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Polyhalite

Pictures (14 Images total)

Polyhalit xx
Views (Image: 1419070708): 2061
Polyhalit xx

4,5 cm

Collection: Gerhard Brandstetter
Copyright: Gerhard Brandstetter
Contribution: Gerhard Brandstetter 2014-12-20
Locality: Salzbergbau / Ischler Salzberg / Perneck / Bad Ischl / Gmunden, Bezirk / Oberösterreich / Österreich
Polyhalit
Views (Image: 1271679396): 3477
Polyhalit

Bildbreite: 8 mm, Fundort: Kaliwerk Ellers, Neuhof, Fulda, Hessen, Deutschland.

Copyright: Luigi Chiappino
Contribution: thdun5 2010-04-19
Locality: Kaliwerk Neuhof-Ellers / Neuhof / Fulda, Landkreis / Kassel, Bezirk / Hessen / Deutschland
Polyhalit
Views (Image: 1284640059): 4039
Polyhalit

Grobkristalliner, roter Polyhalit als 5 cm breite Stufe vom Salzbergwerk Berchtesgaden, Bayern, Deutschland.

Collection: ex Andreas Gerstenberg (raritätenjäger)
Copyright: raritätenjäger
Contribution: raritätenjäger 2010-09-16
Locality: Salzbergwerk Berchtesgaden / Berchtesgadener Land, Landkreis / Oberbayern, Bezirk / Bayern / Deutschland
Polyhalit
Views (Image: 1334730120): 2617
Polyhalit

Ischler Salzberg, Bad Ischl, Gmunden, Oberösterreich.11x9cm.

Collection: Mineralogisches Institut Uni Tübingen
Copyright: Doc Diether
Contribution: Doc Diether 2012-04-18
Locality: Salzbergbau / Ischler Salzberg / Perneck / Bad Ischl / Gmunden, Bezirk / Oberösterreich / Österreich
Polyhalit
Views (Image: 1377082240): 2263
Polyhalit

Kaliwerk Wintershall, Heringen, Werratal, Nordhessen. 9x7cm.

Collection: Naturmuseum Augsburg
Copyright: Doc Diether
Contribution: Doc Diether 2013-08-21
Locality: Kaliwerk Wintershall / Heringen / Hersfeld-Rotenburg, Landkreis / Kassel, Bezirk / Hessen / Deutschland
Polyhalit
Views (Image: 1418910185): 822
Polyhalit

Kohnstein Niedersachswerfen,Größe 4x1x3x cm ,Kleine; Polyhalit kugeln

Collection: Hydrobora89
Copyright: Hydrobora89
Contribution: Hydrobora89 2014-12-18
Locality: Steinbruch am Kohnstein / Salza / Nordhausen / Nordhausen, Landkreis / Thüringen / Deutschland

Collectors Summary

Color farblos, grau, grauweiß, weiß, rosa
Streak color weiß
Lustre Glasglanz, Harzglanz
Hardness (Mohs) 2.5 - 3.5
Cleavages vollkommen {001}, teilbar {010}
Solubility +++ Säuren, + H2O
Crystal System triklin, F1

Chemism

Chem­ical formula

K2Ca2Mg(SO4)4·2H2O

Chem­ical com­po­si­tion

Calcium, Magnesium, Kalium, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 602.942008 u; Number of atoms in the formula: 31

Info

Empirical formula:

K2Ca2Mg(SO4)4·2H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.67

4

12.90

1.0079470

4.0317880

Oxygen

O

47.76

18

58.06

15.9994300

287.9897400

Magnesium

Mg

4.03

1

3.23

24.3050600

24.3050600

Sulfur

S

21.27

4

12.90

32.0655000

128.2620000

Potassium

K

12.97

2

6.45

39.0983100

78.1966200

Calcium

Ca

13.29

2

6.45

40.0784000

80.1568000

Anal­y­sis wt%

K2O : 15.66, CaO : 18.75, MgO : 6.48, SO3 : 52.40, H2O : 6.07 (Ref: Dana, 7th ed. 2)

Strunz 9th edi­tion incl. updates

7.CC.65

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

Lapis Clas­sifica­tion

VI/C.20-010

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

Clas­sifica­tion by Hölzel

7.CD.800

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

Dana 8th edi­tion

29.04.05.01

29: Hydrated Acid and Sulfates
04: Hydrated Acid and Sulfates where (A+)2 Bn (XO4)p · x(H2O)

