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Fencooperite (Fencooperit)

Pictures (1 Images total)

Fencooperit von Gillespit
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Fencooperit von Gillespit
schwarzer Fencooperit mit rötlichem Gillespit in weißem Sanbornit, Trumbull Peak, Mariposa Co., Kalifornien, USA; BB ~ 1 mm
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: USA/Kalifornien (California)/Mariposa County/Incline/Trumbull Peak
Mineral: Fencooperite
Image: 1579805647
License: Usage for Mineralienatlas project only
Fencooperit von Gillespit

schwarzer Fencooperit mit rötlichem Gillespit in weißem Sanbornit, Trumbull Peak, Mariposa Co., Kalifornien, USA; BB 1 mm
Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-01-23
Locality: Trumbull Peak / Incline / Mariposa County / Kalifornien (California) / USA

Collectors Summary

Color pechschwarz, graubraun
Streak color grauschwarz
Lustre Glasglanz bis Diamantglanz
Hardness (Mohs) 4.50 - 5.00
Cleavages keine
Fracture uneben bis halbmuschelig
Crystal System trigonal, P3m1

Chemism

Chemical formula

Ba6Fe33+[Cl3|O|(CO3)2|Si8O22]·H2O

Chemical composition

Barium, Chlor, Eisen, Silicium, Kohlenstoff, Sauerstoff, Wasserstoff

Unit weight: 1828.565994 u; Number of atoms in the formula: 54

Info

Empirical formula:

Ba6Fe3[Cl3O(CO3)2Si8O22]·H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.11

2

3.70

1.0079470

2.0158940
Carbon

C

1.31

2

3.70

12.0107800

24.0215600
Oxygen

O

26.25

30

55.56

15.9994300

479.9829000
Silicon

Si

12.29

8

14.81

28.0855300

224.6842400
Chlorine

Cl

5.82

3

5.56

35.4532000

106.3596000
Iron

Fe

9.16

3

5.56

55.8452000

167.5356000
Barium

Ba

45.06

6

11.11

137.3277000

823.9662000

Analysis wt%

SiO2 : 27.38, Al2O3 : 1.35, Fe2O3 : 12.77, BaO : 50.51, CO2 : 4.81, Cl : 3.23, H2O : 0.98 (Ref: Canadian Mineralogist 2001)

Strunz 9th edition incl. updates

9.BH.20

9: Silikate (Germanate)
B: Gruppensilikate (Sorosilikate)
H: Gruppen(Soro)-Silikate mit Si3O10 oder größeren Anionen; Kationen in tetrahedraler [4] und größerer Koordination
20:Fencooperit-Gruppe

Lapis Classification

VIII/C.37-010

VIII: SILIKATE
C: Gruppensilikate

Classification by Hölzel

9.BH.380

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

Dana 8th edition

64.01.02.01

64: Cyclosilicates Cyclosilicates
01: Cyclosilicates Cyclosilicates Cyclosilicate Rings with Other Anions and Insular Silicate Groups with mixed ring types

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

pechschwarz, graubraun

Streak color

grauschwarz

Change in color

an dünnen Kanten schmutzig graubraun

Diaphaneity (Transparency)

durchscheinend bis undurchsichtig

Lustre

Glasglanz bis Diamantglanz

max. Birefringence

0.012
Birefringence chart\! Fencooperite title=Birefringence chart Fencooperite

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

1.723

RI value γ / ε

1.711

Ri mean

1.719

2V angle

Uniaxial (-)

Pleochroism

blauschwarz nach hell-grünlichgrau

Optical Data Luminescence

Luminescence

keine Fluoreszenz bekannt

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

156

Space Group

P3m1

Cell parameters a (Å)

10.741

Cell parameters b (Å)

-

Cell parameters c (Å)

7.096

Cell parameters a/b or c/a

0.661

Cell parameters c/b

-

Z

1

Volume (ų)

708.979

X-Ray Powder Diffraction

3.892(100),
3.148(40),
2.820(90),
2.685(80),
2.329(30),
2.208(40),
2.136(40),
1.705(30)
XRD chart Fencooperite

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)

4.50 - 5.00

VHN (Hardness Vickers)

321 (10g)

Density (g/cm³)

4.21 (berechnet)

4.283 ( ρ calc. Mineralienatlas )

Cleavages

keine

Fracture

uneben bis halbmuschelig

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

USA/Kalifornien (California)/Mariposa County/Incline/Trumbull Peak

Preface

Associations

Alforsit, Baryt, Celsian, Gillespit, Quarz, Pyrrhotin, Sanbornit

Name from

dem amerikanischen Sammler Joseph Fenimore Cooper (geb. 1937)

Author (Name, Year)

Roberts & Grice & Dunning & Venance, 2001

References

Canadian Mineralogist 39 (2001), 1059

Other languages

German

Fencooperit

Spanish

Fencooperita

English

Fencooperite

French

Fencooperite

Russian

Фенкуперит

Traditional Chinese

氯碳矽鐵鋇石

Simplified Chinese

氯碳硅铁钡石

CNMNC (IMA)-Number

IMA 2000-023

CNMNC symbol

Symbol

Fco

Locations with GPS information

IDs

GUSID (Global unique identifier short form) USQiEWrduka-pJag0sCR0Q
GUID (Global unique identifier) 11222451-DD6A-46BA-BEA4-96A0D2C091D1
Database ID 1114