Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (6 online) Mindat Auctions

Heulandite

Big Photo

Jalgaon District, Maharashtra, India
© Rob Lavinsky

Show Heulandite Photos (272)
Colour:WhiteHardness:3 - 3½
Name:Named after the English mineral collector, John Henry Heuland (1778-1856), a British mineral collector and dealer
Synonym of:Heulandite-Ca, Heulandite-K, Heulandite-Na, Heulandite-Sr


Heulandite now refers to a group of related minerals.

Classification of Heulandite

Strunz 8th edition ID:8/.-

8 : Silicates
:
:
Hey's CIM Ref.:16.10.19

16 : Silicates Containing Aluminum and other Metals
10 : Aluminosilicates of Ca and alkalis
mindat.org URL:http://www.mindat.org/min-1889.html
Please feel free to link to this page.

Physical Properties of Heulandite

Lustre:Vitreous, Pearly
Colour:White
Streak:White
Hardness (Mohs):3 - 3½
Density (measured):2.1 - 2.2 g/cm3
Density (calculated):2.17 g/cm3

Crystallography of Heulandite

Crystal Atlas:
Image Loading
Click on an icon to view
Heulandite no.8 - Goldschmidt (1913-1926)
Heulandite no.38 - Goldschmidt (1913-1926)

About Crystal Atlas

You may need to scroll this box using your mouse to view the full instructions.

The mindat.org Crystal Atlas allows you to view a selection of crystal drawings of real and idealised crystal forms for this mineral and, in certain cases, 3d rotating crystal objects. You need Java to see these. You can download Java for free - click here to download Java

The 3d models and java code are kindly provided by www.smorf.nl. You can control the movement of the models by holding down the left mouse-button over the 3d model and moving your mouse. Keyboard controls are:

: default positions
t/T: decrease/increase transparency x/X: next/previous texture
b/B: next/previous background w: toggle wireframe
s: toggle sticks m: toggle miller indices
k: toggle crystallographic axes =/-: zoom in/out
r: stop/start rotation 1/2/3


Note: You will not be able to switch between different crystal models using the Opera 8.5x web browser due to a bug in Opera - you need to use either Firefox or Internet Explorer 6/7 or Opera 9.
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data: Peaks:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Heulandite

Type:Biaxial (+)
RI values: nα = 1.476 - 1.506 nβ = 1.479 - 1.510 nγ = 1.479 - 1.517
2V:Measured: 10° to 48°
Maximum Birefringence:δ = 0.003 - 0.011

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r > v

Relationship of Heulandite to other Species

Related Minerals - Strunz Grouping):
8/.-Illite
K
 
0.65
A
 
2.0
 [][Al
 
0.65
Si,
 
3.35
O
 
10
](OH)
 
2
8/.-Maufite
8/.-Melilite
(Ca,Na)
 
2
(Al,Mg,Fe
2+
 
)[(Al,Si)SiO
 
7
]
8/.-Zinalsite
8/.-Lessingite-(Ce)
8/.-Sturtite
8/.-Celsian-Hyalophane Series
8/.-Moronolite
Related Minerals - Hey's Index Grouping:
16.10.1Bytownite
(Ca,Na)[Al(Al,Si)Si
 
2
O
 
8
]
16.10.2Lisetite
CaNa
 
2
Al
 
4
Si
 
4
O
 
16
16.10.4Thomsonite-Ca
NaCa
 
2
[Al
 
5
Si
 
5
O
 
20
] · 6H
 
2
O
16.10.5Gonnardite
Na
 
2
Ca[Al
 
2
Si
 
3
O
 
10
]
 
2
 · 7H
 
2
O
16.10.6Mesolite
Na
 
2
Ca
 
2
[Al
 
2
Si
 
3
O
 
10
]
 
3
 · 8H
 
2
O
16.10.7Faujasite
16.10.8Garronite
Na
 
2
Ca
 
5
Al
 
12
Si
 
20
O
 
64
·27H
 
2
O
16.10.9Boggsite
Ca
 
8
Na
 
3
(Si,Al)
 
96
O
 
192
·70H
 
2
O
16.10.10Herschelite
16.10.11Phillipsite
16.10.12Fedorite
KNa
 
4
Ca
 
4
[HSi
 
4
O
 
10
]
 
