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Microcline (Mikroklin)

Pictures (179 Images total)

Mikroklin XX
Views (File:
1167273088
): 10516, Rating: 9.33
Mikroklin XX
Größe: 13,5x10,0 cm; Fundort: Malosa-Massiv, Malawi
Copyright: Sandro Maggia; Contribution: Philip Blümner
Location: Malawi/Southern Region/Zomba, Distrikt/Mount Malosa
Mineral: Microcline
Image: 1167273088
Rating: 9.33 (votes: 6)
License: Usage for Mineralienatlas project only
Mikroklin XX

Größe: 13,5x10,0 cm; Fundort: Malosa-Massiv, Malawi

Copyright: Sandro Maggia
Contribution: Philip Blümner 2006-12-28
Locality: Mount Malosa / Zomba, Distrikt / Southern Region / Malawi
Mikroklin
Views (File:
1141569142
): 5171
Mikroklin
Mikroklin mit grünlichblauem Albit und Rauchquarzkristallen. Typische Pegmatitstufe (8x12 cm); Fundort: Papachacra, Belén, Anden, Argentinien
Copyright: Collector; Contribution: Collector
Collection: Collector
Location: Argentinien/Catamarca, Provinz/Belén, Departamento/Corral Quemado, Municipio/Papachacra
Mineral: Microcline
Image: 1141569142
Rating: 8.5 (votes: 2)
License: Usage for Mineralienatlas project only
Mikroklin

Mikroklin mit grünlichblauem Albit und Rauchquarzkristallen. Typische Pegmatitstufe (8x12 cm); Fundort: Papachacra, Belén, Anden, Argentinien
Collection: Collector
Copyright: Collector
Contribution: Collector 2006-03-05
Locality: Papachacra / Corral Quemado, Municipio / Belén, Departamento / Catamarca, Provinz / Argentinien
Mikroklin
Views (File:
1265801894
): 7364
Mikroklin
Größe: 13,3 x 8,3 x 6,0 cm; Fundort: Gilgit-Baltistan, Pakistan
Copyright: Rob Lavinsky; Contribution: Philip Blümner
Location: Pakistan/Gilgit-Baltistan (Nordgebiete; Northern Areas)
Mineral: Microcline
Image: 1265801894
Rating: 9 (votes: 1)
License: Usage for Mineralienatlas project only
Mikroklin

Größe: 13,3 x 8,3 x 6,0 cm; Fundort: Gilgit-Baltistan, Pakistan
Copyright: Rob Lavinsky
Contribution: Philip Blümner 2010-02-10
Locality: Gilgit-Baltistan (Nordgebiete; Northern Areas) / Pakistan
Mikroklin mit Quarz
Views (File:
1265802178
): 4913
Mikroklin mit Quarz
Größe: 10,5 x 10,0 x 7,5 cm; Fundort: Gilgit-Baltistan, Nordgebiete, Pakistan
Copyright: Joe Freilich; Contribution: Philip Blümner
Location: Pakistan/Gilgit-Baltistan (Nordgebiete; Northern Areas)
Mineral: Microcline
Image: 1265802178
Rating: 9 (votes: 1)
License: Usage for Mineralienatlas project only
Mikroklin mit Quarz

Größe: 10,5 x 10,0 x 7,5 cm; Fundort: Gilgit-Baltistan, Nordgebiete, Pakistan
Copyright: Joe Freilich
Contribution: Philip Blümner 2010-02-10
Locality: Gilgit-Baltistan (Nordgebiete; Northern Areas) / Pakistan
Feldspat (Mikroklin)
Views (File:
1362723581
): 2678
Feldspat (Mikroklin)
FO.: Mount Malosa, (Malosa Massiv), Zomba District, Malawi / Stufengröße: 7,7 x 5,3 cm
Copyright: Hrouda; Contribution: Hrouda
Collection: Hrouda
Location: Malawi/Southern Region/Zomba, Distrikt/Mount Malosa
Mineral: Microcline
Image: 1362723581
Rating: 9 (votes: 1)
License: Usage for Mineralienatlas project only
Feldspat (Mikroklin)