IMA sta­tus

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

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

farblos, grau, grauweiß, weiß, rosa

Streak color

weiß

Diaphane­ity (Trans­parency)

transparent bis durchscheinend

Lus­tre

Glasglanz, Harzglanz

max. Birefrin­gence

0.020

Birefringence chart\! Polyhalite title=Birefringence chart Polyhalite

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

1.547

RI value β

1.560

RI value γ / ε

1.567

Ri mean

1.558

2V angle

Biaxial (-) 62 - 70° (gemessen)

Crystallography

Crystal Sys­tem

triklin

Class (H-M)

1

Space Group number

2

Space Group

F1

Cell param­e­ters a (Å)

11.69

Cell param­e­ters b (Å)

16.33

Cell param­e­ters c (Å)

7.6

Cell param­e­ters a/b or c/a

0.716

Cell param­e­ters c/b

0.465

Cell param­e­ters α

91.6°

Cell param­e­ters β

90°

Cell param­e­ters γ

91.9°

Z

4

Volumne (ų)

1449.459

X-Ray Pow­der Diffrac­tion

5.94(20),
3.39(20),
3.17(90),
2.90(100),
2.21(20),
1.891(10),
1.861(10),
1.805(10)

XRD chart Polyhalite

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 - 3.5

VHN (Hard­ness Vick­ers)

130 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.76 (berechnet) 2.77 - 2.78 (gemessen)

2.763 ( ρ calc. Mineralienatlas )

Cleav­ages

vollkommen {001}, teilbar {010}

Insta­bil­ity

+++ Säuren, + H2O

Preface

Name from

aus dem griechischen für "viel" und "Salz" in Anlehnung an die chemische Zusammensetzung

Author (Name, Year)

Stromeyer, 1818

References

Handbook of Mineralogy (Anthony et al.), 5 (2003), 559

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

Polyhalite

K2Ca2Mg(SO4)4·2H2O

triklin : 1 : F1

7.CC.65

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

Polyhalite

K2Ca2Mg(SO4)4·2H2O

triklin : 1 : F1

VI/C.20-010

Leightonite

K2Ca2Cu(SO4)4·2H2O

monoklin : 2/m : C2/c

VI/C.20-020

Görgeyite

K2Ca5(SO4)6·H2O

monoklin : 2/m : C2/c

VI/C.20-030

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

Polyhalite

K2Ca2Mg(SO4)4·2H2O

triklin : 1 : F1

7.CD.800

Leightonite

K2Ca2Cu(SO4)4·2H2O

monoklin : 2/m : C2/c

7.CD.810

Krausite

KFe3+(SO4)2·H2O

monoklin : 2/m : P21/m

7.CD.850

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

Hydroglauberite

Na4Ca(SO4)3·2H2O

29.04.01.01

Eugsterite

Na4Ca(SO4)3·2H2O

29.04.02.01

Löweite

Na12Mg7(SO4)13·15H2O

trigonal : 3 : R3

29.04.03.01

Ferrinatrite

Na3Fe(SO4)3·3H2O

trigonal : 3 : P3

29.04.04.01

Polyhalite

K2Ca2Mg(SO4)4·2H2O

triklin : 1 : F1

29.04.05.01

Leightonite

K2Ca2Cu(SO4)4·2H2O

monoklin : 2/m : C2/c

29.04.05.02

Metavoltine

K2Na6Fe2+Fe63+(SO4)12O2·18 H2O

trigonal : 3 : P3

29.04.06.01

Görgeyite

K2Ca5(SO4)6·H2O

monoklin : 2/m : C2/c

29.04.07.01

Other languages

Spanish

Polihalita

German

Polyhalit

French

Polyhalite

English

Polyhalite

Russian

Полигалит

Ukrainian

Полігаліт

Alternative Name

German

Ischelit

Spanish

Ischelita

Ischelite

German

Mamanit

Spanish

Mamanita

German

Mamanite

German

Polygalit

Spanish

Polygalita

Polygalite

Spanish

Polyhalita

German

Polyhallit

Spanish

Polyhallita

Polyhallite

Simplified Chinese

杂卤石

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

German pages

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

English pages

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

Russian pages

Webmineral.ru - search for: Полигалит

Mineral Dealer

German pages

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

Locations with GPS information