4
 · 6H
 
2
O
16.10.13Willhendersonite
KCa[Al
 
3
Si
 
3
O
 
12
] · 5H
 
2
O
16.10.14Barrerite
(Na,K,Ca
 
0.5
)
 
2
[Al
 
2
Si
 
7
O
 
18
] · 7H
 
2
O
16.10.15Mordenite
(Na
 
2
,Ca,K
 
2
)Al
 
2
Si
 
10
O
 
24
·7H
 
2
O
16.10.16Reyerite
(Na,K)
 
2
Ca
 
14
(Si,Al)
 
24
O
 
58
(OH)
 
8
·6H
 
2
O
16.10.17Lévyne
16.10.18Clinoptilolite
16.10.20Gobbinsite
Na
 
4
(Ca,Mg,K
 
2
)Al
 
6
Si
 
10
O
 
32
·12H
 
2
O
16.10.21Stilbite
16.10.22Dachiardite
(Na,K,Ca
 
0
·5)
 
4
(Al
 
4
Si
 
20
)O
 
48
·18H
 
2
O
16.10.23Offretite
KCaMgAl
 
5
Si
 
13
O
 
36
·16H
 
2
O or near
16.10.24Perlialite
K
 
9
Na(Ca,Sr)[Al
 
2
Si
 
4
O
 
12
]
 
6
 · 15H
 
2
O
16.10.25Erionite
16.10.26Paulingite
16.10.27Sodium Dachiardite
(Na
 
2
,Ca,K
 
2
)
 
4-5
Al
 
8
Si
 
40
O
 
96
·26H
 
2
O
16.10.28Mazzite-Mg
K
 
2
Mg
 
2
Ca
 
1.5
Al
 
9.5
Si
 
26.5
O
 
72
·28H
 
2
O or near
16.10.29Roggianite
Ca
 
2
Be(OH)
 
2
Al
 
2
Si
 
4
O
 
13
·2.5H
 
2
O

Other Names for Heulandite

Synonyms:
Beaumontite (of Lévy)LincolnineLincolniteStilbite AnamorphiqueStilbite (of German authors)
German names:
EuzeolitEuzeolithEuzolithHeulanditLincolnit
Japanese names:
輝沸石
Spanish names:
HeulanditaLincolnita
Varieties:
Barian Heulandite

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Heulandite

Reference List:Ventriglia U. – (1955) La struttura della heulandite. Periodico di Mineralogia – Roma pp. 49-83.

Merkle, A.B., and M. Slaughter (1968), Determination and refinement of the structure of heulandite: American Mineralogist: 53: 1120-1138.

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

Boles, J.R. (1972), Composition, optical properties, cell dimensions and thermal stability of some heulandite group zeolites: American Mineralogist: 57: 1463-1493.

Alberti, A. (1973), The structure type of heulandite B (heat-collapsed phase): Tschermaks Mineralogische und Petrographische Mitteilungen: 19: 173-184.

Alietti, A. (1972), Polymorphism and crystal chemistry of heulandite and Clinoptilolite: Am. Min.: 57: 1448-1462.

Boles, J.R. (1972), Composition, optical properties, cell dimensions and thermal stability of some heulandite group zeolites: Am. Min.: 57: 1463-1493.

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

Internet Links for Heulandite

Search Engines:
  • Look for Heulandite on Google
  • Look for Heulandite images on Google
    • Mineral Dealers:
  • Rare and Unusual minerals at Mineralogical Research Company
  • Buy fine minerals and gemstones from Pala International
  • Buy from David K Joyce minerals
  • rare and unusual minerals mainly crystallized
  • e-Rocks - Mineral Auctions and Sales
  • Search for Heulandite on minvision.com
  • Top quality minerals from Kristalle of California
  • Wright's Rock Shop - excellent mineral specimens since 1970
  • Fabre Minerals - search for Heulandite specimens
  • Fine Minerals from Dan Weinrich Minerals
  • Wendel Minerals - Auktion & Shop
  • Buy Fine Minerals from mineralsweb.com
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to find out how you can sponsor this page.

    Localities for Heulandite

    Show Locality List (774 Items)
    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    These maps work faster with Firefox!
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon & Ida Ralph 1993-2008. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register.