
Traskit

roter Traskit, Bildbreite: 4 mm, Fundort: Esquire No. 1 claim, Rush Creek, Fresno Co., Kalifornien, USA
Copyright: Luigi Chiappino
Contribution: thdun5 2010-10-27
Locality: Esquire No. 1 Claim / Rush Creek / Fresno Co. / Kalifornien (California) / USA

Collectors Summary

Color bräunlichrot
Streak color blass rötlichbraun
Lustre Glasglanz
Hardness (Mohs) 5
Fracture muschelig
Solubility - verdünnte Säuren oder Alkalien
Crystal System hexagonal, P6m2

Chemism

Chemical formula

Ba21Ca(Fe2+,Mn,Ti)4(Ti,Fe,Mg)12(Si12O36)(Si2O7)6(O,OH)30Cl6·14H2O

Chemical composition

Barium, Calcium, Chlor, Eisen, Magnesium, Mangan, Silicium, Titan, Sauerstoff, Wasserstoff

Unit weight: 6592.39749038 u; Number of atoms in the formula: 225.5

Info

Empirical formula:

Ba21Ca(Fe0.6Mn0.3Ti0.1)4(Ti0.6Fe0.3Mg0.1)12(Si12O36)(Si2O7)6(O0.75(OH)0.25)30Cl6·14H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.54

35.5

15.74

1.0079470

35.7821185
Oxygen

O

29.61

122

54.10

15.9994300

1,951.9304600
Magnesium

Mg

0.44

1.2

0.53

24.3050600

29.1660720
Silicon

Si

10.22

24

10.64

28.0855300

674.0527200
Chlorine

Cl

3.23

6

2.66

35.4532000

212.7192000
Calcium

Ca

0.61

1

0.44

40.0784000

40.0784000
Titanium

Ti

5.52

7.6

3.37

47.8671000

363.7899600
Manganese

Mn

1.00

1.2

0.53

54.9380499

65.9256599
Iron

Fe

5.08

6

2.66

55.8452000

335.0712000
Barium

Ba

43.75

21

9.31

137.3277000

2,883.8817000

Analysis wt%

SiO2 : 27.77, TiO2 : 5.60, FeO : 4.20, MnO : 1.36, CaO : 0.86, BaO : 51.19, H2O : 5.10, Cl : 3.50, F : 0.40 (Ref: American Mineralogist 65)

Strunz 9th edition incl. updates

9.CP.05

9: Silikate (Germanate)
C: Ringsilikate (Cyclosilikate)
P: Zwölfer- und größere Ringe
05:Traskit-Gruppe

Lapis Classification

VIII/E.26-010

VIII: SILIKATE
E: Ringsilikate
26: Zwölferringe und größere Ringstrukturen

Classification by Hölzel

9.CD.660

9: SILICATES
C: Cyclosilicates
D: ~[Si6O18]-rings, without borate
6: With other anions

Dana 8th edition

64.05.01.01

64: Cyclosilicates Cyclosilicates
05: Cyclosilicates Cyclosilicates 12-membered rings with [Si2O7] dimers

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

bräunlichrot

Streak color

blass rötlichbraun

Diaphaneity (Transparency)

transparent, durchscheinend

Lustre

Glasglanz

max. Birefringence

0.012
Birefringence chart\! Traskite title=Birefringence chart Traskite

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

1.714

RI value γ / ε

1.702

Ri mean

1.710

2V angle

Uniaxial (-)

Pleochroism

O = bräunlichrot, E=farblos zu Strohgelb

Crystallography

Crystal System

hexagonal

Class (H-M)

6m2

Space Group number

187

Space Group

P6m2

Cell parameters a (Å)

17.89

Cell parameters b (Å)

-

Cell parameters c (Å)

12.33

Cell parameters a/b or c/a

0.689

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

1

Volumne (ų)

3417.546

X-Ray Powder Diffraction

15.4(50),
3.51(40),
3.27(20),
3.21(20),
3.08(30),
2.96(100),
2.90(20),
2.53(20)
XRD chart Traskite

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)

3.71 (gemessen)

3.203 ( ρ calc. Mineralienatlas )

Fracture

muschelig

Instability

- verdünnte Säuren oder Alkalien

(Co-)Type locality

(Co-)Type locality

USA/Kalifornien (California)/Fresno Co./Rush Creek/Esquire No. 1 Claim

Type material

California Division of Mines & Geology, San Francisco, California, USA

Preface

Name from

Dr. John Boardman Trask (1824 {1879), der erste California State Geologe (1850 - 1857).

Author (Name, Year)

Alfors & Stinson & Mathews & Pabst, 1965

References

American Mineralogist 50 (1965), 314

Doklady Akademii Nauk SSSR 229 (1976), 1101

Other languages

German

Traskit

Spanish

Traskita

French

Traskite

English

Traskite

Russian

Траскит

Traditional Chinese

矽鈦鐵鋇石

Simplified Chinese

硅钛铁钡石

CNMNC (IMA)-Number

IMA 1964-014

CNMNC symbol

Symbol

Tsk

Locations with GPS information