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Pyrophyllite

Pictures (32 Images total)

Pyrophyllite
Views (File:
1500616092
): 3638
Pyrophyllite
Perfect quality, pyrophyllite specimen, from Indian Gulch Mine, Santa Cruz Mountain, Hornitos District, West Belt, Mariposa Co., California, USA; Size 63 х 55 х 41 mm
Copyright: pegmatite; Contribution: pegmatite
Location: USA/Kalifornien (California)/Mariposa Co./West Belt/Hornitos Mining District/Santa Cruz Mountain/Indian Gulch
Mineral: Pyrophyllite
Image: 1500616092
Rating: 9 (votes: 2)
License: Usage for Mineralienatlas project only
Pyrophyllite

Perfect quality, pyrophyllite specimen, from Indian Gulch Mine, Santa Cruz Mountain, Hornitos District, West Belt, Mariposa Co., California, USA; Size 63 х 55 х 41 mm
Copyright: pegmatite
Contribution: pegmatite 2017-07-21
Locality: Indian Gulch / Santa Cruz Mountain / Hornitos Mining District / West Belt / Mariposa Co. / Kalifornien (California) / USA
Pyrophyllit
Views (File:
1192546931
): 7590
Pyrophyllit
FO: Leutachkopf, Untersulzbachtal, Neukirchen, Pinzgau, Salzburg, Österreich. Cremefarbene, radialstrahlig aufgewachsene Kristalle. BB: 8 mm
Copyright: Stefan; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A006501, Donator: Manfred Seitz
Location: Österreich/Salzburg/Zell am See, Bezirk (Pinzgau)/Untersulzbachtal/Leutachkopf-Stockeralp Gebiet
Mineral: Pyrophyllite
Image: 1192546931
Rating: 7.5 (votes: 2)
License: Usage for Mineralienatlas project only
Pyrophyllit (SNr: A006501)

FO: Leutachkopf, Untersulzbachtal, Neukirchen, Pinzgau, Salzburg, Österreich. Cremefarbene, radialstrahlig aufgewachsene Kristalle. BB: 8 mm

Collection: Lithothek der Münchener Micromounter
Copyright: Stefan
Contribution: Münchener Micromounter 2007-10-16
Locality: Leutachkopf-Stockeralp Gebiet / Untersulzbachtal / Zell am See, Bezirk (Pinzgau) / Salzburg / Österreich
Pyrophyllit
Views (File:
1239612009
): 3806
Pyrophyllit
Größe: 72x50x35 mm; Fundort: Hillsboro District, Orange Co., North Carolina, USA
Copyright: Dragon Minerals; Contribution: Philip Blümner
Location: USA/North Carolina/Orange Co./Hillsboro District
Mineral: Pyrophyllite
Image: 1239612009
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Pyrophyllit

Größe: 72x50x35 mm; Fundort: Hillsboro District, Orange Co., North Carolina, USA
Copyright: Dragon Minerals
Contribution: Philip Blümner 2009-04-13
Locality: Hillsboro District / Orange Co. / North Carolina / USA
Pyrophyllit
Views (File:
1476002822
): 3352
Pyrophyllit
Größe: 43x34 mm; Fundort: Champion Mine, Laws, White Mts, Mono Co., California, USA
Copyright: John Sobolewski; Contribution: Philip Blümner
Location: USA/Kalifornien (California)/Mono Co./White Mts/Laws/Champion Mine
Mineral: Pyrophyllite
Image: 1476002822
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Pyrophyllit

Größe: 43x34 mm; Fundort: Champion Mine, Laws, White Mts, Mono Co., California, USA
Copyright: John Sobolewski
Contribution: Philip Blümner 2016-10-09
Locality: Champion Mine / Laws / White Mts / Mono Co. / Kalifornien (California) / USA
Pyrophyllit
Views (File:
1483188859
): 2921
Pyrophyllit
Größe: 50x50x40 mm; Fundort: Indian Gulch, Mariposa Co., Kalifornien, USA
Copyright: Dan Weinrich; Contribution: Philip Blümner
Location: USA/Kalifornien (California)/Mariposa Co./West Belt/Hornitos Mining District/Santa Cruz Mountain/Indian Gulch
Mineral: Pyrophyllite
Image: 1483188859
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Pyrophyllit

Größe: 50x50x40 mm; Fundort: Indian Gulch, Mariposa Co., Kalifornien, USA
Copyright: Dan Weinrich
Contribution: Philip Blümner 2016-12-31
Locality: Indian Gulch / Santa Cruz Mountain / Hornitos Mining District / West Belt / Mariposa Co. / Kalifornien (California) / USA

You find additional specimen at the Geolitho Museum

Collectors Summary

Color braun grün, bräunlichgelb, grünlich, graugrün, grauweiß
Streak color weiß
Hardness (Mohs) 1.5
Solubility + warme konz. H2SO4
Crystal System monoklin, C2/c

