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Proto-ferro-anthophyllite (Proto-Ferro-Anthophyllit)

Additional Functions

Collectors Summary

Color hellgelb, bräunlichgelb
Streak color weiß
Lustre Glasglanz
Hardness (Mohs) 5 - 6
Cleavages vollkommen
Crystal System orthorhombisch, Pnmn

Chemism

Chem­ical formula

(Fe2+,Mn2+)2Fe52+[Oh|Si4O11]2

Chem­ical com­po­si­tion

Eisen, Mangan, Silicium, Sauerstoff

Unit weight: 999.13338495 u; Number of atoms in the formula: 39

Info

Empirical formula:

(Fe0.75Mn0.25)2Fe5[OhSi4O11]2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

38.43

24

61.54

15.9994300

383.9863200

Silicon

Si

22.49

8

20.51

28.0855300

224.6842400

Manganese

Mn

2.75

0.5

1.28

54.9380499

27.4690250

Iron

Fe

36.33

6.5

16.67

55.8452000

362.9938000

Anal­y­sis wt%

SiO2 : 46.27, FeO : 46.39, MnO : 2.51, H2O : 1.80 (Ref: PCM98)

Strunz 9th edi­tion incl. updates

9.DD.05

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
D: Ketten- und Bandsilikate mit 2-periodischen Doppelketten, Si4O11; Amphibol-Familie, Orthoamphibole
05:Amphibole: Ortho

Lapis Clas­sifica­tion

VIII/F.12-150

VIII: SILIKATE
F: Ketten- und Bandsilikate
12: Zweierbänder [Si4O11] 6-; Amphibol-Gruppe; Orthorhombische Amphibole

Clas­sifica­tion by Hölzel

9.DF.140

9: SILICATES
D: Inosilicates; ~[Si2O6]4--...2-Chain
F: Amphiboles; Orthorhombic Amphiboles
1: Anthophyllite-Group

Dana 8th edi­tion

66.01.02.03a

66: Inosilicates Inosilicate Double-Width Unbranched Chains, W=2
01: Inosilicates Inosilicate Double-Width Unbranched Chains, W=2 with P=2 amphibole configuration

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Amphibole supergroup  ⇒ (OH,F,Cl)-dominant amphiboles  ⇒ Magnesium-iron-manganese amphiboles  ⇒ Anthophyllite (Ath) amphiboles

Optical Properties

Color

hellgelb, bräunlichgelb

Streak color

weiß

Diaphane­ity (Trans­parency)

transparent

Lus­tre

Glasglanz

max. Birefrin­gence

0.036

Birefringence chart\! Proto-ferro-anthophyllite title=Birefringence chart Proto-ferro-anthophyllite

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

1.69

RI value β

1.71

RI value γ / ε

1.726

Ri mean

1.709

2V angle

Biaxial (-) 87° (gemessen) 83.6 (berechnet)

Ori­enta­tion

X = a, Y = b, Z = c

Pleochro­ism

schwach, Schattierungen von blaßgelb

Crystallography

Crystal Sys­tem

orthorhombisch

Class (H-M)

mmm

Space Group number

58

Space Group

Pnmn

Cell param­e­ters a (Å)

9.382

Cell param­e­ters b (Å)

18.390

Cell param­e­ters c (Å)

5.343

Cell param­e­ters a/b or c/a

0.510

Cell param­e­ters c/b

0.291

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

921.854

X-Ray Pow­der Diffrac­tion

8.353(100),
3.277(30),
3.074(60),
2.879(30),
2.761(20),
2.560(90),
2.317(30),
1.535(30)

XRD chart Proto-ferro-anthophyllite

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)

5 - 6

Density (g/cm³)

3.599 ( ρ calc. Mineralienatlas )

Cleav­ages

vollkommen

Preface

Author (Name, Year)

Sueno & Matsuura, 1986

References

Journal of Mineralogical and Petrological Sciences (formerly Mineralogical Journal) 97 (2002), 127

Frank C. Hawthorne, Roberta Oberti, George E. Harlow, Walter V. Maresch, Robert F. Martin, John C. Schumacer, Mark D. Welch - Nomenclature of the amphibole supergroup, American Mineralogist, Volume 97 (2012), 2031–2048

IMA group assignments

Other languages

German

Proto-Ferro-Anthophyllit

English

Proto-ferro-anthophyllite

French

Protoferro-Anthophyllite

Spanish

Protoferroantofilita

Russian

Протоферроантофиллит

Alternative Name

English

Protoferro-anthophyllite

English

Protoferroanthophyllite

CNMNC (IMA)-Number

IMA 1986-006

CNMNC symbol

Symbol

Pfath

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

German pages

DeWikiPedia - search for: Proto-Ferro-Anthophyllit
Google-Bilder-Suche - search for: Proto-Ferro-Anthophyllit
Mineralienatlas.de (Forum) - search for: Proto-Ferro-Anthophyllit

English pages

Mindat - search for: Proto-ferro-anthophyllite
Webmineral - search for:Proto-ferro-anthophyllite
Handbook-of-Mineralogy - search for: Proto-ferro-anthophyllite
RRUFF - Raman, XRD and other mineral data - search for: Proto-ferro-anthophyllite
RRUFF - References and PDF downloads - search for: Proto-ferro-anthophyllite
American-Mineralogist-Crystal-Structure-Database - search for: Proto-ferro-anthophyllite
Strahlen.org - search for: Proto-ferro-anthophyllite

Russian pages

Webmineral.ru - search for: Протоферроантофиллит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Proto-Ferro-Anthophyllit
Crystal-Treasure.com - search for: Proto-Ferro-Anthophyllit
Bosse - search for: Proto-Ferro-Anthophyllit
Edelsteine Neuburg - Gundolf Fischer - search for: Proto-Ferro-Anthophyllit