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5 - 6
Crystal System:
Originally named mangan-cummingtonite in 1966 by Hugo Strunz in allusion to its composition, containing MANGANese, and its relationship to cummingtonite.
In order to better distinguish between amphibole end-member member compositions, the CNMNC has decided to rename manganocummingtonite. The name is not yet (November 2012) decided. In 2016 clino-suenoite was approved and appears to replace manganocummingtonite.
A synonym of Clino-suenoite
Amphibole Group. Mg-Fe-Mn-Li Clino-Amphibole Subgroup.

Many "tirodites" described in the literature are in fact manganocummingtonite.

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References for ManganocummingtoniteHide

Reference List:
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Chakraborty, K.L. (1963) Relationship of anthophyllite, cummingtonite and mangano-cummingtonite in the metamorphosed Wabush iron-formation, Labrador. The Canadian Mineralogist: 7: 738-750.
Dasgupta, S., Bhattacharya, P.K., Chattopadhyay, G., Banerjee, H., Majumdar, N., Fukuoka, M., Roy, S. (1988) Petrology of Mg-Mn amphibole-bearing assemblages in manganese silicate rocks of the Sausar Group, India. Mineralogical Magazine: 52: 105-111.
Mandarino, J.A. (1998) The Second List of Additions and Corrections to the Glossary of Mineral Species (1995). The Amphibole Group. Mineralogical Record: 29: 169-174.
Leake, B.E., Woolley, A.R., Arps, C.E.S., Birch, W.D., Gilbert, M.C., Grice, J.D., Hawthorne, F.C., Kato, A., J.Kisch, H.J.., G. Krivovichev, V.G., Linthout, K., Laird, J., Mandarino, J.A., Maresch, W.V., Nickel, E.H., Rock, N.M.S., Schumacher, J.C., Smith, D.C., Stephenson, N.C.N., Ungaretti, L., Whittaker, E.J.W., Guo, Y. (1997) Nomenclature of amphiboles of the International Mineralogical Association, Commission on New Minerals and Mineral Names. American Mineralogist: 82: 1019-1037.
Hawthorne, F.C., Oberti, R. (2006) On the classification of amphiboles. The Canadian Mineralogist: 44: 1-21.
Hawthorne, F.C., Oberti, R., Harlow, G.E., Maresch, W.V., Martin, R.F., Schumacher, J.C., Welch, M.D. (2012) Nomenclature of the amphibole supergroup. American Mineralogist: 97: 2031-2048. [discreditation]
Kanungo, D.R., Malpe, D.B., Leake, B.E. (2014) Manganocummingtonite from the Mesoproterozoic, Sausar fold belt, central India. Journal of the Geological Society of India: 83: 93-99.
Oberti, R., Boiocchi, M., Hawthorne, F.C., Ciriotti, M.E., Revheim, O., Bracco, R. (2017): Clino-suenoite, a newly approved magnesium-iron-manganese amphibole from Valmalenco, Sondrio, Italy. Mineralogical Magazine: 81 (in press)

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