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Astrophyllite

Pictures (70 Images total)

Astrophyllite
Views (File:
1615902234
): 1274
Astrophyllite
Large and perfect quality, Astrophyllite specimen, from Eveslogchorr Mt, Khibiny Massif, Murmansk Oblast, Russia; Dimensions: 110 mm x 82 mm x 77 mm
Copyright: pegmatite; Contribution: pegmatite
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Eweslogchorr (Eveslogchorr)
Mineral: Astrophyllite
Image: 1615902234
Rating: 9 (votes: 1)
License: Usage for Mineralienatlas project only
Astrophyllite

Large and perfect quality, Astrophyllite specimen, from Eveslogchorr Mt, Khibiny Massif, Murmansk Oblast, Russia; Dimensions: 110 mm x 82 mm x 77 mm
Copyright: pegmatite
Contribution: pegmatite 2021-03-16
Locality: Eweslogchorr (Eveslogchorr) / Chibiny (Khibiny) / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland
Astrophyllit
Views (File:
1322733839
): 5552
Astrophyllit
Bildbreite: 2,5 mm; Fundort: Serra de Agua de Pau, Sao Miguel, Insel, Azoren, Portugal
Copyright: Jean-Marc Johannet; Contribution: Hg
Location: Portugal/Azoren (Ilhas dos Açores), Autonome Region/Sao Miguel, Insel/Lagoa, Kreis/Serra de Agua de Pau
Mineral: Astrophyllite
Image: 1322733839
Rating: 7.67 (votes: 3)
License: Usage for Mineralienatlas project only
Astrophyllit

Bildbreite: 2,5 mm; Fundort: Serra de Agua de Pau, Sao Miguel, Insel, Azoren, Portugal
Copyright: Jean-Marc Johannet
Contribution: Hg 2011-12-01
Locality: Serra de Agua de Pau / Lagoa, Kreis / Sao Miguel, Insel / Azoren (Ilhas dos Açores), Autonome Region / Portugal
Astrophyllit
Views (File:
1360631268
): 3797
Astrophyllit
Bildbreite: 2 mm, Fundort: Eweslogchorr, Khibiny, Kola-Halbinsel, Murmansk, Russland
Copyright: Luigi Chiappino; Contribution: thdun5
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Eweslogchorr (Eveslogchorr)
Mineral: Astrophyllite
Image: 1360631268
Rating: 8 (votes: 2)
License: Usage for Mineralienatlas project only
Astrophyllit

Bildbreite: 2 mm, Fundort: Eweslogchorr, Khibiny, Kola-Halbinsel, Murmansk, Russland
Copyright: Luigi Chiappino
Contribution: thdun5 2013-02-12
Locality: Eweslogchorr (Eveslogchorr) / Chibiny (Khibiny) / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland
Astrophyllit
Views (File:
1635789729
): 485
Astrophyllit
BB: 1,4 mm; Astrophyllit, Agua de Pau Vulkan, San Miguel, Azoren
Copyright: Harald Biecker; Contribution: Harald Biecker
Collection: Harald Biecker
Location: Portugal/Azoren (Ilhas dos Açores), Autonome Region/Sao Miguel, Insel/Lagoa, Kreis/Água de Pau Vulkan
Mineral: Astrophyllite
Image: 1635789729
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Astrophyllit  D

BB: 1,4 mm; Astrophyllit, Agua de Pau Vulkan, San Miguel, Azoren
Collection: Harald Biecker
Copyright: Harald Biecker
Contribution: Harald Biecker 2021-11-01
Locality: Água de Pau Vulkan / Lagoa, Kreis / Sao Miguel, Insel / Azoren (Ilhas dos Açores), Autonome Region / Portugal
Astrophyllite
Views (File:
1685254449
): 85
Astrophyllite
Astrophyllite specimen, from Eveslogchorr Mt, Khibiny Massif, Murmansk Oblast, Russia; Dimensions: 47 mm x 28 mm x 22 mm
Copyright: pegmatite; Contribution: pegmatite
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Eweslogchorr (Eveslogchorr)
Mineral: Astrophyllite
Image: 1685254449
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Astrophyllite