FO.: Mount Malosa, (Malosa Massiv), Zomba District, Malawi / Stufengröße: 7,7 x 5,3 cm
Collection: Hrouda
Copyright: Hrouda
Contribution: Hrouda 2013-03-08
Locality: Mount Malosa / Zomba, Distrikt / Southern Region / Malawi

You find additional specimen at the Geolitho Museum

Collectors Summary

Color bläulichgrün, grün, grau, weiß, graulich gelb, gelblich, rosarot und orangerot
Streak color weiß
Hardness (Mohs) 6.25
Solubility +++ HF, - HCl
Crystal System triklin, C1

Additional information / Summary

Siehe auch unser umfangreiches Feldspat Portrait

Chemism

Chemical formula

KAlSi3O8

Chemical composition

Aluminium, Silicium, Kalium, Sauerstoff

Unit weight: 278.3318782 u; Number of atoms in the formula: 13

Info

Empirical formula:

KAlSi3O8

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

45.99

8

61.54

15.9994300

127.9954400
Aluminium

Al

9.69

1

7.69

26.9815382

26.9815382
Silicon

Si

30.27

3

23.08

28.0855300

84.2565900
Potassium

K

14.05

1

7.69

39.0983100

39.0983100

Analysis wt%

SiO2 : 64.26, Al2O3 : 19.72, Na2O : 2.28, K2O : 13.42 (Ref: Rock Forming Minerals 63)

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.06-030

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

Classification by Hölzel

9.FC.300

9: SILICATES
F: Tektosilicates
C: Feldspar-Group

Dana 8th edition

76.01.01.05

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

IMA status

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Feldspar group  ⇒ Alkali feldspar

Optical Properties

Color

bläulichgrün, grün, grau, weiß, graulich gelb, gelblich, rosarot und orangerot

Streak color

weiß

Diaphaneity (Transparency)

durchscheinend bis transparent

max. Birefringence

0.006
Birefringence chart\! Microcline title=Birefringence chart Microcline

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

1.521

RI value β

1.524

RI value γ / ε

1.527

Ri mean

1.524

2V angle

Biaxial (-) 85~!

Optical Data Luminescence

Color LW-UV (365nm)

  

grün

LW-UV Intensity

schwach

Color SW-UV (254nm)

  

rot

SW-UV Intensity

mittel

Most Common Activator

Fe3+

Other Activators

Eu2+, Ce3+, Eu3+

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

triklin

Class (H-M)

1

Space Group number

2

Space Group

C1

Cell parameters a (Å)

8.58

Cell parameters b (Å)

12.97

Cell parameters c (Å)

7.22

Cell parameters a/b or c/a

0.662

Cell parameters c/b

0.557

Cell parameters α

90.65

Cell parameters β

115.93

Cell parameters γ

87.68

Z

4

Volume (ų)

721.965

X-Ray Powder Diffraction

4.213(50),
3.831(30),
3.704(30),
3.484(30),
3.466(30),
3.368(40),
3.286(50),
3.247(100)
XRD chart Microcline

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)

6.25

VHN (Hardness Vickers)

850 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.56

2.561 ( ρ calc. Mineralienatlas )

Instability

+++ HF, - HCl

(Co-)Type locality

(Co-)Type locality

Norwegen/Vestfold, Provinz/Larvik, Kommune/Stavern (Fredriksvärn)

Type material

Mineralogische Sammlung der TU Bergakademie Freiberg

Collection number of type material

29915 / S 5,1

Paragenesis of type material

Quarz, Albit

Preface

Occurrences

In Pegmatiten

Associations

Quarz (oft Rauchquarz), Fluorit, Siderit, Hämatit, Topas, Ägirin

Rareness

Weniger häufig als Orthoklas

Name from

dem griechischen mikron - klein und klinein - sich neigen

Author (Name, Year)

