Heulandite, Stilbite and Mordenite

ID	632
Mineral	Heulandite Stilbite Mordenite
Location	Poona - Maharashtra - India
Fluorescence	LW-UV: close SW-UV: close
Mindat.org	View Heulandite information at mindat.org View Stilbite information at mindat.org View Mordenite information at mindat.org

ID	1889
Long ID	1:1:1889:6
Entry type	5
About the name	Named in 1822 by Henry James Brooke in honour of Johann Heinrich "John Henry" Heuland (21 March 1778, Beyreuth, Germany - 16 November 1856, Hastings, Sussex, England, UK), a mineral collector and mineral dealer living in England. Despite having an international reputation, there are no known images of Henry Heuland.

ID	3785
Long ID	1:1:3785:9
Entry type	5
About the name	Named in 1797 by Jean-Claude de la Métherie from Greek στιλβη "stilbein", to glitter of shine, or "stilbe", a mirror, alluding to its pearly or vitreous luster. Originally, but inconsistently called zeolite in 1756 by Axel Cronstedt. Named crystalii ad centrum tendentes in 1758 by Cronstedt. In 1772, Johan Gottschalk Wallerius called this mineral zeolite selenitica lamellaris. Also in 1797, de la Métherie called this mineral zeolite nacrée. Werner (1780) called this mineral strehliger zeolith. René Just Haüy (1801) used the term stilbite anamorphique for a mineral now recognized as heulandite. Desmine was introduced in 1818 by Johann Friedrich August Breithaupt. Sphaerostilbite was used in 1832 by François Sulpice Beudant. Additional varietal names and synonyms have been proposed: blättricher zeolit, hypostilbite, puflerite, radiated zeolite, and syhedrite.

ID	2779
Long ID	1:1:2779:9
Formula	`(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆ · 28H₂O`
IMA Status	APPROVED GRANDFATHERED
Description	Zeolite Group. An unnamed K-dominant "mordenite" seems to exist in nature (e.g., Lo et al., 1991; Lo & Hsieh, 1991; Coombs et al., 1997; Sun et al., 2003). It is well-known as a synthetic compound.
General Appearance	Rounded masses to about 5 cm, blotched with green celadonite. White, yellowish or pink, sometimes with a thin yellowish crust. With a very fine fibrous structure.
Occurrence	Basalt.
Other Occurrences	Veins and amygdaloids in igneous rocks.
Discovery Year	1864
Diapheny	Transparent,Translucent
Cleavage	Perfect on {100}; distinct on {010}.
Tenacity	brittle
Colour	Colourless, white, yellowish, pinkish
Hardness (min)	3.0
Hardness (max)	4.0
About the name	For the community of Morden, Nova Scotia, the type locality.
Streak	White
Crystal System	Orthorhombic
Cleavage Type	Perfect
Fracture type	Irregular/Uneven
Morphology	Prismatic crystals, acicular to fine fibrous, radiating groups, cottony aggregates, compact, porcelaneous.
Thermal Behaviour	Before the blowpipe it fuses in a good heat without any intumescence to a glassy bead or white enamel.
Comment Luster	Pearly on {010}
Publication Year	1864
shortcode_ima	Mor

Price: € 195

Dimensions: Not registered

Weight: Not registered

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