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You find additional specimen at the Geolitho Museum

Collectors Summary

Color gelblich, gelblich weiß, weiß, hellgrün, hellgrün weiß
Streak color weiß
Hardness (Mohs) 2.5
Solubility +++ H2O, stabil von Fe0.95Cu0.05 bis Fe0.5Cu0.5 an der Luft beinormalen Temperaturen und Luftfeuchte
Crystal System triklin, P1

Chemism

Chemical formula

Fe(SO4)·5H2O

Chemical composition

Eisen, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 241.98504 u; Number of atoms in the formula: 21

Info

Empirical formula:

Fe(SO4)·5H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

4.17

10

47.62

1.0079470

10.0794700

Oxygen

O

59.51

9

42.86

15.9994300

143.9948700

Sulfur

S

13.25

1

4.76

32.0655000

32.0655000

Iron

Fe

23.08

1

4.76

55.8452000

55.8452000

Strunz 9th edition incl. updates

7.CB.20

7: Sulfate (Selenate, Tellurate, Chromate, Molybdate, Wolframate)
C: Sulfate (Selenate, etc.) ohne weitere Anionen, mit H2O
B: Mit ausschließlich mittelgroßen Kationen
20:Pentahydrit-Gruppe

Lapis Classification

VI/C.04-020

VI: SULFATE, CHROMATE, MOLYBDATE UND WOLFRAMATE
C: Wasserhaltige Sulfate, ohne fremde Anionen
4: Mittelgroße Kationen; Chalkanthit-Gruppe

Classification by Hölzel

7.CB.230

7: SULFATES CHROMATES MOLYBDATES WOLFRAMATES
C: Sulfates (-Anions +Water)
B: Vitriol-Group, Mg,Fe,Co,Ni,Mn,Cu,Zn-Sulfates with 4 to 7 Water
2: Pentahydrite-Group

Dana 8th edition

29.06.07.02

29: Hydrated Acid and Sulfates
06: Hydrated Acid and Sulfates where A XO4 · x(H2O)
07: Chalchanthite Group (Triclinic: P-1)

IMA status

Neudefinition von der CNMNC anerkannt

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Chalcanthit group

Optical Properties

Color

gelblich, gelblich weiß, weiß, hellgrün, hellgrün weiß

Streak color

weiß

Diaphaneity (Transparency)

transparent bis durchscheinend

max. Birefringence

0.021

Birefringence chart\! Siderotil title=Birefringence chart Siderotil

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

1.514

RI value β

1.526

RI value γ / ε

1.535

Ri mean

1.525

2V angle

Biaxial (-) 55°

Crystallography

Crystal System

triklin

Class (H-M)

1

Space Group number

2

Space Group

P1

Cell parameters a (Å)

6.292

Cell parameters b (Å)

10.632

Cell parameters c (Å)

6.072

Cell parameters a/b or c/a

0.592

Cell parameters c/b

0.571

Cell parameters α

82.63

Cell parameters β

110.2

Cell parameters γ

105.18

Z

2

Volume (ų)

367.589

X-Ray Powder Diffraction

5.73(50),
5.57(60),
4.89(100),
3.90(30),
3.73(80),
3.21(40),
2.92(40),
2.68(40)

XRD chart Siderotil

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

2.5

Density (g/cm³)

2.1 - 2.2 / Durchschnittlich = 2.15

2.186 ( ρ calc. Mineralienatlas )

Instability

+++ H2O, stabil von Fe0.95Cu0.05 bis Fe0.5Cu0.5 an der Luft beinormalen Temperaturen und Luftfeuchte

(Co-)Type locality

(Co-)Type locality

Slowenien/Idrija (Idria)/Idria Mine

Preface

Author (Name, Year)

Schrauf, 1891

References

Handbook of Mineralogy (Anthony et al.), 5 (2003), 646

CNMNC Newsletter No. 50; Mineralogical Magazine, 31 [Formel]

IMA group assignments

Other languages

German

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English

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French

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Spanish

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Russian

Сидеротил

Simplified Chinese

铁矾

Alternative Name

French

Siderotile

German

Siderotyl

CNMNC symbol

Symbol

Sdt

Locations with GPS information

IDs

GUSID (Global unique identifier short form) ztBualZ380iZpWY-IxeLtg
GUID (Global unique identifier) 6A6ED0CE-7756-48F3-99A5-663E23178BB6
Database ID 3518