Astrophyllite specimen, from Eveslogchorr Mt, Khibiny Massif, Murmansk Oblast, Russia; Dimensions: 47 mm x 28 mm x 22 mm
Copyright: pegmatite
Contribution: pegmatite 2023-05-28
Locality: Eweslogchorr (Eveslogchorr) / Chibiny (Khibiny) / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland

You find additional specimen at the Geolitho Museum

Collectors Summary

Color braun, bräunlich rot, bronzegelb, goldgelb
Streak color gelblich-braun
Hardness (Mohs) 3
Solubility +++ HF, ++ konz. H2SO4, HCl
Crystal System triklin, A1

Chemism

Chemical formula

K2Na(Fe2+,Mn)7Ti2[O2|F|(OH)4|Si8O24]

Chemical composition

Eisen, Mangan, Natrium, Silicium, Titan, Fluor, Kalium, Sauerstoff, Wasserstoff

Unit weight: 1313.946808775 u; Number of atoms in the formula: 55

Info

Empirical formula:

K2Na(Fe0.75Mn0.25)7Ti2[O2F(OH)4Si8O24]

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.31

4

7.27

1.0079470

4.0317880
Oxygen

O

36.53

30

54.55

15.9994300

479.9829000
Fluorine

F

1.45

1

1.82

18.9984033

18.9984033
Sodium

Na

1.75

1

1.82

22.9897702

22.9897702
Silicon

Si

17.10

8

14.55

28.0855300

224.6842400
Potassium

K

5.95

2

3.64

39.0983100

78.1966200
Titanium

Ti

7.29

2

3.64

47.8671000

95.7342000
Manganese

Mn

7.32

1.75

3.18

54.9380499

96.1415873
Iron

Fe

22.31

5.25

9.55

55.8452000

293.1873000

Analysis wt%

SiO2 : 36.64, TiO2 : 10.76, ZrO2 : 0.66, Nb2O5 : 0.77, FeO : 31.50, MnO : 5.68, CaO : 0.98, Na2O : 2.52, K2O : 5.13, H2O : 5.92 (Ref: Mineralogical Magazine 82)

Strunz 9th edition incl. updates

9.DC.05

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
C: Ketten- und Bandsilikate mit verzweigten 2-periodischen Einzelketten, Si2O6 + 2SiO3 -> Si4O12
05:Astrophyllit-Gruppe

Lapis Classification

VIII/G.12-040

VIII: SILIKATE
G: Übergangsstrukturen zwischen Ketten- und Schichtsilikaten
12: Astrophyllit-Gruppe

Classification by Hölzel

9.DU.500

9: SILICATES
D: Inosilicates; ~[Si2O6]4--...2-Chain
U: Chains to Phyllosilicates
5: Astrophyllite-Group

IMA status

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

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Astrophyllite supergroup  ⇒ Astrophyllite group

Optical Properties

Color

braun, bräunlich rot, bronzegelb, goldgelb

Streak color

gelblich-braun

Diaphaneity (Transparency)

durchscheinend bis opak

max. Birefringence

0.055
Birefringence chart\! Astrophyllite title=Birefringence chart Astrophyllite

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

1.678

RI value β

1.703

RI value γ / ε

1.733

Ri mean

1.705

2V angle

Biaxial (+) 75°

Optical Data Luminescence

Luminescence

keine Fluoreszenz bekannt

Crystallography

Crystal System

triklin

Class (H-M)

1

Space Group number

2

Space Group

A1

Cell parameters a (Å)

11.72

Cell parameters b (Å)

5.41

Cell parameters c (Å)

21.14

Cell parameters a/b or c/a

2.166

Cell parameters c/b

3.908

Cell parameters α

90°..

Cell parameters β

94°..

Cell parameters γ

103°..

