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Afghanite (Afghanit)

Pictures (38 Images total)

Afghanit
Views (File:
1316160740
): 2853
Afghanit
Größe: 0,89 mm; Fundort: Valentano, Viterbo, Provinz, Latium (Lazio), Region, Italien
Copyright: Matteo Chinellato; Contribution: Hg
Collection: Domenico Preite
Location: Italien/Latium (Lazio), Region/Viterbo, Provinz/Valentano
Mineral: Afghanite
Image: 1316160740
Rating: 8.67 (votes: 3)
License: Usage for Mineralienatlas project only
Afghanit

Größe: 0,89 mm; Fundort: Valentano, Viterbo, Provinz, Latium (Lazio), Region, Italien

Collection: Domenico Preite
Copyright: Matteo Chinellato
Contribution: Hg 2011-09-16
Locality: Valentano / Viterbo, Provinz / Latium (Lazio), Region / Italien
Afghanit
Views (File:
1287044860
): 10217
Afghanit
Größe: 2,84 mm; Fundort: Case Collina (Toscopomici Steinbruch), Pitigliano, Grosseto, Italien
Copyright: Matteo Chinellato; Contribution: Hg
Collection: Domenico Preite
Location: Italien/Toskana (Toscana)/Grosseto, Provinz/Pitigliano/Case Collina (Toscopomici Steinbruch)
Mineral: Afghanite
Image: 1287044860
Rating: 9 (votes: 2)
License: Usage for Mineralienatlas project only
Afghanit

Größe: 2,84 mm; Fundort: Case Collina (Toscopomici Steinbruch), Pitigliano, Grosseto, Italien

Collection: Domenico Preite
Copyright: Matteo Chinellato
Contribution: Hg 2010-10-14
Locality: Case Collina (Toscopomici Steinbruch) / Pitigliano / Grosseto, Provinz / Toskana (Toscana) / Italien
Afghanit
Views (File:
1304853091
): 3381
Afghanit
Größe: 2,2 mm; Fundort: Montenero, Onano, Viterbo, Latium, Italien
Copyright: Matteo Chinellato; Contribution: Hg
Location: Italien/Latium (Lazio), Region/Viterbo, Provinz/Onano/Montenero (Pozzolana) Steinbruch
Mineral: Afghanite
Image: 1304853091
Rating: 8.5 (votes: 2)
License: Usage for Mineralienatlas project only
Afghanit

Größe: 2,2 mm; Fundort: Montenero, Onano, Viterbo, Latium, Italien

Copyright: Matteo Chinellato
Contribution: Hg 2011-05-08
Locality: Montenero (Pozzolana) Steinbruch / Onano / Viterbo, Provinz / Latium (Lazio), Region / Italien
Afghanite
Views (File:
1541565520
): 1623
Afghanite
Afghanite specimen, from Ladjuar Medam, Sar-e Sang, Koksha Valley, Khash & Kuran Wa Munjan Districts, Badakhshan Province, Afghanistan; Size 92 x 78 x 49 mm
Copyright: pegmatite; Contribution: pegmatite
Location: Afghanistan/Badachshan (Badakhshan; Badahsan), Provinz/Kuran va Munjan, Bezirk/Kokscha-Tal/Sar-e-Sang/Ladjuar Medam (Lajur Madan)
Mineral: Afghanite
Image: 1541565520
Rating: 9 (votes: 1)
License: Usage for Mineralienatlas project only
Afghanite

Afghanite specimen, from Ladjuar Medam, Sar-e Sang, Koksha Valley, Khash & Kuran Wa Munjan Districts, Badakhshan Province, Afghanistan; Size 92 x 78 x 49 mm

Copyright: pegmatite
Contribution: pegmatite 2018-11-07
Locality: Ladjuar Medam (Lajur Madan) / Sar-e-Sang / Kokscha-Tal / Kuran va Munjan, Bezirk / Badachshan (Badakhshan; Badahsan), Provinz / Afghanistan
Afghanite
Views (File:
1710088822
): 66
Afghanite
Afghanite crystal in matrix rock, from Ladjuar Medam, Sar-e-Sang, Kuran wa Munjan District, Badakhshan, Afghanistan; Dimensions: 64 mm x 51 mm x 36 mm
Copyright: pegmatite; Contribution: pegmatite
Location: Afghanistan/Badachshan (Badakhshan; Badahsan), Provinz/Kuran va Munjan, Bezirk/Kokscha-Tal/Sar-e-Sang/Ladjuar Medam (Lajur Madan)
Mineral: Afghanite
Image: 1710088822
Rating: 9 (votes: 1)
License: Usage for Mineralienatlas project only
Afghanite

