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Pyracmonite

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Pyracmonit
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Pyracmonit

Grauer Pyracmonit neben anderen Sulfaten. Fundort: Königin Carola Schacht, Freital, Sachsen, Deutschland. Bildbreite: ca. 4 mm.

Collection: raritätenjäger
Copyright: raritätenjäger
Contribution: raritätenjäger 2012-06-18
Locality: Königin Carolaschacht / Freital / Sächsische Schweiz-Osterzgebirge, Landkreis / Sachsen / Deutschland

Collectors Summary

Color farblos bis weiß
Streak color weiß
Lustre Glasglanz
Solubility nicht hygroskopisch und stabil an der Luft
Crystal System trigonal, R3c

Chemism

Chem­ical formula

(NH4)3Fe(SO4)3

Chem­ical com­po­si­tion

Eisen, Sauerstoff, Schwefel, Stickstoff, Wasserstoff

Unit weight: 398.150384 u; Number of atoms in the formula: 31

Info

Empirical formula:

(NH4)3Fe(SO4)3

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

3.04

12

38.71

1.0079470

12.0953640

Nitrogen

N

10.55

3

9.68

14.0067200

42.0201600

Oxygen

O

48.22

12

38.71

15.9994300

191.9931600

Sulfur

S

24.16

3

9.68

32.0655000

96.1965000

Iron

Fe

14.03

1

3.23

55.8452000

55.8452000

Strunz 9th edi­tion incl. updates

7.AC.

7: Sulfate (Selenate, Tellurate, Chromate, Molybdate, Wolframate)
A: Sulfate (Selenate, etc.) ohne weitere Anionen, ohne H2O
C: Mit mittelgroßen und großen Kationen

Lapis Clas­sifica­tion

VI/A.05-030

VI: SULFATE, CHROMATE, MOLYBDATE UND WOLFRAMATE
A: Wasserfreie Sulfate [SO4] 2-, ohne fremde Anionen
5: Mittelgroße und sehr große Kationen

Clas­sifica­tion by Hölzel

7.AB.340

7: SULFATES CHROMATES MOLYBDATES WOLFRAMATES
A: Sulfates (-Anions -Water)
B: Sulfates, C medium + large

IMA sta­tus

anerkannt - IMA WEB Seite - Neue Mineralien Sept. 2008

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

farblos bis weiß

Streak color

weiß

Lus­tre

Glasglanz

RI value α / ω / n

1.562

RI value β

av.

Ri mean

1.562

2V angle

Uniaxial

Crystallography

Crystal Sys­tem

trigonal

Class (H-M)

3m

Space Group number

161

Space Group

R3c

Cell param­e­ters a (Å)

15.217

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

8.932

Cell param­e­ters a/b or c/a

0.587

Cell param­e­ters c/b

-

Z

6

Volumne (ų)

1791.173

Kristall struc­ture

aufgeklärt, siehe Erstbeschreibung

X-Ray Pow­der Diffrac­tion

7.596(100), 4.384(5), 4.358(23), 4.247(5), 3.371(26), 3.320(30), 2.863(8), 2.829(14)

XRD chart Pyracmonite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

2.22(1) gem.. 2.228 ber.

2.215 ( ρ calc. Mineralienatlas )

Insta­bil­ity

nicht hygroskopisch und stabil an der Luft

Preface

Name from

Pyrakmon grch. = Feuer und Amboss, einer der Zyklopen, der dem Gott Vulcano als Schmiedeknecht diente

Author (Name, Year)

Francesco Demartin et al., 2010

References

Francesco Demartin, Carlo Maria Gramaccioli, Italo Campostrini: PYRACMONITE, (NH4)3Fe(SO4)3, A NEW AMMONIUM IRON SULFATE FROM LA FOSSA CRATER, VULCANO, AEOLIAN ISLANDS, ITALY. Can Mineral 48 (2010) S. 307-313.

