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Siderophyllite (Siderophyllit)

Pictures (3 Images total)

Siderophyllit
Views (File:
1235598881
): 1977, Rating: 3.75
Siderophyllit
Cava Tormaline, Cuasso al Monte, Varese, Lombardei, Italien; BB 2 mm; grünliche Kristalle mit schwarzen Anatas-Oktaedern
Copyright: Münchener Micromounter; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A012852, Donator: Michiel Desittere
Location: Italien/Lombardei (Lombardia), Region/Varese, Provinz/Cuasso al Monte
Mineral: Siderophyllite
Image: 1235598881
Rating: 3.75 (votes: 4)
License: Usage for Mineralienatlas project only
Siderophyllit (SNr: A012852)

Cava Tormaline, Cuasso al Monte, Varese, Lombardei, Italien; BB 2 mm; grünliche Kristalle mit schwarzen Anatas-Oktaedern
Collection: Lithothek der Münchener Micromounter
Copyright: Münchener Micromounter
Contribution: Münchener Micromounter 2009-02-25
Locality: Cuasso al Monte / Varese, Provinz / Lombardei (Lombardia), Region / Italien
Siderophyllit
Views (File:
1394644206
): 1101
Siderophyllit
Microkristalline gelbliche Kristalle auf Chlorit oder Klinochlor und Quarz, BB = 4,5 mm, Fundort: Cava Puricelli, Cuasso al Monte, Varese Provinz, Italien.
Copyright: Hannes Osterhammer; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A011363, Donator: Fretti G.
Location: Italien/Lombardei (Lombardia), Region/Varese, Provinz/Cuasso al Monte/Cava Puricelli
Mineral: Siderophyllite
Image: 1394644206
License: Usage for Mineralienatlas project only
Siderophyllit (SNr: A011363)

Microkristalline gelbliche Kristalle auf Chlorit oder Klinochlor und Quarz, BB = 4,5 mm, Fundort: Cava Puricelli, Cuasso al Monte, Varese Provinz, Italien.
Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2014-03-12
Locality: Cava Puricelli / Cuasso al Monte / Varese, Provinz / Lombardei (Lombardia), Region / Italien
Siderophyllit
Views (File:
1707074428
): 52
Siderophyllit
7. Sohle, Sammelrolle 703. Zwitterstock, Altenberg, Osterzgebirge, Sachsen. 65x48mm
Copyright: Doc Diether; Contribution: Doc Diether
Collection: Doc Diether
Location: Deutschland/Sachsen/Sächsische Schweiz-Osterzgebirge, Landkreis/Altenberg/Zwitterstock
Mineral: Siderophyllite
Image: 1707074428
License: Usage for Mineralienatlas project only
Siderophyllit

7. Sohle, Sammelrolle 703. Zwitterstock, Altenberg, Osterzgebirge, Sachsen. 65x48mm
Collection: Doc Diether
Copyright: Doc Diether
Contribution: Doc Diether 2024-02-04
Locality: Zwitterstock / Altenberg / Sächsische Schweiz-Osterzgebirge, Landkreis / Sachsen / Deutschland

You find additional specimen at the Geolitho Museum

Collectors Summary

Color blau grün, dunkelbraun, schwarz
Streak color grünlich grau
Hardness (Mohs) 2.5
Solubility +++ H2SO4
Crystal System monoklin, C2/m

Chemism

Chemical formula

KFe22+Al(Al2Si2)O10(F,OH)2

Chemical composition

Aluminium, Eisen, Silicium, Fluor, Kalium, Sauerstoff, Wasserstoff

Unit weight: 484.899977975 u; Number of atoms in the formula: 20.5

Info

Empirical formula:

KFe2Al(Al2Si2)O10(F0.75(OH)0.25)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.10

0.5

2.44

1.0079470

0.5039735
Oxygen

O

34.65

10.5

51.22

15.9994300

167.9940150
Fluorine

F

5.88

1.5

7.32

18.9984033

28.4976049
Aluminium

Al

16.69

3

14.63

26.9815382

80.9446146
Silicon

Si

11.58

2

9.76

28.0855300

56.1710600
Potassium

K

8.06

1

4.88

39.0983100

39.0983100
Iron

Fe

23.03

2

9.76

55.8452000

111.6904000

Analysis wt%

SiO2 : 24.94, Al2O3 : 31.74, FeO : 29.82, K2O : 9.77, H2O : 3.74 (Ref: berechnet)

Strunz 9th edition incl. updates

9.EC.20

9: Silikate (Germanate)
E: Schichtsilikate (Phyllosilikate)
C: Schichtsilikate (Phyllosilikate) mit Glimmer Tafeln, zusammengesetzt aus tetrahedralen oder octahedralen Netzen
20:Phlogopit-Gruppe

Lapis Classification

VIII/H.11-160

VIII: SILIKATE
H: Schichtsilikate
11: Glimmerartige Schicht-silikate mit Baugruppen [Si4O10] 4- und verwandte Strukturen; Glimmer-Gruppe; Lithionit/Biotit-Reihe

Classification by Hölzel

9.EE.100

9: SILICATES
E: Phyllosilicates
E: ~[(OH)2|Al2Si2O10] Margarite-Group

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Mica group  ⇒ True micas

Optical Properties

Color

blau grün, dunkelbraun, schwarz

Streak color

grünlich grau

Diaphaneity (Transparency)

transparent bis teilweise opak

max. Birefringence

0.081
Birefringence chart\! Siderophyllite title=Birefringence chart Siderophyllite

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

1.616

RI value β

1.696

RI value γ / ε

1.697

Ri mean

1.670

2V angle

Biaxial (-) 20°!

Crystallography

Crystal System

monoklin

Class (H-M)

2

Space Group

C2/m

Cell parameters a (Å)

5.328

Cell parameters b (Å)

9.228

Cell parameters c (Å)

10.096

Cell parameters a/b or c/a

0.577

Cell parameters c/b

1.094

Cell parameters α

90°

Cell parameters β

100.17

Cell parameters γ

90°

Z

2

Volume (ų)

488.589

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

2.5

VHN (Hardness Vickers)

68 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3

3.296 ( ρ calc. Mineralienatlas )

Instability

+++ H2SO4

(Co-)Type locality

(Co-)Type locality

USA/Colorado/El Paso Co./Pikes Peak

IMA group assignments

Other languages

German

Siderophyllit

Spanish

Siderophyllita

English

Siderophyllite

Russian

Сидерофиллит

Simplified Chinese

铁叶云母

Japanese

ｼﾃﾞﾛﾌｨﾙ石

Alternative Name

Hdyroxyl-siderophyllite

Hydroxyl-siderophyllite

CNMNC symbol

Symbol

Sid

Locations with GPS information

IDs

GUSID (Global unique identifier short form) O4rZPsvJFUCKaTvSFamtcg
GUID (Global unique identifier) 3ED98A3B-C9CB-4015-8A69-3BD215A9AD72
Database ID 3517