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Potassiccarpholite

Additional Functions

Collectors Summary

Color weiß, stohgelb
Streak color weiß
Lustre Seidenglanz
Hardness (Mohs) 5
Cleavages vollkommen parallel zu [100]
Crystal System orthorhombisch, Ccca

Chemism

Chemical formula

K(Mn2+,Li)2Al4Si4O12(OH,F)8

Chemical composition

Aluminium, Lithium, Mangan, Silicium, Fluor, Kalium, Sauerstoff, Wasserstoff

Unit weight: 677.27848615 u; Number of atoms in the formula: 37

Info

Empirical formula:

K(Mn0.75Li0.25)2Al4Si4O12((OH)0.75F0.25)8

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.89

6

16.22

1.0079470

6.0476820
Lithium

Li

0.51

0.5

1.35

6.9412000

3.4706000
Oxygen

O

42.52

18

48.65

15.9994300

287.9897400
Fluorine

F

5.61

2

5.41

18.9984033

37.9968065
Aluminium

Al

15.94

4

10.81

26.9815382

107.9261528
Silicon

Si

16.59

4

10.81

28.0855300

112.3421200
Potassium

K

5.77

1

2.70

39.0983100

39.0983100
Manganese

Mn

12.17

1.5

4.05

54.9380499

82.4070749

Analysis wt%

SiO2 : 36.73,
Al2O3 : 29.38,
FeO : 1.44,
MnO : 13.37,
Li2O : 1.34,
Na2O : 0.51,
K2O : 4.07,
F : 7.47,
H2O : 7.24
(Ref: Canadian Mineralogist 2004)

Strunz 9th edition incl. updates

9.DB.05

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
B: Ketten- und Bandsilikate mit 2 periodischen Ketten SiO6; mit zusätzlich O, OH, H2O Pyroxen-verwandte Mineralien
05:Karpholith-Gruppe

Lapis Classification

VIII/F.03-035

VIII: SILIKATE
F: Ketten- und Bandsilikate
3: Zweierketten [Si2O6] 4-

Classification by Hölzel

9.DE.236

9: SILICATES
D: Inosilicates; ~[Si2O6]4--...2-Chain
E: Orthorhombic Pyroxenes and Pyroxenoides
2: Carpholite-Group

Dana 8th edition

65.01.05.05

65: Inosilicate Minerals
01: Inosilicates Inosilicate Single-Width Unbranched Chains, W=1 with chains P=2
05: Carpholite group

IMA status

anerkannt 2002

Mineral status

anerkanntes Mineral

Optical Properties

Color

weiß, stohgelb

Streak color

weiß

Diaphaneity (Transparency)

durchscheinend

Lustre

Seidenglanz

max. Birefringence

0.020
Birefringence chart\! Potassiccarpholite title=Birefringence chart Potassiccarpholite

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

1.578

RI value β

1.592

RI value γ / ε

1.598

Ri mean

1.578 1.

2V angle

Biaxial (-) 57°

Orientation

X = b, Y = a, Z = c

Absorption

X > Y = Z

Pleochroism

Schwach; farblos zu gelb

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

68

Space Group

Ccca

Cell parameters a (Å)

13.715

Cell parameters b (Å)

20.302

Cell parameters c (Å)

5.138

Cell parameters a/b or c/a

0.676

Cell parameters c/b

0.253

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volume (ų)

1430.635

X-Ray Powder Diffraction

5.705(100), 3.819(80), 3.433(80), 3.048(90), 2.744(80), 2.613(100)
XRD chart Potassiccarpholite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Physical Properties

Hardness (Mohs)

5

Density (g/cm³)

3.08 (gemessen) 3.06 (berechnet)

3.144 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen parallel zu [100]

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

USA/Idaho/Boise Co./Sawtooth Batholith

Preface

Author (Name, Year)

Tait & Hawthorne & Grice & Jambor & Pinch, 2004

References

Canadian Mineralogist 42 (2004), 121

Other languages

German

Kaliumkarpholith

Spanish

Potasiocarfolita

English

Potassiccarpholite

Traditional Chinese

富鉀纖錳柱石

Simplified Chinese

富钾纤锰柱石

Alternative Name

German

Kalikarpholith

German

Kalium-Karpholith

Spanish

Potasio-carfolita

English

Potassic-carpholite

French

Potassic-carpholite

German

Potassiccarpholit

CNMNC (IMA)-Number

IMA 2002-064

CNMNC symbol

Symbol

Pcar

IDs

GUSID (Global unique identifier short form) e2kh-tRYMECO6ZLmERNNZw
GUID (Global unique identifier) FA21697B-58D4-4030-8EE9-92E611134D67
Database ID 1852