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Amarillite

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Amarillit
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Amarillit (SNr: A000495)

Weiße faserige Kristalle schichtweise mit gelbgrünen Botryogen, überwachsen von weißen Ausblühungen, BB = 6 mm; Fundort: Cerros Los Pintados, Provinz Iquique, I. Region (Tarapacá), Chile.
Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2015-11-27
Locality: Cerros Los Pintados / Iquique, Provinz / Tarapacá, Region (I. Region) / Chile

Collectors Summary

Color grünlich-gelb, gelb
Streak color weiß
Lustre Glasglanz, Diamantglanz
Hardness (Mohs) 2.5 - 3
Solubility +++ H2O
Crystal System monoklin, C2/c

Chemism

Chem­ical formula

NaFe3+(SO4)2·6H2O

Chem­ical com­po­si­tion

Eisen, Natrium, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 379.0533542 u; Number of atoms in the formula: 30

Info

Empirical formula:

NaFe(SO4)2·6H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

3.19

12

40.00

1.0079470

12.0953640
Oxygen

O

59.09

14

46.67

15.9994300

223.9920200
Sodium

Na

6.07

1

3.33

22.9897702

22.9897702
Sulfur

S

16.92

2

6.67

32.0655000

64.1310000
Iron

Fe

14.73

1

3.33

55.8452000

55.8452000

Anal­y­sis wt%

Na2O : 7.14, Fe2O3 : 21.39, SO3 : 43.59, H2O : 28.45 (Ref: Bulletin de Mineralogie 35)

Strunz 9th edi­tion incl. updates

7.CC.10

7: Sulfate (Selenate, Tellurate, Chromate, Molybdate, Wolframate)
C: Sulfate (Selenate, etc.) ohne weitere Anionen, mit H2O
C: Mit mittelgroßen und großen [Kationen]
10:Tamarugit-Gruppe

Lapis Clas­sifica­tion

VI/C.15-030

VI: SULFATE, CHROMATE, MOLYBDATE UND WOLFRAMATE
C: Wasserhaltige Sulfate, ohne fremde Anionen
15: Mittelgroße und sehr große Kationen

Clas­sifica­tion by Hölzel

7.CD.370

7: SULFATES CHROMATES MOLYBDATES WOLFRAMATES
C: Sulfates (-Anions +Water)
D: Sulfates, C medium + large
3: Picromerite-Group

Dana 8th edi­tion

29.05.03.02

29: Hydrated Acid and Sulfates
05: Hydrated Acid and Sulfates where A B (XO4)2 · x(H2O)

IMA sta­tus

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

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

grünlich-gelb, gelb

Streak color

weiß

Lus­tre

Glasglanz, Diamantglanz

max. Birefrin­gence

0.059
Birefringence chart\! Amarillite title=Birefringence chart Amarillite

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

1.532

RI value β

1.555

RI value γ / ε

1.591

Ri mean

1.559

2V angle

Biaxial (+) 80°

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

15

Space Group

C2/c

Cell param­e­ters a (Å)

8.419

Cell param­e­ters b (Å)

10.841

Cell param­e­ters c (Å)

12.472

Cell param­e­ters a/b or c/a

0.777

Cell param­e­ters c/b

1.150

Cell param­e­ters α

90°

Cell param­e­ters β

95.50

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

1133.084

Kristall struc­ture

Zhuming Yang, Gerald Giester: Hydrogen-bonding system in amarillite, NaFe(SO4)2(H2O)6: the structure refinement. Eur J Mineral Vol. 28 No. 5 (2016) S. 953-958.

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

2.5 - 3

VHN (Hard­ness Vick­ers)

68 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.19

2.222 ( ρ calc. Mineralienatlas )

Radioac­tiv­ity

keine

Insta­bil­ity

+++ H2O

(Co-)Type locality

(Co-)Type locality

Chile/Atacama, Region (III. Region)/Copiapó, Provinz/Tierra Amarilla

Preface

Author (Name, Year)

Ungemach, 1933

References

Handbook of Mineralogy (Anthony et al.), 5 (2003), 16

ZHUMING YANG; GERALD GIESTER - Hydrogen-bonding system in amarillite, NaFe(SO4)2(H2O)6: the structure refinement - E. Schweizerbart'sche Verlagsbuchhandlung [Appeared or available online: 14. Juni 2016]

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

Amarillite

NaFe3+(SO4)2·6H2O

monoklin : 2/m : C2/c

7.CC.10

Tamarugite

NaAl(SO4)2·6H2O

monoklin : 2/m : P21/a

7.CC.10

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

Krausite

KFe3+(SO4)2·H2O

monoklin : 2/m : P21/m

VI/C.15-010

Tamarugite

NaAl(SO4)2·6H2O

monoklin : 2/m : P21/a

VI/C.15-020

Amarillite

NaFe3+(SO4)2·6H2O

monoklin : 2/m : C2/c

VI/C.15-030

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

Picromerite

K2Mg(SO4)2·6H2O

monoklin : 2/m : P21/a

7.CD.300

Boussingaultite

(NH4)2Mg(SO4)2·6H2O

monoklin : 2/m : P21/a

7.CD.310

Cyanochroite

K2Cu(SO4)·6H2O

monoklin : 2/m : P21/c

7.CD.320

Mohrite

(NH4)2Fe2+(SO4)2·6H2O

monoklin : 2/m : P21/a

7.CD.330

'Nickelboussingaultite'

(NH4)2(Ni,Mg)(SO4)2·6H2O

7.CD.340

Amarillite

NaFe3+(SO4)2·6H2O

monoklin : 2/m : C2/c

7.CD.370

Tamarugite

NaAl(SO4)2·6H2O

monoklin : 2/m : P21/a

7.CD.375

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

Krausite

KFe3+(SO4)2·H2O

monoklin : 2/m : P21/m

 29.05.01.01

Goldichite

KFe3+(SO4)2·4H2O

monoklin : 2/m : P21/c

 29.05.02.01

Tamarugite

NaAl(SO4)2·6H2O

monoklin : 2/m : P21/a

 29.05.03.01

Amarillite

NaFe3+(SO4)2·6H2O

monoklin : 2/m : C2/c

 29.05.03.02

Mendozite

NaAl(SO4)2·11H2O

monoklin : 2/m : C2/c

 29.05.04.01

Alum-(K)

KAl(SO4)2·12H2O

kubisch : m3 : Pa3

 29.05.05.01

Alum-(Na)

NaAl(SO4)2·12H2O

kubisch : m3 : Pa3

 29.05.05.02

Tschermigite

(NH4)Al(SO4)2·12H2O

kubisch : m3 : Pa3

 29.05.05.03

Lonecreekite

(NH4)(Fe3+,Al)(SO4)2·12H2O

kubisch : m3 : Pa3

 29.05.05.04

Lanmuchangite

TlAl[SO4]2·12H2O

kubisch : m3 : Pa3

 29.05.05.05

Other languages

German

Amarillit

Spanish

Amarillita

French

Amarillite

English

Amarillite

Russian

Амариллит

Simplified Chinese

黄铁钠矾

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

German pages

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