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Rubicline

Collectors Summary

Color farblos
Streak color weiß
Lustre Glasglanz
Hardness (Mohs) 6
Cleavages vollkommen {001}, gut {010} (bei Analogie zu Mikroklin)
Crystal System triklin, P1
Morphology Körnig

Chemism

Chemical formula

(Rb,K)[AlSi3O8]

Chemical composition

Aluminium, Rubidium, Silicium, Kalium, Sauerstoff

Unit weight: 313.1090182 u; Number of atoms in the formula: 13

Info

Empirical formula:

(Rb0.75K0.25)[AlSi3O8]

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

40.88

8

61.54

15.9994300

127.9954400
Aluminium

Al

8.62

1

7.69

26.9815382

26.9815382
Silicon

Si

26.91

3

23.08

28.0855300

84.2565900
Potassium

K

3.12

0.25

1.92

39.0983100

9.7745775
Rubidium

Rb

20.47

0.75

5.77

85.4678300

64.1008725

Analysis wt%

SiO2 : 58.68, Al2O3 : 16.48, Cs2O : 0.92, Rb2O : 17.47, K2O : 6.23 (Ref: American Mineralogist 98)

Strunz 9th edition incl. updates

9.FA.30

9: Silikate (Germanate)
F: Gerüstsilikate (Tektosilikate) ohne zeolithisches H2O
A: Gerüstsilikate (Tektosilicates) ohne weitere [Anionen]
30:Feldspat: Alkali

Lapis Classification

VIII/J.06-035

VIII: SILIKATE
J: Gerüstsilikate (mit Zeolithen)
6: Ohne tetraederfremde Anionen; Feldspat-Gruppe

Classification by Hölzel

9.FC.310

9: SILICATES
F: Tektosilicates
C: Feldspar-Group

Dana 8th edition

76.01.01.07

76: Tektosilicates Tectosilicate Al-Si Framework
01: Tektosilicates Tectosilicate Al-Si Framework with Al-Si frameworks
01: K (Na,Ba) feldspars

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Feldspar group  ⇒ Alkali feldspar

Optical Properties

Color

farblos

Streak color

weiß

Diaphaneity (Transparency)

transparent

Lustre

Glasglanz

2V angle

Biaxial

Crystallography

Crystal System

triklin

Class (H-M)

1

Space Group number

2

Space Group

P1

Cell parameters a (Å)

8.81

Cell parameters b (Å)

13.01

Cell parameters c (Å)

7.18

Cell parameters a/b or c/a

0.677

Cell parameters c/b

0.552

Cell parameters α

90.30

Cell parameters β

115.70

Cell parameters γ

88.20

Z

4

Volume (ų)

741.15

X-Ray Powder Diffraction

5.82(0),
5.77(0),
4.62(0),
3.88(0),
3.61(0),
3.60(0),
3.59(0),
2.94(0)
XRD chart Rubicline

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

Morphology

Körnig

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

6

Density (g/cm³)

2.75 (berechnet)

2.806 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen {001}, gut {010} (bei Analogie zu Mikroklin)

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

Italien/Toskana (Toscana)/Livorno, Provinz/Elba, Insel/Campo nell'Elba/San Piero in Campo/Gang della Speranza (Filone della Speranza)

Preface

Occurrences

In Pegmatiten

Associations

Mikroklin, Pollucit, Lepidolith, Muskovit, Quarz, Apatit

Rareness

Extrem selten

Author (Name, Year)

Teertstra & Cerny & Hawthorne & Pier & Wang & Ewing, 1998

References

American Mineralogist 83 (1998), 1335

IMA group assignments

Other languages

Spanish

Rubiclina

French

Rubicline

English

Rubicline

German

Rubiklin

Russian

Рубиклин

CNMNC (IMA)-Number

IMA 1996-058

CNMNC symbol

Symbol

Rub

Locations with GPS information

IDs

GUSID (Global unique identifier short form) jU9zxCxCdUCUeecYUsvw2w
GUID (Global unique identifier) C4734F8D-422C-4075-9479-E71852CBF0DB
Database ID 3333