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Afghanite

Pictures (38 Images total)

Afghanit
Views (File:
1316160740
): 2845
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
): 10134
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
): 3376
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
): 1617
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
): 59
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

 
Feldspathoid
 
 
 

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

 
 
Analcime
Na(Si2Al)O6·H2O
orthorhombisch
Ibca

 
 
Berzeline (of Necker)
 
kubisch
P43n

 
 
Cancrinite
Na6Ca2Al6Si6O24(CO3)2
hexagonal
P63

 
 
Haüyne
Na3Ca(Si3Al3)O12(SO4)
kubisch
P43n

 
 
Kalsilite
KAlSiO4
hexagonal
P63

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

 
 
Leucite
K(AlSi2)O6
tetragonal
I41/a

 
 
Nepheline
Na3K(Al4Si4O16)
hexagonal
P63

 
 
Nosean
Na8Al6Si6O24(SO4)
kubisch
P43m

 
 
Sodalite
Na4Al3Si3O12Cl
kubisch
P43n

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

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Actuality: 09. Oct 2024 - 19:00:32

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