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Ferripyrophyllite

Collectors Summary

Color bräunlichgelb
Streak color hellgelb
Hardness (Mohs) 1.75
Crystal System monoklin, C2/c

Chemism

Chem­ical formula

Fe3+Si2O5(OH)

Chem­ical com­po­si­tion

Eisen, Silicium, Sauerstoff, Wasserstoff

Unit weight: 209.020787 u; Number of atoms in the formula: 10

Info

Empirical formula:

FeSi2O5(OH)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.48

1

10.00

1.0079470

1.0079470

Oxygen

O

45.93

6

60.00

15.9994300

95.9965800

Silicon

Si

26.87

2

20.00

28.0855300

56.1710600

Iron

Fe

26.72

1

10.00

55.8452000

55.8452000

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.09-020

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

Clas­sifica­tion by Hölzel

9.EB.220

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

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

bräunlichgelb

Streak color

hellgelb

Diaphane­ity (Trans­parency)

transparent bis durchscheinend

max. Birefrin­gence

0.036

Birefringence chart\! Ferripyrophyllite title=Birefringence chart Ferripyrophyllite

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

1.655

RI value β

1.677

RI value γ / ε

1.687

Ri mean

1.673

2V angle

Biaxial (-) 68°~

Pleochro­ism

grünlich bis hellgelb

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

15

Space Group

C2/c

Cell param­e­ters a (Å)

5.26

Cell param­e­ters b (Å)

9.10

Cell param­e­ters c (Å)

19.1

Cell param­e­ters a/b or c/a

0.578

Cell param­e­ters c/b

2.099

Cell param­e­ters α

90°

Cell param­e­ters β

95.50

Cell param­e­ters γ

90°

Z

8

Volumne (ų)

910.032

X-Ray Pow­der Diffrac­tion

9.6(80),
4.54(100),
3.17(70),
2.62(40),
2.47(40),
1.725(30),
1.665(30),
1.518(80)

XRD chart Ferripyrophyllite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Physical Properties

Hard­ness (Mohs)

1.75

VHN (Hard­ness Vick­ers)

24 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.05 (berechnet) 2.8 (gemessen)

3.051 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Deutschland/Sachsen/Erzgebirgskreis/Eibenstock

Preface

Author (Name, Year)

Chukhrov & Soyagin & Drits & Gorshkov & Ermilova & Goilo & Rudnitskaya

References

Handbook of Mineralogy (Anthony et al.), 2 (1995), 239

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

Other languages

Spanish

Ferripirofilita

German

Ferripyrophyllit

English

Ferripyrophyllite

French

Ferripyrophyllite

Russian

Феррипирофиллит

Alternative Name

Spanish

Ferripyrophyllita

IMA Number

IMA 1978-062

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

German pages

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

English pages

Mindat - search for: Ferripyrophyllite
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Handbook-of-Mineralogy - search for: Ferripyrophyllite
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RRUFF - References and PDF downloads - search for: Ferripyrophyllite
American-Mineralogist-Crystal-Structure-Database - search for: Ferripyrophyllite
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Russian pages

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German pages

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