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Mordenite Crystals

Mordenite from India

About Mordenite crystals

Mordenite is a zeolite mineral with the chemical formula: Ca, Na2, K2)Al2Si10O24·7H2O

It is one of the six most abundant zeolites and is used commercially. It was first described in 1864 by Henry How. He named it after the small community of Morden, Nova Scotia, Canada, along the Bay of Fundy, where it was first found. In India it is a frequent mineral in the Deccan Trap formation.

Mordenite crystallizes as fibrous aggregates, masses, and vertically striated prismatic crystals. When it forms well-developed crystals they are hairlike; very long, thin, and delicate.

It may be colorless, white, or faintly yellow or pink.

It has Mohs hardness of 5 and a density of 2.1 g/cm3.

Mordenite India
Mordenite from India

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The Geology of the Indian Deccan Traps.

 

The Deccan Traps is one of the largest volcanic features on Earth. It consists of numerous layers of solidified flood basalt that together are more than about 2,000 meters (6,600 ft) thick. Today it covers an area of about 500,000 square kilometers (200,000 sq mi), and has a volume of about 1,000,000 cubic kilometres (200,000 cu mi).

The term trap is derived from the Swedish word for stairs (trapp) and refers to the step-like hills forming the landscape of the region. The name Deccan has Sanskrit origins meaning “southern”.

The Deccan Traps began forming 66.25 million years ago, at the end of the Cretaceous period, when lava began to extrude through fissures in the crust known as fissure eruptions. This series of eruptions may have lasted for less than 30,000 years.

The release of volcanic gases, particularly sulfur dioxide, during the formation of the traps may have contributed to climate change. An average drop in temperature of about 2 °C (3.6 °F) was recorded during this period.

Work published in 2014 by geologist Gerta Keller and others on the timing of the Deccan volcanism suggests the Cretaceous–Paleogene (K–Pg) extinction event may have been caused by both the volcanism at the Deccan traps and the Chicxulub impact event in North America, which would have produced a sunlight-blocking dust cloud that killed much of the plant life and reduced global temperature (this cooling is called an impact winter).

 

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Mordenite India
Mordenite from India
Mordenite from India
Mordenite from India
Mordenite from India

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