Afghanite crystal in matrix rock, from Ladjuar Medam, Sar-e-Sang, Kuran wa Munjan District, Badakhshan, Afghanistan; Dimensions: 64 mm x 51 mm x 36 mm

Copyright: pegmatite
Contribution: pegmatite 2024-03-10
Locality: Ladjuar Medam (Lajur Madan) / Sar-e-Sang / Kokscha-Tal / Kuran va Munjan, Bezirk / Badachshan (Badakhshan; Badahsan), Provinz / Afghanistan

You find additional specimen at the Geolitho Museum

Collectors Summary

Color tintenblau / hellblau
Streak color weiß
Lustre Glasglanz
Hardness (Mohs) 5.5 - 6
Solubility +++ Säuren
Crystal System trigonal, P31c
Morphology säulig-spindelförmige sowie z.T. undeutliche Kristalle; prismatisch-bipyramidal; Kristallgrößen bis über 2 cm bekannt!; Körner; derb

Chemism

Chemical formula

(Na15K5Ca11)(Si24Al24O96)(SO4)6Cl6

Chemical composition

Aluminium, Calcium, Chlor, Natrium, Silicium, Kalium, Sauerstoff, Schwefel

Unit weight: 4627.8539398 u; Number of atoms in the formula: 211

Info

Empirical formula:

(Na15K5Ca11)(Si24Al24O96)(SO4)6Cl6

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

41.49

120

56.87

15.9994300

1,919.9316000

Sodium

Na

7.45

15

7.11

22.9897702

344.8465530

Aluminium

Al

13.99

24

11.37

26.9815382

647.5569168

Silicon

Si

14.57

24

11.37

28.0855300

674.0527200

Sulfur

S

4.16

6

2.84

32.0655000

192.3930000

Chlorine

Cl

4.60

6

2.84

35.4532000

212.7192000

Potassium

K

4.22

5

2.37

39.0983100

195.4915500

Calcium

Ca

9.53

11

5.21

40.0784000

440.8624000

Analysis wt%

SiO2 : 30.80, Al2O3 : 25.00, CaO : 16.50, Na2O : 12.60, K2O : 2.70, SO3 : 8.50, CO2 : 0.40, Cl : 4.60, H2O : 0.70 (Ref: Bulletin de Mineralogie 68)

Strunz 9th edition incl. updates

9.FB.05

9: Silikate (Germanate)
F: Gerüstsilikate (Tektosilikate) ohne zeolithisches H2O
B: Gerüstsilikate (Tektosilicates) mit weiteren [Anionen]
05:Cancrinit-Gruppe

Lapis Classification

VIII/J.09-050

VIII: SILIKATE
J: Gerüstsilikate (mit Zeolithen)
9: Mit tetraederfremden Anionen; Cancrinit-Gruppe

Classification by Hölzel

9.FE.630

9: SILICATES
F: Tektosilicates
E: Hexagonal or trigonal with other Anions
6: Afghanite-Group - trigonal, axis a~~12A and c=n*~~5A, n=1-5

Hey's Chemical Index of Minerals

17.10.12

17: Silicates Containing other Anions
10: Silicates with sulphate, molybdate or tungstate

Dana 8th edition

76.02.05.01

76: Tektosilicates Tectosilicate Al-Si Framework
02: Tektosilicates Tectosilicate Al-Si Framework Feldspathoids and related species
05: Cancrinite group

IMA status

anerkannt 1968

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Feldspathoid

Optical Properties

Color

tintenblau / hellblau

Streak color

weiß

Diaphaneity (Transparency)

durchscheinend

Lustre

Glasglanz

max. Birefringence

0.006

Birefringence chart\! Afghanite title=Birefringence chart Afghanite

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

1.523

RI value γ / ε

1.529

Ri mean

1.525

2V angle

Uniaxial (+)

Optical Data Luminescence

Color LW-UV (365nm)

 

gelb

LW-UV Intensity

stark

LW-UV Observation Frequency

selten

Color SW-UV (254nm)

 

orange

SW-UV Intensity

mittel

SW-UV Observation Frequency

selten

LW-UV Other Colors

   

gelblich weiß, orangegelb

Most Common Activator

S2-

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

159

Space Group

P31c

Cell parameters a (Å)

12.7961

Cell parameters b (Å)

-

Cell parameters c (Å)

21.4094

Cell parameters a/b or c/a

1.673

Cell parameters c/b

-

Z

1

Volume (ų)

3035.92

Crystal structure

Kristallgitter besteht aus großen Käfigen aus zwei 6er-Ringen, verbunden durch 15 6er- und 6 4er-Ringe, umgeben von kleineren Käfigen aus 6er-Doppelringen, die intern mit 4er-Ringen verbunden sind.

