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

Ferro-sadanagaite

Collectors Summary

Color dunkelbraun
Lustre Glasglanz
Hardness (Mohs) 6
Crystal System monoklin, C2/m

Additional information / Summary

Von Sadanagait vom Amphibol-Subkomitte 1997 zu Potassicsadanagaite umbenannt. In 2012 vom Amphibol-Subkomitte neu zu Ferro-Sadanagait umbenannt.

Chemism

Chemical formula

NaCa2(Fe2+3Al2)(Si5Al3)O22(OH)2

Chemical composition

Aluminium, Calcium, Eisen, Natrium, Silicium, Sauerstoff, Wasserstoff

Unit weight: 932.0197252 u; Number of atoms in the formula: 42

Info

Empirical formula:

NaCa2(Fe3Al2)(Si5Al3)O22(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.22

2

4.76

1.0079470

2.0158940

Oxygen

O

41.20

24

57.14

15.9994300

383.9863200

Sodium

Na

2.47

1

2.38

22.9897702

22.9897702

Aluminium

Al

14.47

5

11.90

26.9815382

134.9076910

Silicon

Si

15.07

5

11.90

28.0855300

140.4276500

Calcium

Ca

8.60

2

4.76

40.0784000

80.1568000

Iron

Fe

17.98

3

7.14

55.8452000

167.5356000

Strunz 9th edition incl. updates

9.DE.15

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

Lapis Classification

VIII/F.10-200

VIII: SILIKATE
F: Ketten- und Bandsilikate
10: Zweierbänder [Si4O11] 6-; Amphibol-Gruppe; Ca2-Amphibole

Classification by Hölzel

9.DH.620

9: SILICATES
D: Inosilicates; ~[Si2O6]4--...2-Chain
H: Amphiboles; Calcic Amphiboles
6: Sadanagaite-Group

IMA status

zahlreiche Namensänderungen anerkannt

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Amphibole supergroup  ⇒ (OH,F,Cl)-dominant amphiboles  ⇒ Calcium amphiboles  ⇒ Sadanagaite (Sad) amphiboles

Optical Properties

Color

dunkelbraun

Lustre

Glasglanz

max. Birefringence

0.024

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

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

1.673

RI value β

1.684

RI value γ / ε

1.697

Ri mean

1.685

2V angle

Biaxial (+) 90° (gemessen) 86° (berechnet)

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell parameters a (Å)

9.922

Cell parameters b (Å)

18.03

Cell parameters c (Å)

5.352

Cell parameters a/b or c/a

0.550

Cell parameters c/b

0.297

Cell parameters α

90°

Cell parameters β

105.30

Cell parameters γ

90°

Z

2

Volume (ų)

923.505

Physical Properties

Hardness (Mohs)

6

VHN (Hardness Vickers)

730 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.30 (berechnet)

3.351 ( ρ calc. Mineralienatlas )

Preface

Author (Name, Year)

Banno & Miyawaki & Matsubara & Makino & Bunno & Yamada & Kamiya, 2004

References

American Mineralogist 69 (1984), 465.

European Journal of Mineralogy 16 (2004), 177.

IMA group assignments

Other languages

German

Ferro-Sadanagait

English

Ferro-sadanagaite

old name

German

Kalium-Sadanagait (1997)

English

Potassic-sadanagaite (1997)

English

Potassicsadanagaite (1997)

English

Sadanagaite (1984)

Locations with GPS information

IDs

GUSID (Global unique identifier short form) Dtzpv9y71EW3RPy-PD2oIQ
GUID (Global unique identifier) BFE9DC0E-BBDC-45D4-B744-FCBE3C3DA821
Database ID 1859