IMA WEB Seite - Neue Mineralien Sept. 2008

Ciriotti, M.E., Fascio, L. & Pasero, M. (2009): Italian Type Minerals. Edizioni Plus, Università di Pisa, Pisa, Italy, 357 pp.
Mineralien Welt 01/11, Neue Mineralien, Steffen Jahn

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Bubnovaite

K2Na8Ca(SO4)6

trigonal : 3m : P31c

7.AC.

Acmonidesite

(NH4,K,Pb)8NaFe2+4(SO4)5Cl8

orthorhombisch : 222 : C2221

7.AC.

Pyracmonite

(NH4)3Fe(SO4)3

trigonal : 3m : R3c

7.AC.

Dobrovolskyite

Na4Ca(SO4)3

trigonal : 3 : R3

7.AC.

Aluminopyracmonite

(NH4)3Al(SO4)3

trigonal : 3 : R3

7.AC.

Vanthoffite

Na6Mg(SO4)4

monoklin : 2/m : P21/c

7.AC.05

Efremovite

(NH4)2Mg2(SO4)3

kubisch : 23 : P213

7.AC.10

Langbeinite

K2Mg2(SO4)3

kubisch : 23 : P213

7.AC.10

Ferroefremovite

(NH4)2Fe2+2(SO4)3

kubisch : 23 : P213

7.AC.10

Calciolangbeinite

K2Ca2(SO4)3

kubisch : 23 : P213

7.AC.10

Manganolangbeinite

K2Mn2(SO4)3

kubisch : 23 : P213

7.AC.10

Eldfellite

NaFe(SO4)2

monoklin : 2/m : C2/m

7.AC.15

Yavapaiite

KFe3+(SO4)2

monoklin : 2/m : C2/m

7.AC.15

Markhininite

TlBi(SO4)2

triklin : 1 : P1

7.AC.15

Sabieite

(NH4)Fe3+(SO4)2

trigonal : 32 : P321

7.AC.20

Steklite

KAl(SO4)2

trigonal : 32 : P321

7.AC.20

Godovikovite

(NH4)(Al,Fe3+)(SO4)2

trigonal : 32 : P321

7.AC.20

Thénardite

Na2SO4

orthorhombisch : mmm : Fddd

7.AC.25

Metathénardite

Na2SO4

hexagonal : 6/mmm : P63/mmc

7.AC.30

Möhnite

(NH4)K2Na(SO4)2

trigonal : 3m : P3m1

7.AC.35

Aphthitalite

(K,Na)3Na(SO4)2

trigonal : 3m : P3m1

7.AC.35

Belomarinaite

KNa(SO4)

trigonal : 3m : P3m1

7.AC.35

Natroaphthitalite

KNa3(SO4)2

trigonal : 3m : P3m1

7.AC.35

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Steklite

KAl(SO4)2

trigonal : 32 : P321

VI/A.05-005

Godovikovite

(NH4)(Al,Fe3+)(SO4)2

trigonal : 32 : P321

VI/A.05-010

Sabieite

(NH4)Fe3+(SO4)2

trigonal : 32 : P321

VI/A.05-020

Aluminopyracmonite

(NH4)3Al(SO4)3

trigonal : 3 : R3

VI/A.05-025

Pyracmonite

(NH4)3Fe(SO4)3

trigonal : 3m : R3c

VI/A.05-030

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Yavapaiite

KFe3+(SO4)2

monoklin : 2/m : C2/m

7.AB.300

Sabieite

(NH4)Fe3+(SO4)2

trigonal : 32 : P321

7.AB.310

Godovikovite

(NH4)(Al,Fe3+)(SO4)2

trigonal : 32 : P321

7.AB.320

Steklite

KAl(SO4)2

trigonal : 32 : P321

7.AB.330

Pyracmonite

(NH4)3Fe(SO4)3

trigonal : 3m : R3c

7.AB.340

CNMNC (IMA)-Number

IMA 2008-029

CNMNC symbol

Symbol

Pyr

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

German pages

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

English pages

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

German pages

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Locations with GPS information