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Starkeyite

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Starkeyit
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Starkeyit

Bildbreite: 4 mm; Fundort: Mosnico-Sanico Straßeneinschnitt, Vendrogno, Bellano, Colico, Provinz Lecco, Region Lombardei, Italiien

Copyright: Luigi Chiappino
Contribution: slugslayer 2011-12-04
Locality: Mosnico-Sanico-Straßeneinschnitt / Vendrogno / Lecco, Provinz / Lombardei (Lombardia), Region / Italien

Collectors Summary

Color weiß
Streak color weiß
Hardness (Mohs) soft
Solubility +++ H2O, Alkohol, Säuren
Crystal System monoklin, P21/n

Chemism

Chem­ical formula

MgSO4·4H2O

Chem­ical com­po­si­tion

Magnesium, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 192.429576 u; Number of atoms in the formula: 18

Info

Empirical formula:

MgSO4·4H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

4.19

8

44.44

1.0079470

8.0635760

Oxygen

O

66.52

8

44.44

15.9994300

127.9954400

Magnesium

Mg

12.63

1

5.56

24.3050600

24.3050600

Sulfur

S

16.66

1

5.56

32.0655000

32.0655000

Anal­y­sis wt%

MgO : 20.95, SO3 : 41.61, H2O : 37.45 (Ref: berechnet)

Strunz 9th edi­tion incl. updates

7.CB.15

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

Lapis Clas­sifica­tion

VI/C.03-010

VI: SULFATE, CHROMATE, MOLYBDATE UND WOLFRAMATE
C: Wasserhaltige Sulfate, ohne fremde Anionen
3: Mittelgroße Kationen; Rozenit-Reihe

Clas­sifica­tion by Hölzel

7.CB.100

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
1: Starkeyite-Group

Dana 8th edi­tion

29.06.06.02

29: Hydrated Acid and Sulfates
06: Hydrated Acid and Sulfates where A XO4 · x(H2O)
06: Rozenite Group (Monoclinic)

IMA sta­tus

Mit Anerkennung der CNMNC umbenannt

Optical Properties

Color

weiß

Streak color

weiß

max. Birefrin­gence

0.007

Birefringence chart\! Starkeyite title=Birefringence chart Starkeyite

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

1.490

RI value β

1.491

RI value γ / ε

1.497

Ri mean

1.493

2V angle

Biaxial (+) 50°

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/n

Cell param­e­ters a (Å)

5.922

Cell param­e­ters b (Å)

13.604

Cell param­e­ters c (Å)

7.905

Cell param­e­ters a/b or c/a

0.435

Cell param­e­ters c/b

0.581

Cell param­e­ters α

90°

Cell param­e­ters β

90.85

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

636.78

X-Ray Pow­der Diffrac­tion

6.83(40),
5.43(70),
4.70(30),
4.46(100),
3.951(60),
3.398(40),
3.216(40),
2.946(50)

XRD chart Starkeyite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

soft

VHN (Hard­ness Vick­ers)

53 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.01 (berechnet)

2.007 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ H2O, Alkohol, Säuren

(Co-)Type locality

(Co-)Type locality

USA/Missouri/Madison Co./Starkey mine

Preface

Author (Name, Year)

Grawe, 1945

References

Handbook of Mineralogy (Anthony et al.), 5 (2003), 663

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

Ilesite

(Mn,Zn,Fe2+)SO4·4H2O

monoklin : 2/m : P21/n

7.CB.15

Aplowite

(Co,Mn,Ni)SO4·4H2O

monoklin : 2/m : P21/n

7.CB.15

Boyleite

(Zn,Mg)SO4·4H2O

monoklin : 2/m : P21/n

7.CB.15

Rozenite

Fe2+SO4·4H2O

monoklin : 2/m : P21/n

7.CB.15

'Starkeyite'

MgSO4·4H2O

monoklin : 2/m : P21/n

7.CB.15

Drobecite

CdSO4·4H2O

monoklin : 2/m : P21/m

7.CB.15

Cranswickite

MgSO4·4H2O

monoklin : m : C2/c

7.CB.15

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

'Starkeyite'

MgSO4·4H2O

monoklin : 2/m : P21/n

VI/C.03-010

Cranswickite

MgSO4·4H2O

monoklin : m : C2/c

VI/C.03-015

Rozenite

Fe2+SO4·4H2O

monoklin : 2/m : P21/n

VI/C.03-020

Ilesite

(Mn,Zn,Fe2+)SO4·4H2O

monoklin : 2/m : P21/n

VI/C.03-030

Aplowite

(Co,Mn,Ni)SO4·4H2O

monoklin : 2/m : P21/n

VI/C.03-040

Boyleite

(Zn,Mg)SO4·4H2O

monoklin : 2/m : P21/n

VI/C.03-050

Drobecite

CdSO4·4H2O

monoklin : 2/m : P21/m

VI/C.03-060

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

'Starkeyite'

