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Mendozite

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Mendozit
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Mendozit

weiße, seidig glänzende Aggregate von Mendozit, Faraglione Ranni, Porto Levante, Insel Vulcano, Sizilien, Italien; BB 5 mm

Copyright: Joy Desor
Contribution: openpit 2020-04-26
Locality: Faraglione Ranni / Porto Levante / Vulcano, Insel / Äolische (Liparische) Inseln (Isole Eolie; Isole Lipari) / Messina, Provinz / Sizilien (Sicilia), Region / Italien

Collectors Summary

Color farblos
Streak color weiß
Hardness (Mohs) 3
Solubility +++ H2O
Crystal System monoklin, C2/c

Chemism

Chem­ical formula

NaAl(SO4)2·11H2O

Chem­ical com­po­si­tion

Aluminium, Natrium, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 440.2663124 u; Number of atoms in the formula: 45

Info

Empirical formula:

NaAl(SO4)2·11H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

5.04

22

48.89

1.0079470

22.1748340

Oxygen

O

69.05

19

42.22

15.9994300

303.9891700

Sodium

Na

5.22

1

2.22

22.9897702

22.9897702

Aluminium

Al

6.13

1

2.22

26.9815382

26.9815382

Sulfur

S

14.57

2

4.44

32.0655000

64.1310000

Anal­y­sis wt%

Na2O : 7.04, Al2O3 : 11.58, SO3 : 36.37, H2O : 45.01 (Ref: berechnet)

Strunz 9th edi­tion incl. updates

7.CC.15

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

Lapis Clas­sifica­tion

VI/C.13-010

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

Clas­sifica­tion by Hölzel

7.CD.280

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

Dana 8th edi­tion

29.05.04.01

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

farblos

Streak color

weiß

max. Birefrin­gence

0.016

Birefringence chart\! Mendozite title=Birefringence chart Mendozite

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

1.449

RI value β

1.460

RI value γ / ε

1.465

Ri mean

1.458

2V angle

Biaxial (-) 56°

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

15

Space Group

C2/c

Cell param­e­ters a (Å)

21.75

Cell param­e­ters b (Å)

9.108

Cell param­e­ters c (Å)

8.298

Cell param­e­ters a/b or c/a

2.388

Cell param­e­ters c/b

0.911

Cell param­e­ters α

90°

Cell param­e­ters β

92.47

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

1642.298

X-Ray Pow­der Diffrac­tion

10.9(30),
4.76(80),
4.61(20),
4.58(60),
4.15(50),
3.60(30),
3.50(100),
2.644(30)

XRD chart Mendozite

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)

3

VHN (Hard­ness Vick­ers)

83 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

1.75 (gemessen)

1.781 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ H2O

(Co-)Type locality

(Co-)Type locality

Argentinien/Mendoza, Provinz/San Juan

Preface

Author (Name, Year)

Dana, 1868

References

Handbook of Mineralogy (Anthony et al.), 5 (2003), 440

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

Kalinite

KAl(SO4)2·11 H2O

monoklin : 2/m : C2/c

7.CC.15

Mendozite

NaAl(SO4)2·11H2O

monoklin : 2/m : C2/c

7.CC.15

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

Mendozite

NaAl(SO4)2·11H2O

monoklin : 2/m : C2/c

VI/C.13-010

Kalinite

KAl(SO4)2·11 H2O

monoklin : 2/m : C2/c

VI/C.13-020

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

Pickeringite

MgAl2(SO4)4·22H2O

monoklin : 2/m : P21/c

7.CD.200

Dietrichite

(Zn,Fe2+,Mn)Al2(SO4)4·22H2O

monoklin : 2/m : P21/c

7.CD.210

Halotrichite

Fe2+Al2(SO4)4·22H2O

monoklin : 2/m : P21/c

7.CD.220

Wupatkiite

(Co,Mg)Al2[SO4]4·22H2O

monoklin : 2/m : P21/c

7.CD.225

Apjohnite

MnAl2(SO4)4·22H2O

monoklin : 2/m : P21/c

7.CD.230

Bílinite

Fe2+Fe23+(SO4)4·22H2O

monoklin : 2/m : P21/c

7.CD.240

'Redingtonite'

(Fe2+,Mg,Ni)(Cr,Al)2(SO4)4·22H2O

7.CD.250

Mendozite

NaAl(SO4)2·11H2O

monoklin : 2/m : C2/c

7.CD.280

Kalinite

KAl(SO4)2·11 H2O

monoklin : 2/m : C2/c

7.CD.285

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

Spanish

Mendocita / Mendozita

German

Mendozit

French

Mendozite

English

Mendozite

Russian

Мендоцит

Alternative Name

Spanish

Mendozita

Native Soda-Alum

German

Natronalaun

Natrumalaun

Soda-Alum

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

German pages

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

English pages

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

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Mineral Dealer

German pages

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Locations with GPS information