https://www.mineral-bosse.de
https://www.mineraliengrosshandel.com
https://www.edelsteine-neuburg.de
https://www.mineralbox.biz
'._('einklappen').'
 

Ferro-holmquistite

Collectors Summary

Color blauschwarz
Hardness (Mohs) 5.00 - 6.00
Crystal System orthorhombisch, Pnma

Chemism

Chem­ical formula

☐Li2(Fe2+3Al2)(Si8O22)(OH)2

Addi­tional chem. informa­tion

Amphibol Gruppe

Chem­ical com­po­si­tion

Aluminium, Eisen, Lithium, Silicium, Sauerstoff, Wasserstoff, Vakanz

Unit weight: 846.06753041 u; Number of atoms in the formula: 42

Info

Empirical formula:

VcLi2(Fe3Al2)(Si8O22)(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Vacancy

Vc

0.00

1

2.38

0.0000000

0.0000000

Hydrogen

H

0.24

2

4.76

1.0079470

2.0158940

Lithium

Li

1.64

2

4.76

6.9412000

13.8824000

Oxygen

O

45.38

24

57.14

15.9994300

383.9863200

Aluminium

Al

6.38

2

4.76

26.9815382

53.9630764

Silicon

Si

26.56

8

19.05

28.0855300

224.6842400

Iron

Fe

19.80

3

7.14

55.8452000

167.5356000

Anal­y­sis wt%

SiO2 : 59.37, Al2O3 : 11.86, FeO : 15.14, MgO : 7.32, Li2O : 3.46, H2O : 2.19 (Ref: American Mineralogist 2005)

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.12-030

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

Clas­sifica­tion by Hölzel

9.DF.320

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

Dana 8th edi­tion

66.01.02.11

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 2004

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Classification

Amphibole supergroup  ⇒ (OH,F,Cl)-dominant amphiboles  ⇒ Lithium amphiboles  ⇒ Holmquistite (Hol) amphiboles

Optical Properties

Color

blauschwarz

max. Birefrin­gence

0.023

Birefringence chart\! Ferro-holmquistite title=Birefringence chart Ferro-holmquistite

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

1.628

RI value β

1.646

RI value γ / ε

1.651

Ri mean

1.642

2V angle

Biaxial (-) 55°

Crystallography

Crystal Sys­tem

orthorhombisch

Class (H-M)

mmm

Space Group number

62

Space Group

Pnma

Cell param­e­ters a (Å)

18.279

Cell param­e­ters b (Å)

17.670

Cell param­e­ters c (Å)

5.273

Cell param­e­ters a/b or c/a

1.034

Cell param­e­ters c/b

0.298

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

1703.126

X-Ray Pow­der Diffrac­tion

7.76(100), 5.77(60), 4.42(30), 4.37(30), 3.87(60), 3.43(70), 3.14(80), 2.038(40)

XRD chart Ferro-holmquistite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

5.00 - 6.00

VHN (Hard­ness Vick­ers)

530 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.145 (berechnet)

3.299 ( ρ calc. Mineralienatlas )

Preface

Author (Name, Year)

Cámara & Oberti, 2005

References

American Mineralogist 90 (2005), 1167

IMA group assignments

Other languages

German

Ferro-Holmquistit

English

Ferro-holmquistite

Spanish

Ferroholmquistita

French

Ferroholmquistite

Russian

Феррохолмквистит

Japanese

鉄リシア閃石

old name

German

Ferroholmquistit (pre 2012)

English

Ferroholmquistite (pre 2012)

CNMNC (IMA)-Number

IMA 2004-030

CNMNC symbol

Symbol

Fhlm

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

German pages

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

English pages

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

Russian pages

Webmineral.ru - search for: Феррохолмквистит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Ferro-Holmquistit
Crystal-Treasure.com - search for: Ferro-Holmquistit
Bosse - search for: Ferro-Holmquistit
Edelsteine Neuburg - Gundolf Fischer - search for: Ferro-Holmquistit
Geolitho marketplace, by and for collectors - search for: Ferro-Holmquistit

Locations with GPS information