1. 
   Allophane
   Allophane is a amorphous to poorly-crystalline hydrous aluminium silicate clay mineraloid. Its chemical formula is Al2O3·(SiO2)1.3-2·2.5-3(H2O). Since it has short-range atomic order, it is a mineraloid, rather than a mineral, and can be identified by its distinctive infrared spectrum and its X-r...
   Found op http://en.wikipedia.org/wiki/Allophane
   
   
2. 
   allophane
   (from the article `clay mineral`) Imogolite is an aluminosilicate with an approximate composition of SiO2 Al2O3 2.5H2O. This mineral was discovered in 1962 in a soil derived from ...
   Found op http://www.britannica.com/eb/a-z/a/50
   
   
3. 
   allophane
   allophane 1. An amorphous clay mineral having a variable composition of aluminum silicate, hydrated water, and traces of other minerals. 2. An amorphous, variously colored, hydrated aluminosilicate mineral.
   Found op http://www.wordinfo.info/words/index/info/view_unit/1627/
   
   
4. 
   Allophane
   Hydrated aluminosilicate substance ordinarily found associated with clay minerals.
   Found op http://www.physicalgeography.net/physgeoglos/a.html
   
   
5. 
   Allophane
   Allophane is a mixture of minerals bound together in a gel and found in cavities and fissures in metal-bearing ore veins and in some coal deposits. Often
   Found op http://www.probertencyclopaedia.com/browse/HA.HTM
   
   

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