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Ferdowsiite

Pictures (2 Images total)

Ferdowsiit
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Ferdowsiit

Uchucchaqua Mine, Lima, Peru. BB 1,0mm.

Collection: Mabu
Copyright: Mabu
Contribution: Mabu 2017-04-15
Locality: Uchucchacua Mine / Oyon, Provinz / Lima, Region / Peru
Ferdowsiit xx
Views (Image: 1479573325): 327
Ferdowsiit xx

mit Arsiccioit; eventuell die besten xx von dem Mineral !; Monte Arsiccio Mine, Italien; Bildbreite ca 3mm

Collection: loismin
Copyright: loismin
Contribution: loismin 2016-11-19
Locality: Miniera di Monte Arsiccio / Sant'Anna di Stazzema / Stazzema / Apuanische Alpen / Lucca, Provinz / Toskana (Toscana) / Italien

Collectors Summary

Color grauschwarz
Streak color dunkelgrau
Lustre Metallglanz
Hardness (Mohs) verm. 2.5 - 3
Cleavages keine
Fracture uneben
Crystal System monoklin, P21/n
Morphology nadelig; auch symplektitisch

Chemism

Chemical formula

Ag8(Sb5As3)S16

Empirical formula (analysis)

Ag7.97Pb0.08Sb4.75As3.15Bi0.01S16.04

Chemical composition

Antimon, Arsen, Silber, Schwefel

Unit weight: 2207.07045852 u; Number of atoms in the formula: 32

Info

Empirical formula:

Ag7.97Pb0.08Sb4.75As3.15Bi0.01S16.04

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Sulfur

S

23.30

16.04

50.13

32.0655000

514.3306200

Arsenic

As

10.69

3.15

9.84

74.9216020

236.0030463

Silver

Ag

38.95

7.97

24.91

107.8682200

859.7097134

Antimony

Sb

26.20

4.75

14.84

121.7601000

578.3604750

Lead

Pb

0.75

0.08

0.25

207.2100000

16.5768000

Bismuth

Bi

0.09

0.01

0.03

208.9803820

2.0898038

Analysis wt%

Ag : 38.81, Pb : 0.76, Sb : 26.06, As : 10.64, Bi : 0.11, S : 23.21; WDX (Makovicky et al. 2013)

IMA status

anerkannt - Neue Mineralien Feb. 2013; CNMNC Newsletter No. 15

Mineral status

anerkanntes Mineral

Optical Properties

Color

grauschwarz

Streak color

dunkelgrau

Change in color

in Reflexion grauweiß

Diaphaneity (Transparency)

opak

Lustre

Metallglanz

Pleochroism

schwach von weiß nach grau

Bireflectance

schwach

Anisotropism

schwach in Luft, stärker in Öl; keine Innenreflexe

Reflectivity: (Lambda nm) ↓, ↑, Ø

(470) 34.90, 37.30, 36.10
(546) 33.40, 35.90, 34.65
(589) 32.40, 35.10, 33.75
(650) 30.70, 33.50, 32.10

Reflection chart Ferdowsiite

Reflectivity Ø

34.15

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/n

Cell parameters a (Å)

8.677

Cell parameters b (Å)

5.799

Cell parameters c (Å)

13.839

Cell parameters a/b or c/a

1.496

Cell parameters c/b

2.386

Cell parameters α

90°

Cell parameters β

96.175°

Cell parameters γ

90°

Z

1

Volumne (ų)

692.31

Kristall structure

Superstruktur von PbS, Struktur bestimmt

X-Ray Powder Diffraction

3.225(96), 3.205(100), 2.900(78), 2.750(90), 2.707(73), 1.998(41), 1.979(39), 1.940(22)

XRD chart Ferdowsiite

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

Morphology

nadelig; auch symplektitisch

Physical Properties

Hardness (Mohs)

verm. 2.5 - 3

Density (g/cm³)

5.3 (berechnet)

5.293 ( ρ calc. Mineralienatlas )

Cleavages

keine

Fracture

uneben

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

Iran/West-Aserbaidschan, Provinz/Sardasht/Barika Erzlagerstätte

Type material

Department of Materials Engineering and Physics, University of Salzburg, Salzburg, Austria

Natural History Museum-Vienna, Austria

Collection number of type material

15006 (Salzburg); N 9604 (Wien)

Preface

Name from

Ferdowsi Tousi (935 - 1020), persischer Dichter

Author (Name, Year)

Dan Topa, Emil Makovicky, Hubert Putz, Georg Zagler und Husein Tajjedin (2013)

References

Topa, D., Makovicky, E., Putz, H., Zagler, G. and Tajjedin, H. (2013) Ferdowsiite, IMA 2012-062. CNMNC Newsletter No. 15, February 2013, page 9; Mineralogical Magazine, 77, 112.

Makovicky, E., Topa, D., Tajeddin, Putz, H., Zagler, G. (2013) Ferdowsiite: A new mineral from the Barika ore deposit, Iran. The Canadian Mineralogist, 51, 727 - 734

Other languages

German

Ferdowsiit

English

Ferdowsiite

Russian

Фирдоусиит

IMA Number

IMA 2012-062

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

German pages

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

English pages

Mindat - search for: Ferdowsiite
Webmineral - search for:Ferdowsiite
Handbook-of-Mineralogy - search for: Ferdowsiite
RRUFF - Raman, XRD and other mineral data - search for: Ferdowsiite
RRUFF - References and PDF downloads - search for: Ferdowsiite
American-Mineralogist-Crystal-Structure-Database - search for: Ferdowsiite
Athena - search for: Ferdowsiite

Russian pages

Webmineral.ru - search for: Фирдоусиит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Ferdowsiit
Crystal-Treasure.com - search for: Ferdowsiit
Bosse - search for: Ferdowsiit

Locations with GPS information




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