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|Name:||Named for its thorium content and Latin "gummi", gum, alluding to its gum-like appearance.|
Discredited as a valid species in 2014 (IMA14-B). This name has been used to describe heterogeneous mixtures of secondary, non-crystalline minerals, produced by the alteration, hydration, or metamictization of thorite.
Classification of Thorogummite
|IMA status:||Discredited 2014|
|Dana 8th edition ID:||18.104.22.168|
51 : NESOSILICATES Insular SiO4 Groups Only
5 : Insular SiO4 Groups Only with cations in > coordination
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Type Occurrence of Thorogummite
|Type Locality:||Baringer Hill (Barringer Hill), Bluffton, Llano Co., Texas, USA|
|Year of Discovery:||1889|
Physical Properties of Thorogummite
|Colour:||Yellow-brown, yellow-green, black|
Crystallography of Thorogummite
|Cell Parameters:||a = 7.06Å, c = 6.26Å|
|Ratio:||a:c = 1 : 0.887|
|Unit Cell Volume:||V 312.02 Å³ (Calculated from Unit Cell)|
Chemical Properties of Thorogummite
|Simplified for copy/paste:||(Th,U)(SiO4)1-x(OH)4x|
|Essential elements:||H, O, Si, Th|
|All elements listed in formula:||H, O, Si, Th, U|
Other Names for Thorogummite
|Health Warning:||Contains thorium and uranium - always wash hands after handling. Avoid inhaling dust when handling or breaking. Never lick or ingest. Avoid prolonged exposure in proximity of the body. Store away from inhabited areas.|
References for Thorogummite
American Journal of Science (1889): 138: 480.
Frondel, C. (1958): Systematic Mineralogy of Uranium and Thorium", GSC. Bull. 1064. [gives R.I. of 1.54-1.64]
American Mineralogist (1953): 38: 1007-1018.
Canadian Mineralogist (1989): 27: 643.
Internet Links for Thorogummite
Localities for Thorogummite
The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
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Locality Updated: Jebel Harmun, Hatrurim Formation, West Bank, PalestineFrom Knut Edvard Larsen, 18th Sep 2014 19:34:54