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Oxo-magnesio-hastingsite from
Deeti volcanic cone, Monduli District, Arusha Region, Tanzania


09508680017403198894333.jpg
Oxo-magnesio-hastingsite

Deeti volcanic cone, Monduli District, Arusha Region, Tanzania
09508680017403198894333.jpg
Oxo-magnesio-hastingsite

Deeti volcanic cone, Monduli District, Arusha Region, Tanzania
00462080017396511653680.jpg
Oxo-magnesio-hastingsite

Deeti volcanic cone, Monduli District, Arusha Region, Tanzania
Locality type:Volcanic Cone
Classification
Species:Oxo-magnesio-hastingsite
Formula:NaCa2(Mg3(Fe3+2-x,Tix))5(Si6Al2O22)O2
Comments:Up to 12 cm phenocrysts in tuff.

Chemical composition according to Zaitsev et al. (2013): (Na0.67K0.33)Σ1.00(Ca1.87Na0.14Mn0.01)Σ2.02(Mg3.27[b]Fe3+1.25[/b]Ti0.44Al0.08)Σ5.04(Al1.80Si6.20O22)(O1.40OH0.60)Σ2.00
Confirmation
Validity:Valid - Type Locality
Data
Mineral Data:Click here to view Oxo-magnesio-hastingsite data
Locality Data:Click here to view Deeti volcanic cone, Monduli District, Arusha Region, Tanzania
Data Identifiers
Mindat Occurrence Record ID:902405
Long-form Identifier:1:3:902405:2
GUID (UUID V4):0
References
Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2011) New minerals and nomenclature modifications approved in 2011, CNMNC Newsletter No. 10. Mineralogical Magazine, 75 (5) 2549-2561 doi:10.1180/minmag.2011.075.5.2549
Zaitsev, A. N., Avdontseva, E. Yu., Britvin, S. N., Demény, A., Homonnay, Z., Jeffries, T. E., Keller, J., Krivovichev, V. G., Markl, G., Platonova, N. V., Siidra, O. I., Spratt, J., Vennemann, T. (2013) Oxo-magnesio-hastingsite, NaCa2(Mg2Fe3+3 )(Al2Si6)O22O2, a new anhydrous amphibole from the Deeti volcanic cone, Gregory rift, northern Tanzania. Mineralogical Magazine, 77 (6) 2773-2792 doi:10.1180/minmag.2013.077.6.06
 
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