heulandite

Name:

heulandite

A photo of the mineral heulandite

Class:

Silicates

Chemistry:

(Na,K,Ca,Sr,Ba)5Al9Si27* 26 H2O zeolite - hydrous sodium calcium aluminum silicate

Color(s):

red, orange, white, gray, Streak: white

Hardness:

3.5 - 4.0

SpecGrav:

2.1 - 2.2

Fracture:

uneven

Cleavage:

perfect 1 direction

Crystal:

monoclinic (often tabular "coffin" shaped crystals)

Envronment:

in cavities in basaltic rocks, and sometime contact metamorphics.

Association:

other zeolites, quartz, calcite

Locals:

| Nova Scotia/Canada | Brazil | Iceland | New Jersey/USA | Norway |

Misc:

it is one of the most open structured of the zeolite and capable of holding/trapping a number of large ions.

Photos
& Locals:

1.) New South Wales, Austrailia
2.) New South Wales, Austrailia
3.) Jalgaon, India
4.) Jalgaon, India

5.) Nasik, India
6.) Nasik, India
7.) Pato Branco, Parana State, Brazil
8.) Pato Branco, Parana State, Brazil

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Name:	heulandite
Class:	Silicates
Chemistry:	(Na,K,Ca,Sr,Ba)5Al9Si27* 26 H2O zeolite - hydrous sodium calcium aluminum silicate
Color(s):	red, orange, white, gray, Streak: white
Hardness:	3.5 - 4.0	SpecGrav:	2.1 - 2.2
Fracture:	uneven	Cleavage:	perfect 1 direction
Crystal:	monoclinic (often tabular "coffin" shaped crystals)
Envronment:	in cavities in basaltic rocks, and sometime contact metamorphics.
Association:	other zeolites, quartz, calcite
Locals:	\| Nova Scotia/Canada \| Brazil \| Iceland \| New Jersey/USA \| Norway \|
Misc:	it is one of the most open structured of the zeolite and capable of holding/trapping a number of large ions.

	Photos & Locals:
		1.) New South Wales, Austrailia 2.) New South Wales, Austrailia 3.) Jalgaon, India 4.) Jalgaon, India		5.) Nasik, India 6.) Nasik, India 7.) Pato Branco, Parana State, Brazil 8.) Pato Branco, Parana State, Brazil

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