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・ Syngnathus argentatus
・ Syngnathus carinatus
・ Syngnathus dawsoni


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Syngenite : ウィキペディア英語版
Syngenite

Syngenite is an uncommon potassium calcium sulfate mineral with formula K2Ca(SO4)2·H2O. It forms as prismatic monoclinic crystals and as encrustations.
==Discovery and occurrence==
It was first described in 1872 for an occurrence as druse on halite in the Kalusa Salt deposit, Ivanovo-Frankovsk Oblast', Ukraine.〔 The name is from Greek 'συγγενής' (''related'') due to its chemical similarity to polyhalite.〔〔
It occurs in marine evaporite deposits as a diagenetic phase. It also forms as a volcanic sublimate, as vein fillings in geothermal fields and in caves where it is derived from bat guano. It occurs in association with halite and arcanite in salt deposits; and with biphosphammite, aphthitalite, monetite, whitlockite, uricite, brushite and gypsum in cave environments.〔

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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