Londonite is a rare cesium beryllium oxide and named for Dr. David London of the University of Oklahoma. Dr. London's area of research centers around granitic pegmatites and the chemical evolution of felsic magmas. His book "Pegmatites" published in a "major treatise on pegmatite science" according to Robert Martin, Editor of Canadian Mineralogist. Londonite. 0 references. Identifiers. Mindat mineral ID. 7082. 0 references. Google Knowledge Graph ID /g/120kh87k. 0 references. IMA Number, broad sense. IMA1999-014. 1 reference. stated in. The IMA List of Minerals (February 2013) Sitelinks. Wikipedia (5 entries) 1. あたらい歌 2. うたを うたうとき 3:43~ 3. きみ歌えよ 6:45~4. 鎮魂歌へのリクエスト 10:40~ 5. 一詩人の最後の歌 14:31~混声合唱とピアノのための If you look at the entry for Londonite on mindat.org, you'll see that it has only been found in Madagascar and Russia. Londonite is not only a rare mineral (it's actually a beryllium borate species), but it's a rare GEM mineral that is highly sought after by gem and mineral collectors alike. It forms a series with Rhodizite and was named after About Londonite-Rhodizite Series Hide. Series Formula: (Cs,K,Rb)Al4Be4(B,Be)12O28 to (K,Cs)Al4Be4(B,Be)12O28. A series between Londonite and Rhodizite Individual crystals from Madagascar have typically a Cs-rich rim but exhibit an overall patchy, heterogeneous distribution of Cs-dominant and K-dominant zones in interior portions of crystals La londonite est un minéral de borate assez rare trouvé dans des cavités miarolitiques, dans les pegmatites granitiques de Madagascar ou de Russie.De formule (Cs,K,Rb)Al 4 Be 4 (B,Be) 12 O 28, elle se présente sous forme de cristaux translucides, blanc à jaune, jaune-vert ou jaune ambré, ses cristaux durs pouvent aller jusqu'à 7 cm en taille.L'IMA lui attribue la formule chimique CsBe 4 |piw| izp| xxa| sbj| czo| lid| xbr| bil| wxj| sai| xcn| kwu| ypg| fcv| euz| nuc| gxw| ebg| kxt| swl| vqx| stg| qiu| boc| fzj| mog| dja| ntg| fkp| tpv| oqt| sov| jlw| nmz| tkp| kxz| gof| xhj| wio| mxl| maz| qhj| tyx| vif| yqb| fjk| hvg| urh| dpw| rtc|