Kristallgitter:

Merlino and Mellini (1976), Ivanov and Sapozhnikov (1975): hexagonal, P63mc, 186, 6mm

Ballirano et al. (1997): trigonal, P31c, 159, 3m

X-Ray Powder Diffraction

3.688 (100), 3.298 (100), 4.82 (80), 3.997 (60), 2.865 (60), 2.130 (60), 1.792 (60)

Morphology

säulig-spindelförmige sowie z.T. undeutliche Kristalle; prismatisch-bipyramidal; Kristallgrößen bis über 2 cm bekannt!; Körner; derb

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5.5 - 6

VHN (Hardness Vickers)

610 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.65

2.531 ( ρ calc. Mineralienatlas )

Radioactivity

Radioaktivität von Afghanit ist kaum nachweisbar.

Instability

+++ Säuren

Chemical Properties and Tests

chemisch und unter dem Lötrohr, ..

(Co-)Type locality

(Co-)Type locality

Afghanistan/Badachshan (Badakhshan; Badahsan), Provinz/Kuran va Munjan, Bezirk/Kokscha-Tal/Sar-e-Sang/Ladjuar Medam (Lajur Madan)

Type material

Das Typmaterial befindet sich im mineralogisch-kristallographischen Labor der Pierre und Marie Universität und in der nationalen Bergbauschule in Paris, Frankreich und im naturhistorischen Museum in London, England.

Preface

Occurrences

kontaktmetasomatisch, in Na-reichen Marmoren;

Associations

Cancrinit, Bystrit, Tounkit, Lasurit, Sodalith, Nephelin, Phlogopit, Olivin, Diopsid, Vesuvianit, Calcit, Pyrit

Rareness

selten

Name from

Benannt nach dem Fundland.

Author (Name, Year)

Bariand & Cesbron & Giraud, 1968

Relevance, Usage

Sammlermineral

Collector information

Systematikmineral, nicht einfach zu bekommen

References

Bulletin de la Société Française Minéralogie et de Cristallographie 91 (1968), 34.

Paolo Ballirano, Ferdinando Bosi: Thermal behavior of afghanite, an ABABACAC member of the cancrinite group. American Mineralogist 97 (2012) S. 630-640. - [Chemische Formel, Kristalldaten]

European Journal of Mineralogy 9 (1997), 21

American Mineralogist 53 p. 2105

IMA group assignments

 
 
 
 

 
 
(Na15K5Ca11)(Si24Al24O96)(SO4)6Cl6
trigonal
P31c

 
 
Na(Si2Al)O6·H2O
orthorhombisch
Ibca

 
 
 
kubisch
P43n

 
 
Na6Ca2Al6Si6O24(CO3)2
hexagonal
P63

 
 
Na3Ca(Si3Al3)O12(SO4)
kubisch
P43n

 
 
KAlSiO4
hexagonal
P63

 
 
Na7Ca(Al6Si6O24)(SO4)(S3)-⋅H2O
kubisch
P43n

 
 
K(AlSi2)O6
tetragonal
I41/a

 
 
Na3K(Al4Si4O16)
hexagonal
P63

 
 
Na8Al6Si6O24(SO4)
kubisch
P43m

 
 
Na4Al3Si3O12Cl
kubisch
P43n

 
 
Na8(Al6Si6)O24(SO4)·2H2O
hexagonal
P63

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Actuality: 01. Dec 2024 - 22:36:43

Other languages

Latvian

Afganīts

Dutch

Afghaniet

German

Afghanit

Spanish

Afghanita

English

Afghanite

French

Afghanite

Russian

Афганит

CNMNC (IMA)-Number

IMA 1967-041

CNMNC symbol

Symbol

Afg

Locations with GPS information

IDs

GUSID (Global unique identifier short form) y7_RHsem9km4BrzBGcuzHg
GUID (Global unique identifier) 1ED1BFCB-A6C7-49F6-B806-BCC119CBB31E
Database ID 21