Breithaupt, 1830

Collector information

Die weltweit besten Mikrokline stammen aus Colorado (Pikes Peak Region) als matt-smaragdgrüne Amazonite mit Rauchquarz, von Papachacra (Argentinien), Mont Saint-Hilaire und Tory Hill (Canada) und von Amazonit-Neufunden aus Kenticha, Äthiopien

Additional Information

Feldspat-Gruppe ( Buddingtonit-Othoklas-Slawsonit-Serie). Oft als Bavenoer- und Manebacher Zwillinge)

References

Rock-forming Minerals (Deer, Howie & Zussmann), 2nd ed., 4A (2001)

Liu, S. - Rietveld structure refinement of microcline. European Journal of Mineralogy, 27 (2015), 501-510.

IMA group assignments

 
Feldspar group
 
 
 

 
 
Alkali feldspar
 
 
 

 
 
 
Anorthoclase ?
(Na,K)AlSi3O8
triklin
C1

 
 
 
Buddingtonite
(NH4)AlSi3O8·0.5 H2O
monoklin
P21, P21/m

 
 
 
Celsian
BaAl2Si2O8
monoklin
I2/c

 
 
 
Hyalophane
(K,Ba)Al(Si,Al)3O8
monoklin
C2/m

 
 
 
Microcline
KAlSi3O8
triklin
C1

 
 
 
Orthoclase
KAlSi3O8
monoklin
C2/m

 
 
 
Rubicline
(Rb,K)[AlSi3O8]
triklin
P1

 
 
 
Sanidine
(K,Na)(Si,Al)4O8
monoklin
C2/m

Refresh list

Actuality: 08. Jun 2025 - 21:09:19

Varieties

Amazonite

Other languages

Spanish

Microclina

French

Microcline

English

Microcline

Dutch

Microklien

Finnish

Mikrokliini

German

Mikroklin

Lithuanian

Mikroklinas

Russian

Микроклин

Ukrainian

Мікроклін

Hebrew

מיקרוקלין

Japanese

微斜長石

Simplified Chinese

微斜長石

Simplified Chinese

微斜长石

Alternative Name

German

Barbierit

Spanish

Barbierita

English

Barbierite

Ferruginous Microcline

Norwegian (Bokmål)

Kalinatronfeltspat

Italian

Microclino

Microline

Potash Feldsar

English

Potashfeldspar

Potassic Feldspar

Potassium Feldspar

English

Potassiumfeldspar

CNMNC symbol

Symbol

Mcc

Rock part of

 
Rocks

 
 
igneous rocks and sediments

 
 
 
crystalline igneous rocks

 
 
 
 
normal crystalline rocks

 
 
 
 
 
coarse-grained crystalline rocks

 
 
 
 
 
 
dioritic-rock

 
 
 
 
 
 
 
diorite

 
 
 
 
 
 
 
 
orbicular diorite  

 
 
 
 
 
 
granitic-rock

 
 
 
 
 
 
 
alkali-feldspar-granite

 
 
 
 
 
 
 
 
peralkaline alkali-feldspar-granite

 
 
 
 
 
 
 
 
 
ekerite  

 
 
 
 
 
 
syenitic-rock

 
 
 
 
 
 
 
alkali-feldspar-syenite

 
 
 
 
 
 
 
 
microclinite  

 
 
 
 
 
 
 
foid-bearing alkali-feldspar-syenite  

 
 
 
 
 
fine-grained crystalline rocks

 
 
 
 
 
 
phonolitic-rock

 
 
 
 
 
 
 
phonolite

 
 
 
 
 
 
 
 
nundorite  

Refresh list | View legend

Hint

- Essential mineral - Important for the classification of the rock.
- Accessory or non-essential mineral - this minerals are common, sometimes major part of, but are not always present.

Actuality: 08. Jun 2025 - 21:09:19

Locations with GPS information

IDs

GUSID (Global unique identifier short form) lJ_Lfclr20iYb0LMe8HOPg
GUID (Global unique identifier) 7DCB9F94-6BC9-48DB-986F-42CC7BC1CE3E
Database ID 2533