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Heulandite-K

Pictures (4 Images total)

Heulandit-K
Views (Image: 1321541723): 1255
Heulandit-K

Größe: 0,7 mm; Fundort: Contrada Segani, San Bortolo di Arzignano, Vicenza, Venetien (Veneto), Italien
Copyright: Enrico Bonacina
Contribution: Hg 2011-11-17
Locality: Contrada Segani / San Bortolo di Arzignano / Vicenza, Provinz / Venetien (Veneto), Region / Italien
Heulandit-K
Views (Image: 1324820501): 978
Heulandit-K

Größe: 2,53 mm, Fundort: Contrada Re, Cerealto, Valdagno, Vicenza, Provinz, Venetien (Veneto), Region, Italien
Copyright: Matteo Chinellato
Contribution: Hg 2011-12-25
Locality: Contrada Re / Cerealto / Valdagno / Vicenza, Provinz / Venetien (Veneto), Region / Italien
Heulandit-(K) vom Mirador de la Centinela, Teneriffa
Views (Image: 1544014787): 687
Heulandit-(K) vom Mirador de la Centinela, Teneriffa

Farblose Tafeln auf krustenförmigem Hollandit und Rancieit. Nephelin-Syenit. Bildbreite 1,5 mm
Collection: humboldt
Copyright: Kurt Rüsenberg
Contribution: humboldt 2018-12-05
Locality: Mirador de la Centinela / Teneriffa / Kanarische Inseln / Spanien
Dachiardit-Ca vom Mirador de la Centinela, Teneriffa
Views (Image: 1544030469): 562
Dachiardit-Ca vom Mirador de la Centinela, Teneriffa

Sechsseitiger Kristall mit Heulandit-K im Nephelin-Syenit, Bildbreite 2 mm
Collection: humboldt
Copyright: Kurt Rüsenberg
Contribution: humboldt 2018-12-05
Locality: Mirador de la Centinela / Teneriffa / Kanarische Inseln / Spanien

Collectors Summary

Color weiß, rötlichweiß, grauweiß, bräunlich weiß, gelb
Streak color weiß
Lustre Glasglanz, Perlmuttglanz
Hardness (Mohs) 3 - 3.5
Crystal System monoklin, C2/m, Cm, C2

Chemism

Chem­ical formula

(K,Ca,Na)5(Si27Al9)O72·24H2O

Addi­tional chem. informa­tion

Bei Analysen: Si/Al < 4

Chem­ical com­po­si­tion

Aluminium, Calcium, Natrium, Silicium, Kalium, Sauerstoff, Wasserstoff

Unit weight: 2774.3773049 u; Number of atoms in the formula: 185

Info

Empirical formula:

(K0.6Ca0.3Na0.1)5(Si27Al9)O72·24H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

1.74

48

25.95

1.0079470

48.3814560
Oxygen

O

55.36

96

51.89

15.9994300

1,535.9452800
Sodium

Na

0.41

0.5

0.27

22.9897702

11.4948851
Aluminium

Al

8.75

9

4.86

26.9815382

242.8338438
Silicon

Si

27.33

27

14.59

28.0855300

758.3093100
Potassium

K

4.23

3

1.62

39.0983100

117.2949300
Calcium

Ca

2.17

1.5

0.81

40.0784000

60.1176000

Strunz 9th edi­tion incl. updates

9.GE.05

9: Silikate (Germanate)
G: Gerüstsilikate (Tektosilikate) mit zeolithischem H2O; Familie der Zeolithe
E: Tafeln mit 4-4-1-1 Struktureinheiten
05:Heulandit-Gruppe

Lapis Clas­sifica­tion

VIII/J.23-008

VIII: SILIKATE
J: Gerüstsilikate (mit Zeolithen)
23: Zeolith-Gruppe; Blätterzeolithe

Clas­sifica­tion by Hölzel

9.FN.205

9: SILICATES
F: Tektosilicates
N: Heulandite-Group

Dana 8th edi­tion

77.01.04.01b

77: Tektosilicates Tectosilicate Zeolite group
01: Tektosilicates Tectosilicate Zeolite group true zeolites
04: Heulandite and related species

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

 Zeolite group  ⇒ HEU zeolite structure group  ⇒ Heulandite series

Optical Properties

Color

weiß, rötlichweiß, grauweiß, bräunlich weiß, gelb

Streak color

weiß

Diaphane­ity (Trans­parency)

transparent bis teilweise durchscheinend

Lus­tre

Glasglanz, Perlmuttglanz

max. Birefrin­gence

0.003 - 0.011

RI value α / ω / n

1.476 - 1.506

RI value β

1.479 - 1.510

RI value γ / ε

1.479 - 1.517

2V angle

Biaxial (+) 10° to 48°

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m, m, 2

Space Group number

12, 8, 5

Space Group

C2/m, Cm, C2

Cell param­e­ters a (Å)

17.498

Cell param­e­ters b (Å)

17.816

Cell param­e­ters c (Å)

7.529

Cell param­e­ters a/b or c/a

0.982

Cell param­e­ters c/b

0.423

Cell param­e­ters α

90°

Cell param­e­ters β

116.7

Cell param­e­ters γ

90°

Z

1

Volumne (ų)

2096.853

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

3 - 3.5

Density (g/cm³)

2.2

2.197 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Italien/Venetien (Veneto), Region/Vicenza, Provinz/Santorso/Albero Bassi

Preface

Author (Name, Year)

Coombs & etc., 1997

References

Alberti, A. (1972), On the crystal structure of the zeolite heulandite - Tschermaks Mineralogische und Petrographische Mitteilungen 18, 129-146.

Mineralogical Magazine 54 (1990), 91.

Canadian Mineralogist 35 (1997), 1571.

American Mineralogist 85 (2000), 225.

Comodi, P., G.D. Gatta, & P.F. Zanazzi, High-pressure structural behavior of heulandite - European Journal of Mineralogy 15 (2001), 247-255.

IMA group assignments

 
Zeolite group
 
 
 

 
 
HEU zeolite structure group
 
 
 

 
 
 
Heulandite series
 
monoklin
 

 
 
 
 
Heulandite-Ba
(Ba,Ca,K,Na,Sr)5(Si27Al9)O72·22H2O
monoklin
C2/m

 
 
 
 
Heulandite-Ca
(Ca,Na,K)5(Si27Al9)O72·26H2O
monoklin
C2/m

 
 
 
 
Heulandite-K
(K,Ca,Na)5(Si27Al9)O72·24H2O
monoklin
C2/m, Cm, C2

 
 
 
 
Heulandite-Na
(Na,Ca)6(Si,Al)36O72·24H2O
monoklin
C2/m, Cm, C2

 
 
 
 
Heulandite-Sr
(Sr,Na,K)5(Si27Al9)O72·24H2O
monoklin
C2, ,

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Actuality: 23. Jun 2022 - 19:34:05

Other languages

German

Heulandit-K

Spanish

Heulandita-K

English

Heulandite-K

French

Heulandite-K

Russian

Гейландит-K

Alternative Name

Simplified Chinese

片沸石-K

Simplified Chinese

钾片沸石

CNMNC symbol

Symbol

Hul-K

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

German pages

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Mineralienatlas.de (Forum) - search for: Heulandit-K

English pages

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RRUFF - References and PDF downloads - search for: Heulandite-K
American-Mineralogist-Crystal-Structure-Database - search for: Heulandite-K
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Russian pages

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German pages

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Locations with GPS information