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Sadanagaite, (K,Na)CazGe2*,Mg,Al,Fe3*,Ti)r[(Si,AlhO22(OH)2] where Fe2* = Mg, Al = Fe3* and Si < 5.5, and its Mg-rich analogue, magnesio-sadanagaite Fe2+ < Mg, are extremely SiO2-poor new amphiboles, which require the compositional extension of the edenite-pargasite series, and amending of the classification and nomenclature of amphi-boles ...
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Sadanagaite is a rare silicate mineral that is a silica-poor member of the Calcium Amphibole Subgroup of minerals. Technically speaking, Sadanagaite is a subsilicic, alumina-rich, calcic amphibole. Sadanagaite is also barely radioactive due to its potassium (K) content. Sadanagaite is actually considered a group name with over a dozen members each varying slightly in their …
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Sadanagaite, (K,Na)Ca 2 (Fe 2+,Mg,Al,Fe 3+,Ti) 5 [(Si,Al) 8 O 22 (OH) 2] where Fe 2+ ≥ Mg, A1 ≥ Fe 3+ and Si < 5.5, and its Mg-rich analogue, magnesio-sadanagaite Fe 2+ < Mg, are extremely SiO 2-poor new amphiboles, which require the compositional extension of the edenite-pargasite series, and amending of the classification and nomenclature ...
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