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Oligoclase

Pictures (28 Images total)

Oligoklas
Views (Image: 1548515784): 468
Oligoklas

Oligoklas; Drangedal,Norwegen; BB: 9 cm

Collection: Rockhounder
Copyright: Rockhounder
Contribution: Rockhounder 2019-01-26
Locality: Drangedal / Vestfold og Telemark, Provinz / Norwegen
Oligoklas "Sonnenstein"
Views (Image: 1554304742): 1331
Oligoklas "Sonnenstein" (SNr: SyS-Olig-5-1-5)

Dieser aus Karur in Indien stammende Oligoklas-Feldspat wird durch den Einschluss dünner rötlicher, das Licht schön reflektierender Hämatit-Blättchen zum "Sonnenstein". Weitere Farben treten durch ...

Collection: Klaus Schäfer
Copyright: Klaus Schäfer
Contribution: Klaus Schäfer 2019-04-03
Locality: Karur, Distrikt / Tamil Nadu / Indien
Oligoklas "Sonnenstein"
Views (Image: 1554305496): 4319
Oligoklas "Sonnenstein" (SNr: SyS-Olig-5-1-5)  D

Dieser aus Gairo in Tanzania stammende, etwa 25 mm große Oligoklas-Feldspat wird durch den Einschluss dünner rötlicher, das Licht schön reflektierender Hämatit-Blättchen zum "Sonnenstein". Weitere ...

Collection: Klaus Schäfer
Copyright: Klaus Schäfer
Contribution: Klaus Schäfer 2019-04-03
Locality: Gairo / Morogoro / Uluguru-Gebirge / Morogoro, Region / Tansania
Oligoklas XX
Views (Image: 1208198586): 6367
Oligoklas XX

Größe: 4.5 x 3.4 x 3 cm; Fundort: Chihuahua, Mexiko

Copyright: Rob Lavinsky
Contribution: slugslayer 2008-04-14
Locality: Chihuahua / Mexiko
Oligoklas
Views (Image: 1325828812): 991
Oligoklas

Größe: 57x57 mm; Fundort: Horse Hill, Norway, Oxford Co., Maine, USA

Collection: British Museum of Natural History
Copyright: Rock Currier
Contribution: slugslayer 2012-01-06
Locality: Horse Hill / Norway / Oxford Co. / Maine / USA
Oligoklas "Sonnenstein"
Views (Image: 1554304060): 2823
Oligoklas "Sonnenstein" (SNr: SyS-Olig-5-1-5)

Dieser aus Karur in Indien stammende, etwa 30 mm große Oligoklas-Feldspat wird durch den Einschluss dünner rötlicher, das Licht schön reflektierender Hämatit-Blättchen zum "Sonnenstein". Im Durchli...

Collection: Klaus Schäfer
Copyright: Klaus Schäfer
Contribution: Klaus Schäfer 2019-04-03
Locality: Karur, Distrikt / Tamil Nadu / Indien

Collectors Summary

Color braun, farblos, grünlich, grau, gelblich
Streak color weiß
Hardness (Mohs) 6.25
Solubility +++ HF
Crystal System triklin, C1

Chemism

Chem­ical formula

(Na,Ca)(Si,Al)4O8

Addi­tional chem. informa­tion

Plagioklas Feldspat mit Albit:Anorthit Molmasse-Verhältis von 90:10 bis 70:30

Chem­ical com­po­si­tion

Aluminium, Calcium, Natrium, Silicium, Sauerstoff

Unit weight: 266.49549585 u; Number of atoms in the formula: 13

Info

Empirical formula:

(Na0.75Ca0.25)(Si0.75Al0.25)4O8

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

48.03

8

61.54

15.9994300

127.9954400

Sodium

Na

6.47

0.75

5.77

22.9897702

17.2423277

Aluminium

Al

10.12

1

7.69

26.9815382

26.9815382

Silicon

Si

31.62

3

23.08

28.0855300

84.2565900

Calcium

Ca

3.76

0.25

1.92

40.0784000

10.0196000

Anal­y­sis wt%

SiO2 : 63.35, Al2O3 : 22.89, CaO : 4.09, Na2O : 8.90, K2O : 0.65 (Ref: Rock Forming Minerals 63)

Strunz 9th edi­tion incl. updates

9.FA.35

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

Lapis Clas­sifica­tion

VIII/J.07-030

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

Clas­sifica­tion by Hölzel

9.FD.110

9: SILICATES
F: Tektosilicates
D: Plagioclase-Group

Dana 8th edi­tion

76.01.03.02

76: Tektosilicates Tectosilicate Al-Si Framework
01: Tektosilicates Tectosilicate Al-Si Framework with Al-Si frameworks
03: Plagioclase series

