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Magnesiosadanagaite

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Formula:
{Na}{Ca2}{Mg3Al2}(Al3Si5O22)(OH)2
Colour:
brownish black
Lustre:
Vitreous
Hardness:
5½ - 6
Specific Gravity:
3.17 - 3.18
Crystal System:
Monoclinic
Name:
Magnesiosadanagite was defined by Shimazaki et.al(1984) as an Al rich amphibole with K>Na and Mg>Fe2+. In the 1997 amphibole nomenclature ( Leake et. al) magnesiosadanagaite was redefined with Na>K, so that the mineral originally described as magnesiosadanagaite became potassic-magnesiosadanagaite.

Magnesiosadanagaite in accordance with the 1997 nomenclature was identified and published by Banno et al. (2004).

In the 2012 amphibole nomenclature, sadanagaite was redefined to be the Na, Mg and Al dominant member of the group, thus obsoleting the name magnesiosadanagaite. The magnesiosadanagaite of Banno et. al (2004) is from 2012 named sadanagite.
Synonym:
A synonym of Sadanagaite
This page provides mineralogical data about Magnesiosadanagaite.


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References for MagnesiosadanagaiteHide

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Mineralogical Record (1998): 29: 169-174.
Banno, Y., Miyawaki, R., Matsubara, S.,
Makino, K., Bunno, M., Yamada, S. and Kamiya, T. (2004): Magnesiosadanagaite, a new member of the amphibole group from Kasuga-mura, Gifu prefecture, central Japan., European Journal of Mineralogy: 16(1): 177-183.
Hawthorne, Frank C., and Roberta Oberti (2006), On the classification of amphiboles: Canadian Mineralogist:
44(1): 1-21.
Hawthorne, F.C. & Harlow, G.E. (2008): The crystal chemistry of Al-rich amphiboles: sadanagaite and potassic-ferrisadanagaite. Canadian Mineralogist, 46, 151-162.
Michiaki Bunno, Hidehiko Shmazaki, Tohru Ozawa: (1984): Sadanagaite and magnesio-sadanagaite, new silica-poor members of calcic amphibole from Japan, American Mineralogist, Volume 69, pages 465-471
CNMMN amphibole subcommittee, Bernard E, Leake (Chairman) et al. (1997): Nomenclature of amphiboles: report of the subcommittee on amphiboles of the International Mineralogical Association, Commission on new minerals and mineral names. The Canadian Mineralogist Vol. 35, pp. 219-246
Frank C. Hawthorne, Roberta Oberti, George E. Harlow, Walter V. Maresch, Robert F. Martin, John C. Schumacer, Mark D. Welch (2012): Nomenclature of the amphibole supergroup, American Mineralogist, Volume 97, pages 2031–2048

Internet Links for MagnesiosadanagaiteHide

 
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