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Pyrophyllite (Pyrophyllit)

Pictures (33 Images total)

Pyrophyllite
Views (File:
1500616092
): 3253
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./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 / Mariposa Co. / Kalifornien (California) / USA
Pyrophyllit
Views (File:
1192546931
): 7447
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
): 3644
Pyrophyllit
Größe: 72x50x35 mm; Fundort: Hillsboro District, Orange Co., North Carolina, USA
Copyright: Dragon Minerals; Contribution: slugslayer
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: slugslayer 2009-04-13
Locality: Hillsboro District / Orange Co. / North Carolina / USA
Pyrophyllit
Views (File:
1476002822
): 3158
Pyrophyllit
Größe: 43x34 mm; Fundort: Champion Mine, Laws, White Mts, Mono Co., California, USA
Copyright: John Sobolewski; Contribution: slugslayer
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: slugslayer 2016-10-09
Locality: Champion Mine / Laws / White Mts / Mono Co. / Kalifornien (California) / USA
Pyrophyllit
Views (File:
1483188859
): 2643
Pyrophyllit
Größe: 50x50x40 mm; Fundort: Indian Gulch, Mariposa Co., Kalifornien, USA
Copyright: Dan Weinrich; Contribution: slugslayer
Location: USA/Kalifornien (California)/Mariposa Co./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: slugslayer 2016-12-31
Locality: Indian Gulch / Mariposa Co. / Kalifornien (California) / USA
Pyrophyllit
Views (File:
1222782765
): 4563
Pyrophyllit
Fo.: Indian Gulch, Mariposa Co., Kalifornien, USA, radialstahlige, gelbbraune XX, BB: 9,0mm
Copyright: Hannes Osterhammer; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A012688, Donator: Melanie Albert
Location: USA/Kalifornien (California)/Mariposa Co./Indian Gulch
Mineral: Pyrophyllite
Image: 1222782765
Rating: 7.33 (votes: 3)
License: Usage for Mineralienatlas project only
Pyrophyllit (SNr: A012688)

Fo.: Indian Gulch, Mariposa Co., Kalifornien, USA, radialstahlige, gelbbraune XX, BB: 9,0mm
Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2008-09-30
Locality: Indian Gulch / Mariposa Co. / Kalifornien (California) / USA

You find additional Pyrophyllit 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

Volumne (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, Oblast (Sverdlovskaya)/Jekaterinburg/Berjosowski (Beryozovsky)/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

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