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Ungemachite

Collectors Summary

Color farblos
Hardness (Mohs) 2.5
Solubility +++ Säuren
Crystal System trigonal, R3

Chemism

Chem­ical formula

K3Na8Fe3+(SO4)6(NO3)2·6H2O

Chem­ical com­po­si­tion

Eisen, Natrium, Kalium, Sauerstoff, Schwefel, Stickstoff, Wasserstoff

Unit weight: 1165.5395756 u; Number of atoms in the formula: 68

Info

Empirical formula:

K3Na8Fe(SO4)6(NO3)2·6H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

1.04

12

17.65

1.0079470

12.0953640

Nitrogen

N

2.40

2

2.94

14.0067200

28.0134400

Oxygen

O

49.42

36

52.94

15.9994300

575.9794800

Sodium

Na

15.78

8

11.76

22.9897702

183.9181616

Sulfur

S

16.51

6

8.82

32.0655000

192.3930000

Potassium

K

10.06

3

4.41

39.0983100

117.2949300

Iron

Fe

4.79

1

1.47

55.8452000

55.8452000

Anal­y­sis wt%

K2O : 12.12, Na2O : 21.27, Fe2O3 : 6.85, N2O5 : 9.27, SO3 : 41.21, H2O : 9.27 (Ref: berechnet)

Strunz 9th edi­tion incl. updates

7.DG.10

7: Sulfate (Selenate, Tellurate, Chromate, Molybdate, Wolframate)
D: Sulfate (Selenate, etc.) mit weitere Anionen, mit H2O
G: Mit großen bis mittelgroßen Kationen; mit NO3, CO3, B(OH)4, SiO4 oder IO3
10:Ungemachit-Gruppe

Lapis Clas­sifica­tion

VI/D.16-020

VI: SULFATE, CHROMATE, MOLYBDATE UND WOLFRAMATE
D: Wasserhaltige Sulfate, mit fremden Anionen
16: Mittelgroße und sehr große Kationen

Clas­sifica­tion by Hölzel

7.DO.120

7: SULFATES CHROMATES MOLYBDATES WOLFRAMATES
D: Sulfates (+Anions +Water)
O: With other complex Anions

Dana 8th edi­tion

32.02.03.01

32: Compound Sulfates
02: Compound Sulfates (hydrous) with simple bi-anionic formula

IMA sta­tus

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

farblos

max. Birefrin­gence

0.051

Birefringence chart\! Ungemachite title=Birefringence chart Ungemachite

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

1.502

RI value γ / ε

1.449

Ri mean

1.484

2V angle

Uniaxial (-)

Crystallography

Crystal Sys­tem

trigonal

Class (H-M)

3

Space Group number

148

Space Group

R3

Cell param­e­ters a (Å)

10.896

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

24.989

Cell param­e­ters a/b or c/a

2.293

Cell param­e­ters c/b

-

Z

3

Volumne (ų)

2569.293

X-Ray Pow­der Diffrac­tion

8.82(30),
8.33(60),
7.55(30),
3.43(100),
2.96(20),
2.72(50),
2.59(30),
1.880(20)

XRD chart Ungemachite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

2.5

VHN (Hard­ness Vick­ers)

53 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.287 (gemessen)

2.26 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ Säuren

Preface

Author (Name, Year)

Peacock & Bandy, 1936

References

Handbook of Mineralogy (Anthony et al.), 5 (2003), 724

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

Ungemachite

K3Na8Fe3+(SO4)6(NO3)2·6H2O

trigonal : 3 : R3

7.DG.10

Humberstonite

K3Na7Mg2(SO4)6(NO3)2·6H2O

trigonal : 3 : R3

7.DG.10

'Clinoungemachite'

K3Na9Fe3+[(OH)3|(SO4)6]·9H2O

7.DG.10

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

Darapskite

Na3(SO4)(NO3)·H2O

monoklin : 2/m : P21/m

VI/D.16-010

Witzkeite

Na4K4Ca(NO3)2(SO4)4·2H2O

monoklin : m : Cc

VI/D.16-015

Ungemachite

K3Na8Fe3+(SO4)6(NO3)2·6H2O

trigonal : 3 : R3

VI/D.16-020

'Clinoungemachite'

K3Na9Fe3+[(OH)3|(SO4)6]·9H2O

VI/D.16-030

Humberstonite

K3Na7Mg2(SO4)6(NO3)2·6H2O

trigonal : 3 : R3

VI/D.16-040

Fuenzalidaite

K3(Na,K)2Na3Mg5(IO3)6(SO4)6·6H2O

trigonal : 3m : P3c1

VI/D.16-050

Carlosruizite

K3(Na,K)2Na3Mg5(IO3)6(SeO4,SO4,CrO4)6·6H2O

trigonal : 3m : P3c1

VI/D.16-060

George-ericksenite

Na6CaMg[(IO3)6|(CrO4,SO4)2]·12H2O

monoklin : 2/m : C2/c

VI/D.16-070

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

Darapskite

Na3(SO4)(NO3)·H2O

monoklin : 2/m : P21/m

7.DO.100

Witzkeite

Na4K4Ca(NO3)2(SO4)4·2H2O

monoklin : m : Cc

7.DO.110

Ungemachite

K3Na8Fe3+(SO4)6(NO3)2·6H2O

trigonal : 3 : R3

7.DO.120

Humberstonite

K3Na7Mg2(SO4)6(NO3)2·6H2O

trigonal : 3 : R3

7.DO.130

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Rapidcreekite

Ca2(SO4)(CO3)·4H2O

orthorhombisch : mmm : Pcnb

32.02.01.01

Humberstonite

K3Na7Mg2(SO4)6(NO3)2·6H2O

trigonal : 3 : R3

32.02.02.01

Ungemachite

K3Na8Fe3+(SO4)6(NO3)2·6H2O

trigonal : 3 : R3

32.02.03.01

Other languages

German

Ungemachit

Spanish

Ungemachita

English

Ungemachite

French

Ungemachite

Russian

Унгемахит

Simplified Chinese

菱碱铁矾

CNMNC symbol

Symbol

Ugm

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

German pages

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

English pages

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RRUFF - References and PDF downloads - search for: Ungemachite
American-Mineralogist-Crystal-Structure-Database - search for: Ungemachite
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Russian pages

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German pages

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