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Pyrophyllite

Pictures (30 Images total)

Pyrophyllite
Views (Image: 1500616092): 2450
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 (Image: 1192546931): 6783
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 (Image: 1239612009): 2968
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 (Image: 1476002822): 2456
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 (Image: 1483188859): 1982
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 (Image: 1222782765): 4398
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

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

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

Preface

Name from

dem griechischen pyr - Feuer und phyllon - Blatt

Author (Name, Year)

Hermann, 1829

References

Mineralogical Journal (Tokyo) 2 (1958), 236

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Pyrophyllite

Al2Si4O10(OH)2

monoklin : 2/m : C2/c

9.EC.10

Ferripyrophyllite

Fe3+Si2O5(OH)

monoklin : 2/m : C2/c

9.EC.10

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Pyrophyllite

Al2Si4O10(OH)2

monoklin : 2/m : C2/c

VIII/H.09-010

Ferripyrophyllite

Fe3+Si2O5(OH)

monoklin : 2/m : C2/c

VIII/H.09-020

Macaulayite

(Fe3+,Al)24Si4O43(OH)2

VIII/H.09-030

Talc

Mg3Si4O10(OH)2

monoklin : 2/m : C2/c

VIII/H.09-040

Minnesotaite

Fe2+3Si4O10(OH)2

triklin : 1 : P1

VIII/H.09-050

Willemseite

(Ni,Mg)3Si4O10(OH)2

monoklin : m : Cc

VIII/H.09-060

Kegelite

Pb4Al2Si4O10(SO4)(CO3)2(OH)4

monoklin : 2/m, 2, m : A2/m, A2, Am

VIII/H.09-070

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Pyrophyllite

Al2Si4O10(OH)2

monoklin : 2/m : C2/c

9.EB.200

Brinrobertsite

(Na,K,Ca)0.3(Al,Fe,Mg)4(Si,Al)8O20(OH)4·3.5H2O

9.EB.210

Ferripyrophyllite

Fe3+Si2O5(OH)

monoklin : 2/m : C2/c

9.EB.220

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

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Pyrophyllit
Google-Bilder-Suche - search for: Pyrophyllit
Mineralogisch-Petrographisches-Institut Hamburg - search for: Pyrophyllit

English pages

Mindat - search for: Pyrophyllite
Webmineral - search for:Pyrophyllite
Handbook-of-Mineralogy - search for: Pyrophyllite
RRUFF - Raman, XRD and other mineral data - search for: Pyrophyllite
RRUFF - References and PDF downloads - search for: Pyrophyllite
American-Mineralogist-Crystal-Structure-Database - search for: Pyrophyllite
Athena - search for: Pyrophyllite

Russian pages

Webmineral.ru - search for: Пирофиллит

Mineral Dealer

German pages

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Crystal-Treasure.com - search for: Pyrophyllit
Bosse - search for: Pyrophyllit

Locations with GPS information