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Alpersite

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Alpersit
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Alpersit

hellblaue Aggregate von Alpersit, Big Mike Mine, Pershing County, Nevada, USA; BB < 1 mm

Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-06-21
Locality: Big Mike mine / Tobin und Sonoma Range District / Pershing Co. / Nevada / USA

Collectors Summary

Color türkisblau bis tielfblau
Streak color weiß
Lustre Glasglanz
Hardness (Mohs) 2.5
Cleavages gut (001)
Fracture uneben
Solubility stabil bei einer Luftfeuchte von über 60%, formt das Pentahydrat
Crystal System monoklin, P21/c

Chemism

Chem­ical formula

(Mg)SO4·7H2O

Chem­ical com­po­si­tion

Magnesium, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 246.475548 u; Number of atoms in the formula: 27

Info

Empirical formula:

(Mg)SO4·7H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

5.73

14

51.85

1.0079470

14.1112580

Oxygen

O

71.40

11

40.74

15.9994300

175.9937300

Magnesium

Mg

9.86

1

3.70

24.3050600

24.3050600

Sulfur

S

13.01

1

3.70

32.0655000

32.0655000

Strunz 9th edi­tion incl. updates

7.CB.35

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

Lapis Clas­sifica­tion

VI/C.06-005

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

Clas­sifica­tion by Hölzel

7.CB.405

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
4: Epsomite-Group

Dana 8th edi­tion

29.06.10.06

29: Hydrated Acid and Sulfates
06: Hydrated Acid and Sulfates where A XO4 · x(H2O)
10: Melanterite Group (Heptahydrates, Monoclinic: P21/c)

IMA sta­tus

anerkannt 2003

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

türkisblau bis tielfblau

Streak color

weiß

Diaphane­ity (Trans­parency)

transparent

Lus­tre

Glasglanz

max. Birefrin­gence

0.007

Birefringence chart\! Alpersite title=Birefringence chart Alpersite

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

1.462

RI value β

1.465

RI value γ / ε

1.469

Ri mean

1.465

2V angle

Biaxial (+) 80°

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/c

Cell param­e­ters a (Å)

14.166

Cell param­e­ters b (Å)

6.534

Cell param­e­ters c (Å)

10.838

Cell param­e­ters a/b or c/a

2.168

Cell param­e­ters c/b

1.659

Cell param­e­ters α

90°

Cell param­e­ters β

105.92

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

964.696

X-Ray Pow­der Diffrac­tion

4.85(100), 4.79(14), 4.44(16), 3.779(38), 3.663(15), 3.254(15), 3.078(14), 2.721(14)

XRD chart Alpersite

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

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)

1.82

1.697 ( ρ calc. Mineralienatlas )

Cleav­ages

gut (001)

Frac­ture

uneben

Insta­bil­ity

stabil bei einer Luftfeuchte von über 60%, formt das Pentahydrat

Preface

Author (Name, Year)

Peterson & Hammarstrom & Seal, 2006

References

American Mineralogist 91 (2006), 261

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

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

Boothite

(Cu,Mg)(SO4)·7H2O

7.CB.35

Alpersite

(Mg)SO4·7H2O

monoklin : 2/m : P21/c

7.CB.35

Bieberite

CoSO4·7 H2O

monoklin : 2/m : P21/c

7.CB.35

Mallardite

Mn2+SO4·7H2O

monoklin : 2/m : P21/c

7.CB.35

Melanterite

Fe2+SO4·7H2O

monoklin : 2/m : P21/c

7.CB.35

Zincmelanterite

(Zn,Fe2+)[SO4]·7H2O

7.CB.35

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

Alpersite

(Mg)SO4·7H2O

monoklin : 2/m : P21/c

VI/C.06-005

Melanterite

Fe2+SO4·7H2O

monoklin : 2/m : P21/c

VI/C.06-010

Mallardite

Mn2+SO4·7H2O

monoklin : 2/m : P21/c

VI/C.06-020

Bieberite

CoSO4·7 H2O

monoklin : 2/m : P21/c

VI/C.06-030

Boothite

(Cu,Mg)(SO4)·7H2O

VI/C.06-040

Zincmelanterite

(Zn,Fe2+)[SO4]·7H2O

VI/C.06-050

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

Epsomite

MgSO4·7H2O

orthorhombisch : 222 : P212121

7.CB.400

Alpersite

(Mg)SO4·7H2O

monoklin : 2/m : P21/c

7.CB.405

Boothite

(Cu,Mg)(SO4)·7H2O

7.CB.410

Goslarite

ZnSO4·7H2O

orthorhombisch : 222 : P212121

7.CB.420

Zincmelanterite

(Zn,Fe2+)[SO4]·7H2O

7.CB.425

Melanterite

Fe2+SO4·7H2O

monoklin : 2/m : P21/c

7.CB.430

Morenosite

NiSO4·7H2O

orthorhombisch : 222 : P212121

7.CB.440

Bieberite

CoSO4·7 H2O

monoklin : 2/m : P21/c

7.CB.450

Mallardite

Mn2+SO4·7H2O

monoklin : 2/m : P21/c

7.CB.460

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

Melanterite

Fe2+SO4·7H2O

monoklin : 2/m : P21/c

29.06.10.01

Boothite

(Cu,Mg)(SO4)·7H2O

29.06.10.02

Zincmelanterite

(Zn,Fe2+)[SO4]·7H2O

29.06.10.03

Bieberite

CoSO4·7 H2O

monoklin : 2/m : P21/c

29.06.10.04

Mallardite

Mn2+SO4·7H2O

monoklin : 2/m : P21/c

29.06.10.05

Alpersite

(Mg)SO4·7H2O

monoklin : 2/m : P21/c

29.06.10.06

Epsomite

MgSO4·7H2O

orthorhombisch : 222 : P212121

29.06.11.01

Goslarite

ZnSO4·7H2O

orthorhombisch : 222 : P212121

29.06.11.02

Morenosite

NiSO4·7H2O

orthorhombisch : 222 : P212121

29.06.11.03

Minasragrite

V4+[O|SO4]·5H2O

monoklin : 2/m : P21/c

29.06.12.01

Bobjonesite

(V4+O)[SO4]·3H2O

monoklin : 2/m : P21/n

29.06.12.02

Anorthominasragrite

V4+[O|SO4]·5H2O

triklin : 1 : P1

29.06.12.03

Stanleyite

V4+[O|SO4]·6H2O

29.06.13.01

Orthominasragrite

V4+[O|SO4]·5H2O

orthorhombisch : mm2 : Pmn21

29.06.13.02

Other languages

German

Alpersit

English

Alpersite

Russian

Алперсит

Russian

Альперсит

IMA Number

IMA 2003-040

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

German pages

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

English pages

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

Russian pages

Webmineral.ru - search for: Альперсит

Mineral Dealer

German pages

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Crystal-Treasure.com - search for: Alpersit
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