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Heulandite

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Upper New Street Quarry (Burger's Quarry), Paterson, Passaic Co., New Jersey, USA
© 2002 John H. Betts

Show Heulandite Photos (386)
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
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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:
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Heulandite no.8 - Goldschmidt (1913-1926)
Heulandite no.38 - Goldschmidt (1913-1926)

About Crystal Atlas

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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

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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

Member of Group:
Zeolite Group:
Related Minerals - Strunz Grouping):

- +
8/.-Axinite
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
8/.-25Rinkite
Na(Na,Ca)
 
2
(Ca,Ce)
 
4
Ti[F
 
2
|(O,F)
 
2
|(Si
 
2
O
 
7
)
 
2
]
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
(Na,K)
 
2-3
(Ca
 
4
Na
 
3
)Si
 
16
O
 
38
F
 
2
 · 3.5H
 
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
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)
Other Languages:
German:Euzeolit
Euzeolith
Euzolith
Heulandit
Lincolnit
Japanese:輝沸石
Spanish:Heulandita
Lincolnita
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

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    Localities for Heulandite

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