Z

2

Volume (ų)

1302.681

Crystal structure

aufgeklärt, siehe Fernando Cámara, Elena Sokolova, Yassir Abdu und Frank C. Hawthorne: THE CRYSTAL STRUCTURES OF NIOBOPHYLLITE, KUPLETSKITE-(Cs) AND Sn-RICH ASTROPHYLLITE: REVISIONS TO THE CRYSTAL CHEMISTRY OF THE ASTROPHYLLITE-GROUP MINERALS. The Canadian Mineralogist 48 (2010) S. 1-16. Erratum dazu: The Canadian Mineralogist 48 (2010) S. 431.

X-Ray Powder Diffraction

10.50(100),
9.67(10),
3.500(20),
2.743(10),
2.733(10),
2.540(10),
2.523(10),
2.263(10)
XRD chart Astrophyllite

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)

3

VHN (Hardness Vickers)

83 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.3 - 3.4 / Durchschnittlich = 3.34

3.35 ( ρ calc. Mineralienatlas )

Instability

+++ HF, ++ konz. H2SO4, HCl

(Co-)Type locality

(Co-)Type locality

Norwegen/Vestfold, Provinz/Larvik, Kommune/Langesundsfjord/Laven (Låven; Skådön; Skadön; Lamö; Lamanskjaer)

Type material

Mineralogische Sammlung der TU Bergakademie Freiberg

Collection number of type material

26246 / W 4,7

Paragenesis of type material

Biotit, Aegirin, Orthoklas, Galenit, Chalkopyrit, Fahlerz

Preface

Name from

dem griechischen aster - Stern und phyllon - Blatt

Author (Name, Year)

Scheerer, 1854

References

Canadian Mineralogist 41 (2003), 1

IMA group assignments

 
Astrophyllite supergroup
 
 
 

 
 
Astrophyllite group
 
 
 

 
 
 
Astrophyllite
K2Na(Fe2+,Mn)7Ti2[O2|F|(OH)4|Si8O24]
triklin
A1

 
 
 
Bulgakite
Li2(Ca,Na)Fe2+7Ti2(Si4O12)2O2(OH)4(F,O)(H2O)2
triklin
P1

 
 
 
Hydroastrophyllite
(H3O,K)2Ca(Fe2+,Mn)5-6Ti2[O2|F|(OH)4|Si8O24]
triklin
 

 
 
 
Nalivkinite
Li2NaFe2+7Ti2Si8O26(OH)4F
triklin
P1

 
 
 
Niobophyllite
K2NaFe2+7(Nb,Ti)2Si8O26(OH)4(F,O)
triklin
P1, P1

 
 
 
Tarbagataite
(K,☐)Ca(Fe2+,Mn)7Ti2(Si4O12)2O2(OH)5
triklin
P1

 
 
 
Zircophyllite
K2NaFe2+7Zr2(Si4O12)2O2(OH)4F
triklin
P1

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Actuality: 30. Sep 2024 - 21:28:50

Other languages

Spanish

Astrofilita

German

Astrophyllit

French

Astrophyllite

English

Astrophyllite

Russian

Астрофиллит

Simplified Chinese

星叶石

Alternative Name

German

Aastrophyllit

Spanish

Aastrophyllita

Aastrophyllite

German

Asterophyllit

Spanish

Asterophyllita

Asterophyllite

Astrofillite

German

Astrophengit

Spanish

Astrophyllita

Japanese

星葉石

CNMNC symbol

Symbol

Ast

Rock part of

 
Rocks

 
 
igneous rocks and sediments

 
 
 
crystalline igneous rocks

 
 
 
 
normal crystalline rocks

 
 
 
 
 
coarse-grained crystalline rocks

 
 
 
 
 
 
granitic-rock

 
 
 
 
 
 
 
alkali-feldspar-granite

 
 
 
 
 
 
 
 
peralkaline alkali-feldspar-granite

 
 
 
 
 
 
 
 
 
ekerite  

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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: 30. Sep 2024 - 21:28:51

Locations with GPS information

IDs

GUSID (Global unique identifier short form) KUbV_1st5ESmlY5YiXWRjw
GUID (Global unique identifier) FFD54629-2D5B-44E4-A695-8E588975918F
Database ID 230