Harmotome

Har'mo·tome (-mo*tōm) noun [ Greek 'armo`s a joint + te`mnein to cut: confer French harmotome .] (Min.) A hydrous silicate of alumina and baryta, occurring usually in white cruciform crystals; cross- stone. » A related mineral, called lime harmotome...
Found on http://www.encyclo.co.uk/webster/H/15

Harmotome

• (n.) A hydrous silicate of alumina and baryta, occurring usually in white cruciform crystals; cross-stone.
Found on http://thinkexist.com/dictionary/meaning/harmotome/

harmotome

hydrated barium aluminosilicate mineral, (Ba,Na,K)1–2 (Si,Al)8O16 · 6H2O, in the zeolite family. Harmotome is isostructural with the mineral ...
Found on http://www.britannica.com/eb/a-z/h/18

Harmotome

Harmotome or cross-stone is a hydrous silicate of alumina and baryta which occurs in right rectangular prisms terminated by four rhombic planes corresponding to the solid angles of the prism; but more frequently in twin-crystals formed by the intersection of two flattened prisms at right angles to each other. Its prevailing colour is white, but may...
Found on http://www.probertencyclopaedia.com/browse/HH.HTM

Harmotome

Harmotome is a mineral, one of the rarer zeolites; a hydrated barium silicate with formula: (Ba0.5,Ca0.5,Na,K)5Al5,Si11O32·12(H2O). It forms vitreous white well defined monoclinic crystals, often associated with calcite and other zeolites. It has a Mohs hardness of 4 to 5 and a specific gravity of 2.44 to 2.5. ==Name and discovery== Named from th...
Found on http://en.wikipedia.org/wiki/Harmotome
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