1) Calcium mineral 2) Luminescent mineral 3) Zeolite
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https://www.crosswordclues.com/clue/heulandite
Heulandite is the name of a series of tecto-silicate minerals of the zeolite group. Prior to 1997, heulandite was recognized as a mineral species, but a reclassification in 1997 by the International Mineralogical Association changed it to a series name, with the mineral species being named: Heulandite-Ca, the most common of these, is a hydrous cal...
Found on
http://en.wikipedia.org/wiki/Heulandite
• (n.) A mineral of the Zeolite family, often occurring in amygdaloid, in foliated masses, and also in monoclinic crystals with pearly luster on the cleavage face. It is a hydrous silicate of alumina and lime.
Found on
http://thinkexist.com/dictionary/meaning/heulandite/
hydrated sodium and calcium aluminosilicate mineral in the zeolite family, formulated (Ca,Na)2-3Al3(Al,Si)2Si13O3612H2O. It forms brittle, ... [2 related articles]
Found on
http://www.britannica.com/eb/a-z/h/45
Heu'land·ite noun [ After
Heuland , an English mineralogist.]
(Min.) A mineral of the Zeolite family, often occurring in amygdaloid, in foliated masses, and also in monoclinic crystals with pearly luster on the cleavage face. It is a hydrous silicate of alumina and lime.
Found on
http://www.encyclo.co.uk/webster/H/41
Heulandite, named after the English mineralogist Heuland, is a mineral of the Zeolite family, often occurring in amygdaloid, in foliated masses, and also in monoclinic crystals with pearly lustre on the cleavage face. It is a hydrous silicate of alumina and lime with the formulae (Na,Ca)4- 6Al6(Al, Si) 4Si26O72ù24H2O and a relative hardness of 4. ...
Found on
http://www.probertencyclopaedia.com/browse/HH.HTM
[
n] - a group of minerals of the zeolite family consisting of a hydrous aluminum silicate of sodium and calcium
Found on
http://www.webdictionary.co.uk/definition.php?query=heulandite
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