Chemism

Chemical formula

Al2Si4O10(OH)2

Chemical composition

Aluminium, Silicium, Sauerstoff, Wasserstoff

Unit weight: 360.3142504 u; Number of atoms in the formula: 20

Info

Empirical formula:

Al2Si4O10(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.56

2

10.00

1.0079470

2.0158940
Oxygen

O

53.28

12

60.00

15.9994300

191.9931600
Aluminium

Al

14.98

2

10.00

26.9815382

53.9630764
Silicon

Si

31.18

4

20.00

28.0855300

112.3421200

Analysis wt%

SiO2 : 67.24, Al2O3 : 26.95, FeO : 0.45, H2O : 4.64 (Ref: American Mineralogist 78)

Strunz 9th edition incl. updates

9.EC.10

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

Lapis Classification

VIII/H.09-010

VIII: SILIKATE
H: Schichtsilikate
9: Glimmerartige Schicht-silikate mit Baugruppen [Si4O10] 4- und verwandte Strukturen

Classification by Hölzel

9.EB.200

9: SILICATES
E: Phyllosilicates
B: ~[(OH)2|Si4O10] Pyrophyllite-Talc-Group

IMA status

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

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Pyrophyllite-Talc group

Optical Properties

Color

braun grün, bräunlichgelb, grünlich, graugrün, grauweiß

Streak color

weiß

Diaphaneity (Transparency)

durchscheinend bis opak

max. Birefringence

0.054
Birefringence chart\! Pyrophyllite title=Birefringence chart Pyrophyllite

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

1.545

RI value β

1.588

RI value γ / ε

1.599

Ri mean

1.577

2V angle

Biaxial (-) 58°!

Optical Data Luminescence

Luminescence

fluoreszierend

Color LW-UV (365nm)

  

gelblich weiß

Color SW-UV (254nm)

  

gelblich weiß

LW-UV Other Colors

    

blassgelb, gelbbraun

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

15

Space Group

C2/c

Cell parameters a (Å)

5.17

Cell parameters b (Å)

8.96

Cell parameters c (Å)

18.67

Cell parameters a/b or c/a

0.577

Cell parameters c/b

2.084

Cell parameters α

90°

Cell parameters β

100.0

Cell parameters γ

90°

Z

4

Volume (ų)

851.715

X-Ray Powder Diffraction

9.21(60),
4.58(50),
4.40(20),
4.17(10),
3.08(100),
2.55(10),
2.44(10),
1.848(10)
XRD chart Pyrophyllite

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)

1.5

VHN (Hardness Vickers)

18 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.8 - 2.9 / Durchschnittlich = 2.84

2.81 ( ρ calc. Mineralienatlas )

Instability

+ warme konz. H2SO4

(Co-)Type locality

(Co-)Type locality

Russland/Ural, Föderationskreis/Swerdlowsk (Sverdlovskaya, Sverdlovsk), Oblast/Berjosowski (Beryozovsky), Stadtkreis/Berezovskoye Au-Lagerstätte/Staro-Pyshminskoye

Preface

Name from

dem griechischen pyr - Feuer und phyllon - Blatt

Author (Name, Year)

Hermann, 1829

References

Mineralogical Journal (Tokyo) 2 (1958), 236

IMA group assignments

 
Pyrophyllite-Talc group
 
 
 

 
 
Ferripyrophyllite
Fe3+Si2O5(OH)
monoklin
C2/c

 
 
Minnesotaite
Fe2+3Si4O10(OH)2
triklin
P1

 
 
Pyrophyllite
Al2Si4O10(OH)2
monoklin
C2/c

 
 
Talc
Mg3Si4O10(OH)2
monoklin
C2/c

 
 
Willemseite
(Ni,Mg)3Si4O10(OH)2
monoklin
Cc

Refresh list

Actuality: 15. Jan 2025 - 18:52:44

Varieties

Agalmatolite

Chrome-Pyrophyllite

Chromhaltiger Pyrophyllit

Other languages

Spanish

Pirofilita

German

Pyrophyllit

English

Pyrophyllite

French

Pyrophyllite

Russian

Пирофиллит

Simplified Chinese

叶蜡石

Alternative Name

Spanish

Ablikita

Ablikite

German

Gelpyrophyllit

Spanish

Gelpyrophyllita

Gelpyrophyllite

Pyrophyllita

Simplified Chinese

叶腊石

CNMNC symbol

Symbol

Prl

Locations with GPS information

IDs

GUSID (Global unique identifier short form) fNpjzl-vv0egvP1ASeMKhQ
GUID (Global unique identifier) CE63DA7C-AF5F-47BF-A0BC-FD4049E30A85
Database ID 3172