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Ferro-ferri-pedrizite

Additional Functions

Collectors Summary

Color schwarz
Streak color grau
Lustre Glasglanz
Hardness (Mohs) 6
Cleavages vollkommen {110}
Fracture unregelmäßig, uneben
Crystal System monoklin, B2/m

Additional information / Summary

Beschrieben als Sodic-ferro-ferripedrizite durch Oberti et.al (2003), umbenannt in Ferro-Ferri-pedrizite in der 2012 Amphibol Nomenklatur.

Chemism

Chemical formula

NaLi2(Fe2+2Fe3+2Li)Si8O22(OH)2

Chemical composition

Eisen, Lithium, Natrium, Silicium, Sauerstoff, Wasserstoff

Unit weight: 877.8806242 u; Number of atoms in the formula: 42

Info

Empirical formula:

NaLi2(Fe2Fe2Li)Si8O22(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.23

2

4.76

1.0079470

2.0158940

Lithium

Li

2.37

3

7.14

6.9412000

20.8236000

Oxygen

O

43.74

24

57.14

15.9994300

383.9863200

Sodium

Na

2.62

1

2.38

22.9897702

22.9897702

Silicon

Si

25.59

8

19.05

28.0855300

224.6842400

Iron

Fe

25.45

4

9.52

55.8452000

223.3808000

Strunz 9th edition incl. updates

9.DE.25

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
E: Ketten- und Bandsilikate mit 2-periodischen Doppelketten, Si4O11; Amphibol-Familie, Klinoamphibole
25:Amphibole: Alkali

Lapis Classification

VIII/F.08-095

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

Classification by Hölzel

9.DF.410

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

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Amphibole supergroup  ⇒ (OH,F,Cl)-dominant amphiboles  ⇒ Lithium amphiboles  ⇒ Pedrizite (Ped) amphiboles

Optical Properties

Color

schwarz

Streak color

grau

Lustre

Glasglanz

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

B2/m

Cell parameters a (Å)

9.496

Cell parameters b (Å)

17.883

Cell parameters c (Å)

5.297

Cell parameters a/b or c/a

0.531

Cell parameters c/b

0.296

Cell parameters α

90°

Cell parameters β

102.06°

Cell parameters γ

90°

Z

2

Volumne (ų)

879.667

X-Ray Powder Diffraction

8.24 (100),
4.471(30),
3.563 (20),
3.416(40),
3.05 (60),
2.714 (70),
2.494(40),
2.164(20)

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

6

Density (g/cm³)

3.24 (berechnet)

3.314 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen {110}

Fracture

unregelmäßig, uneben

Tenacity

spröde

Preface

Author (Name, Year)

Oberti, Cámara, Caballero, Ottolini (2003)

References

Oberti R, Cámara, Caballero J M, Ottolini L (2003) Sodic-ferri-ferropedrizite and ferri-clinoferroholmquistite: Mineral data and degree of order of the Α-site cations in Li-rich amphiboles, The Canadian Mineralogist 41, 1345-1354

Leake B E, Woolley A R, Birch W D, Burke E A J, Ferraris G, Grice J D, Hawthorne F C, Kisch H J, Krivovichev V G, Schumacher J C, Stephenson N C N, Whittaker E J W (2003) Nomenclature of amphiboles: additions and revisions to the International Mineralogical Association’s 1997 recommendations, The Canadian Mineralogist 41, 1355-1362

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

IMA group assignments

Other languages

German

Ferro-Ferri-Pedrizit

English

Ferro-ferri-pedrizite

Russian

Ферроферрипедрицит

Traditional Chinese

高鐵鈉鐵鋰閃石

Simplified Chinese

高铁钠铁锂闪石

old name

German

Natrium-Ferro-Ferripedrizit (2003, Oberti)

English

Sodic-ferro-ferripedrizite (2003, Oberti)

Alternative Name

German

Ferro-Ferripedrizit

Lapis-Mineralienverzeichnis

CNMNC (IMA)-Number

IMA 2001-068

CNMNC symbol

Symbol

Ffpd