Search Results
Sadanagaite was first described as a new silica-poor amphibole (IMA 1980-027), published by Shimazaki et al. (1984). It was redefined in the 1997 amphibole nomenclature (Leake et al., 1997). The original definition of sadanagaite has K>Na in the A position, this was reversed in 1997.
Sadanagaite Comments: Heavy mineral concentrate of black to dark brown grains showing strong pleochroism. Location: Ilmen Mts, Chelyabinsk Oblast', Urals Region, Russia.
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 ...
- Hidehiko Shimazaki, Michiaki Bunno, Tohru Ozawa
- 1984
Feb 1, 2008 · THE CRYSTAL CHEMISTRY OF Al-RICH AMPHIBOLES: SADANAGAITE AND POTASSIC-FERRISADANAGAITE. Frank C. Hawthorne; George E. Harlow. Author and Article Information. The Canadian Mineralogist (2008) 46 (1): 151–162. https://doi.org/10.3749/canmin.46.1.151. Article history. Cite. Share. Permissions. Abstract.
The sadanagaite root name minerals are defined as minerals in the calcium amphibole subgroup with 0.5 < A (Na+K+ 2Ca) where Na or K is dominant, and with 1.5 < Z (Al+Fe 3+ +2Ti), where Al or Fe 3+ are dominant.
Sadanagaite (Al;Fe3+)2](Si5Al3)O22(OH)2 °c 2001 Mineral Data Publishing, version 1.2 Crystal Data: Monoclinic. Point Group: m; 2; or 2=m: Prismatic crystals, to 1mm; as polycrystalline aggregates. Physical Properties: Cleavage: Perfect on f110g. Tenacity: [Brittle.] Hardness = »6 D(meas.) = n.d. D(calc.) = 3.30 Optical Properties ...
SADANAGAITE is a subsilicic alumina-rich calcic amphibole with Si < 5.5 for O = 23. It was first reported by Shimazaki et al. (1984) in skarns of the arnphibolite facies (T = 600 ~ in the Ryrke Metamorphic Belt. Recently van Marcke de Lum- men and Verkaeren (1985) found sadanagaite in