Oberti, Roberta, Boiocchi, Massimo, Hawthorne, Frank C., Ciriotti, Marco E., Revheim, Olav, Bracco, Roberto (2018) Clino-suenoite, a newly approved magnesium-iron-manganese amphibole from Valmalenco, Sondrio, Italy. Mineralogical Magazine, 82 (1) 189-198 doi:10.1180/minmag.2017.081.034
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | Clino-suenoite, a newly approved magnesium-iron-manganese amphibole from Valmalenco, Sondrio, Italy | ||
| Journal | Mineralogical Magazine | ||
| Authors | Oberti, Roberta | Author | |
| Boiocchi, Massimo | Author | ||
| Hawthorne, Frank C. | Author | ||
| Ciriotti, Marco E. | Author | ||
| Revheim, Olav | Author | ||
| Bracco, Roberto | Author | ||
| Year | 2018 (February) | Volume | 82 |
| Page(s) | 189-198 | Issue | 1 |
| Publisher | Mineralogical Society | ||
| DOI | doi:10.1180/minmag.2017.081.034Search in ResearchGate | ||
| Mindat Ref. ID | 245005 | Long-form Identifier | mindat:1:5:245005:0 |
| GUID | 5340e672-bab0-4499-b2e2-a9f494f65ffa | ||
| Full Reference | Oberti, Roberta, Boiocchi, Massimo, Hawthorne, Frank C., Ciriotti, Marco E., Revheim, Olav, Bracco, Roberto (2018) Clino-suenoite, a newly approved magnesium-iron-manganese amphibole from Valmalenco, Sondrio, Italy. Mineralogical Magazine, 82 (1) 189-198 doi:10.1180/minmag.2017.081.034 | ||
| Plain Text | Oberti, Roberta, Boiocchi, Massimo, Hawthorne, Frank C., Ciriotti, Marco E., Revheim, Olav, Bracco, Roberto (2018) Clino-suenoite, a newly approved magnesium-iron-manganese amphibole from Valmalenco, Sondrio, Italy. Mineralogical Magazine, 82 (1) 189-198 doi:10.1180/minmag.2017.081.034 | ||
| Abstract/Notes | ABSTRACTClino-suenoite, ideally □${\rm Mn}_{2}^{2 +} $Mg5Si8O22(OH)2 is a new amphibole of the magnesium-iron-manganese subgroup of the amphibole supergroup. The type specimen was found at the Lower Scerscen Glacier, Valmalenco, Sondrio, Italy, where it occurs in Mn-rich quartzite erratics containing braunite, rhodonite, spessartine, carbonates and various accessory minerals. The empirical formula derived from electron microprobe analysis and single-crystal structure refinement is: ANa0.04B(${\rm Mn}_{1.58}^{2 +} $Ca0.26Na0.16)Σ2.00C(Mg4.21${\rm Mn}_{0. 61}^{2 +} {\rm Fe}_{0.04}^{2 +} $Zn0.01Ni0.01${\rm Fe}_{0.08}^{3 +} $Al0.04)Σ5.00TSi8.00O22W[(OH1.94F0.06)]Σ=2.00. Clino-suenoite is biaxial (+), with α = 1.632(2), β = 1.644(2), γ = 1.664(2) and 2Vmeas. = 78(2)° and 2Vcalc. = 76.3°. The unit-cell parameters in the C2/m space group are a = 9.6128(11), b = 18.073(2), c = 5.3073(6) Å, β = 102.825(2)° and V = 899.1(2) Å3 with Z = 2. The strongest ten reflections in the powder X-ray diffraction pattern [d (in Å), I, (hkl)] are: 2.728, 100, (151); 2.513, 77, ($\bar 2$02); 3.079, 62, (310); 8.321, 60, (110); 3.421, 54, (131); 2.603, 42, (061); 2.175, 42, (261); 3.253, 41, (240); 2.969, 40, (221); 9.036, 40, (020). | ||
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