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Kampfite (Kampfit)

Collectors Summary

Color blaugrau
Streak color weiß
Lustre Glasglanz
Hardness (Mohs) 3
Cleavages vollkommen {001}
Fracture uneben
Crystal System monoklin, Cc

Chemism

Chemical formula

Ba12(Si11Al5)O31(CO3)8Cl5

Chemical composition

Aluminium, Barium, Chlor, Silicium, Kohlenstoff, Sauerstoff

Unit weight: 3245.101811 u; Number of atoms in the formula: 96

Info

Empirical formula:

Ba12(Si11Al5)O31(CO3)8Cl5

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Carbon

C

2.96

8

8.33

12.0107800

96.0862400

Oxygen

O

27.12

55

57.29

15.9994300

879.9686500

Aluminium

Al

4.16

5

5.21

26.9815382

134.9076910

Silicon

Si

9.52

11

11.46

28.0855300

308.9408300

Chlorine

Cl

5.46

5

5.21

35.4532000

177.2660000

Barium

Ba

50.78

12

12.50

137.3277000

1,647.9324000

Analysis wt%

SiO2 : 20.14, CO2 : 10.73, Al2O3 : 7.76, BaO : 57.72, Cl : 5.60 (Ref: Canadian Mineralogist 2007)

Strunz 9th edition incl. updates

9.EG.20

9: Silikate (Germanate)
E: Schichtsilikate (Phyllosilikate)
G: Doppelnetze mit sechsfach-Ringen
20:Kampfit-Gruppe

Lapis Classification

VIII/H.38-065

VIII: SILIKATE
H: Schichtsilikate
38: Schichtsilikate mit Tetraeder-Doppelschichten und verwandte Strukturen

Classification by Hölzel

9.ES.260

9: SILICATES
E: Phyllosilicates
S: Phyllosilicates with tetrahedral Doublelayers

Dana 8th edition

78.05.10.01

78: Unclassified Silicate Minerals
05: Unclassified silicates possible phyllosilicates

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

blaugrau

Streak color

weiß

Lustre

Glasglanz

max. Birefringence

0.048

Birefringence chart\! Kampfite title=Birefringence chart Kampfite

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

1.642

RI value γ / ε

1.594

Ri mean

1.626

2V angle

Biaxial

Dispersion

gering; r < v

Crystallography

Crystal System

monoklin

Class (H-M)

m

Space Group number

9

Space Group

Cc

Cell parameters a (Å)

31.233

Cell parameters b (Å)

5.2398

Cell parameters c (Å)

9.097

Cell parameters a/b or c/a

5.961

Cell parameters c/b

1.736

Cell parameters α

90°

Cell parameters β

106.93

Cell parameters γ

90°

Z

1

Volumne (ų)

1424.245

X-Ray Powder Diffraction

14.67(100),
3.883(100),
3.357(50),
2.988(60),
2.887(50),
2.616(70),
2.495(40),
1.969(50)

XRD chart Kampfite

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)

3

VHN (Hardness Vickers)

83 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.800 (berechnet)

3.783 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen {001}

Fracture

uneben

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

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

Type material

M.Y. Williams Museum, University of British Columbia, Vancouver, Kanada

Mineral Collection, Geological Survey of Canada, Ottawa, Kanada

Preface

Name from

Zu ehren von Mineraloge Robert Anthony Kampf (geb. 1948), Kurator und Leiter der Sektion Minerale, Los Angeles County Museum of Natural History, California, USA

Author (Name, Year)

Basciano & Groat & Roberts & Grice & Dunning & Foord & Kjarsgaard & Wa

References

Canadian Mineralogist 39 (2001), 1053

The Canadian Mineralogist 45 (2007), 935-943

Other languages

German

Kampfit

Spanish

Kampfita

French

Kampfite

English

Kampfite

Russian

Кампфит

Traditional Chinese

氯碳矽鋇石

Simplified Chinese

氯碳硅钡石

CNMNC (IMA)-Number

IMA 2000-003

CNMNC symbol

Symbol

Kpf

Locations with GPS information