MgSO4·4H2O

monoklin : 2/m : P21/n

7.CB.100

Cranswickite

MgSO4·4H2O

monoklin : m : C2/c

7.CB.105

Boyleite

(Zn,Mg)SO4·4H2O

monoklin : 2/m : P21/n

7.CB.120

Rozenite

Fe2+SO4·4H2O

monoklin : 2/m : P21/n

7.CB.130

Aplowite

(Co,Mn,Ni)SO4·4H2O

monoklin : 2/m : P21/n

7.CB.150

Ilesite

(Mn,Zn,Fe2+)SO4·4H2O

monoklin : 2/m : P21/n

7.CB.160

Drobecite

CdSO4·4H2O

monoklin : 2/m : P21/m

7.CB.170

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

Bassanite

CaSO4·0.5H2O

monoklin : 2 : I2

29.06.01.01

Kieserite

MgSO4·H2O

monoklin : 2/m : C2/c

29.06.02.01

Szomolnokite

Fe2+SO4·H2O

monoklin : 2/m : C2/c

29.06.02.02

Szmikite

MnSO4·H2O

monoklin : 2/m : C2/c

29.06.02.03

Poitevinite

Cu(SO4)·H2O

triklin : 1 : P1

29.06.02.04

Gunningite

(Zn,Mn)SO4·H2O

monoklin : 2/m : C2/c

29.06.02.05

Dwornikite

(Ni,Fe2+)SO4·H2O

monoklin : 2/m : C2/c

29.06.02.06

Cobaltkieserite

Co[SO4]·H2O

monoklin : 2/m : C2/c

29.06.02.07

Gypsum

CaSO4·2H2O

monoklin : 2/m : I2/a

29.06.03.01

Bonattite

CuSO4·3H2O

monoklin : m : Cc

29.06.05.01

Rozenite

Fe2+SO4·4H2O

monoklin : 2/m : P21/n

29.06.06.01

'Starkeyite'

MgSO4·4H2O

monoklin : 2/m : P21/n

29.06.06.02

Ilesite

(Mn,Zn,Fe2+)SO4·4H2O

monoklin : 2/m : P21/n

29.06.06.03

Aplowite

(Co,Mn,Ni)SO4·4H2O

monoklin : 2/m : P21/n

29.06.06.04

Boyleite

(Zn,Mg)SO4·4H2O

monoklin : 2/m : P21/n

29.06.06.05

Chalcanthite

CuSO4·5H2O

triklin : 1 : P1

29.06.07.01

Siderotil

Fe(SO4)·5H2O

triklin : 1 : P1

29.06.07.02

Pentahydrite

MgSO4·5H2O

triklin : 1 : P1

29.06.07.03

Jôkokuite

MnSO4·5H2O

triklin : 1 : P1

29.06.07.04

Hexahydrite

MgSO4·6H2O

monoklin : 2/m : C2/c

29.06.08.01

Bianchite

(Zn,Fe2+)(SO4)·6H2O

monoklin : 2/m : C2/c

29.06.08.02

Ferrohexahydrite

Fe2+SO4·6H2O

monoklin : 2/m : C2/c

29.06.08.03

Nickelhexahydrite

(Ni,Mg,Fe2+)(SO4)·6H2O

monoklin : 2/m : A2/a

29.06.08.04

Moorhouseite

(Co,Ni,Mn)SO4·6H2O

monoklin : 2/m : C2/c

29.06.08.05

Chvaleticeite

(Mn2+,Mg)SO4·6H2O

monoklin : 2/m : C2/c

29.06.08.06

Retgersite

NiSO4·6H2O

tetragonal : 422, 422 : P41212, P43212

29.06.09.01

Other languages

German

Starkeyit

Spanish

Starkeyita

French

Starkeyite

English

Starkeyite

Russian

Старкеит

Simplified Chinese

四水泻盐

Alternative Name

German

Leonhardtit

English

Leonhardtite

Simplified Chinese

四水泻利盐

Simplified Chinese

四水镁矾

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

German pages

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

English pages

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

Russian pages

Webmineral.ru - search for: Старкеит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Starkeyit
Crystal-Treasure.com - search for: Starkeyit
Bosse - search for: Starkeyit

Locations with GPS information