IMA sta­tus

Zwischenglied zweier anerkannter Mineralien

Min­eral sta­tus

Gemenge/Gemisch/Mischkristall

Var­i­ety / poly­type of

Albite

IMA Classification

IMA Clas­sifica­tion

Feldspar group  ⇒ Plagioclase

Optical Properties

Color

braun, farblos, grünlich, grau, gelblich

Streak color

weiß

Diaphane­ity (Trans­parency)

transparent bis durchscheinend

max. Birefrin­gence

0.007

Birefringence chart\! Oligoclase title=Birefringence chart Oligoclase

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

1.539

RI value β

1.543

RI value γ / ε

1.546

Ri mean

1.543

2V angle

Biaxial (-) 82°

Optical Data Luminescence

Lumi­nes­cence

fluoreszierend

Color LW-UV (365nm)

 

gelb

Color SW-UV (254nm)

 

rot

SW-UV Intensity

schwach

Most Common Acti­vator

Fe3+

Other Acti­vators

Pb2+, Mn2+

After­glow (Per­sistant Lumi­nes­cence)

keine Daten

Ther­mo­lu­mi­nes­cence

vorhanden

Crystallography

Crystal Sys­tem

triklin

Class (H-M)

1

Space Group number

2

Space Group

C1

Cell param­e­ters a (Å)

8.169

Cell param­e­ters b (Å)

12.851

Cell param­e­ters c (Å)

7.124

Cell param­e­ters a/b or c/a

0.636

Cell param­e­ters c/b

0.554

Cell param­e­ters α

93.63

Cell param­e­ters β

116.40

Cell param­e­ters γ

89.47

Z

4

Volumne (ų)

668.388

X-Ray Pow­der Diffrac­tion

4.026(80),
3.761(70),
3.685(50),
3.658(50),
3.182(100),
2.981(50),
2.933(70),
2.843(50)

XRD chart Oligoclase

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)

2.64 - 2.66 / Durchschnittlich = 2.65

2.648 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ HF

(Co-)Type locality

(Co-)Type locality

Schweden/Stockholm, Provinz/Danvikstull

Preface

Author (Name, Year)

Breithaupt, 1826

Addi­tional Informa­tion

Ausführliche Informationen unter: Feldspat ( Gruppe )

References

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

IMA group assignments


 
 
 
 
 

 
 
 
NaAlSi3O8
triklin
C1

 
 
 
(Na,Ca)(Si,Al)4O8
triklin
P1

 
 
 
CaAl2Si2O8
triklin
P1

 
 
 
(Ca,Na)(Si,Al)4O8
triklin
I1

 
 
 
(Ca,Na)(Si,Al)4O8
triklin
C1

 
 
 
(Na,Ca)(Si,Al)4O8
triklin
C1

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Actuality: 23. Jun 2022 - 17:55:27

Other languages

French

Oligoclase

English

Oligoclase

German

Oligoklas

Russian

Олигоклаз

Simplified Chinese

奥长石

Alternative Name

Adventurine Oligoclase

German

Amansit

Spanish

Amansita

Amansite

Amantice

German

Amantit

Spanish

Amantita

Amantite

German

Amausit

Spanish

Amausita

Amausite

Lluvia

German

Luotolit

Oligoalbite

Spanish

Oligoclasita

Oligoclasite

German

Oligoklasit

Soda-Spodumene (of Dana)

Sodium Spodumene

Tschermakite (of Kobell)

Simplified Chinese

更长石

Rock part of

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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: 23. Jun 2022 - 17:55:28

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Oligoklas
Google-Bilder-Suche - search for: Oligoklas
Mineralienatlas.de (Forum) - search for: Oligoklas

English pages

Mindat - search for: Oligoclase
Webmineral - search for:Oligoclase
Handbook-of-Mineralogy - search for: Oligoclase
RRUFF - Raman, XRD and other mineral data - search for: Oligoclase
RRUFF - References and PDF downloads - search for: Oligoclase
American-Mineralogist-Crystal-Structure-Database - search for: Oligoclase
Strahlen.org - search for: Oligoclase

Russian pages

Webmineral.ru - search for: Олигоклаз

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Oligoklas
Crystal-Treasure.com - search for: Oligoklas
Bosse - search for: Oligoklas
Edelsteine Neuburg - Gundolf Fischer - search for: Oligoklas

Locations with GPS information