Definitions for prehnite
prehnite

WiktionaryRate this definition:0.0 / 0 votes

1. prehnitenoun

   A mineral, a basic calcium, aluminium and iron aluminosilicate, which occurs in stalagtitic aggregates or curved crystals, CaAlSiO(OH).

Webster DictionaryRate this definition:0.0 / 0 votes

1. Prehnitenoun

   a pale green mineral occurring in crystalline aggregates having a botryoidal or mammillary structure, and rarely in distinct crystals. It is a hydrous silicate of alumina and lime

2. Etymology: [So called from the German Colonel Prehn, who first found it.]

WikidataRate this definition:0.0 / 0 votes

1. Prehnite

   Prehnite is a phyllosilicate of calcium and aluminium with the formula: Ca2Al(OH)2. Limited Fe3+ substitutes for aluminium in the structure. Prehnite crystallizes in the orthorhombic crystal system, and most oftens forms as stalactitic or botryoidal aggregates, with only just the crests of small crystals showing any faces, which are almost always curved or composite. Very rarely will it form distinct, well individualized crystals showing a square-like cross-section, like those found at the Jeffrey Mine in Asbestos, Quebec, Canada. It is brittle with an uneven fracture and a vitreous to pearly lustre. Its hardness is 6-6.5, its specific gravity is 2.80-2.90 and its color varies from light green to yellow, but also colorless, blue or white. In April 2000, a rare orange Prehnite was discovered at the famous Kalahari Manganese Fields in South Africa. It is mostly translucent, and rarely transparent. Though not a zeolite, it is found associated with minerals such as datolite, calcite, apophyllite, stilbite, laumontite, heulandite etc. in veins and cavities of basaltic rocks, sometimes in granites, syenites, or gneisses. It is an indicator mineral of the prehnite-pumpellyite metamorphic facies. It is the first mineral to be named after someone, and was first described in 1789 for an occurrence in Haslach, Harzburg and Oberstein, Germany, and named for Colonel Hendrik Von Prehn, commander of the military forces of the Dutch colony at the Cape of Good Hope from 1768 to 1780. Extensive deposits of gem quality Prehnite occur in the basalt tableland surrounding Wave Hill Station in the central Northern Territory, of Australia.

Chambers 20th Century DictionaryRate this definition:0.0 / 0 votes

1. Prehnite

   pren′īt, n. a hydrous silicate of alumina and lime, usually of a pale-green colour. [Named after Prehn, the discoverer of the mineral.]

Anagrams for prehnite »

1. trephine

2. nephrite

How to pronounce prehnite?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say prehnite in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of prehnite in Chaldean Numerology is: 8

2. Pythagorean Numerology

   The numerical value of prehnite in Pythagorean Numerology is: 5

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References

1. ^ Wiktionary
   https://en.wiktionary.org/wiki/Prehnite
2. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/prehnite
3. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=prehnite
4. ^ Chambers 20th Century Dictionary
   https://www.gutenberg.org/files/37683/37683-h/37683-h.htm#:~:text=prehnite