Aluminoceladonite
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| Aluminoceladonite | |
|---|---|
 Heulandite with aluminoceladonite inclusions from Nashik District, Maharashtra, India (Dimensions: 14.8 cm x 10.2 cm x 6.5 cm) | |
| General | |
| Category | Phyllosilicate |
| Formula (repeating unit) | K(Mg,Fe2+)Al(Si4O10)(OH)2 |
| IMA symbol | Acel[1] |
| Strunz classification | 9.EC.15 |
| Dana classification | 71.02.02a.06d |
| Crystal system | Monoclinic |
| Crystal class | 2/m |
| Identification | |
| Color | Colorless when pure, green when ferrous iron-bearing |
| Fracture | Micaceous |
| Optical properties | Biaxial (-) |
| Birefringence | 0.0190-0.0240 |
| References | [2][3] |
Aluminoceladonite is a low-temperature potassium dioctahedral mica mineral which is an end-member in the illite-aluminoceladonite solid solution series. The chemical formula for aluminoceladonite is K(Mg,Fe2+)Al(Si4O10)(OH)2.[4]
Occurrence
Aluminoceladonite is often referred to as a rare mineral, though its actual abundance may be underestimated due to difficulty of identification. Aluminoceladonite, along with other phyllosilicate minerals in the illite-aluminoceladonite solid solution series, has been observed mainly among finely dispersed, mostly inter-layer-deficient, aluminium-rich potassium-dioctahedral mica varieties occurring in sedimentary rocks.[5]
References
- ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
- ^ "Aluminoceladonite: mineral information, data and localities". Retrieved March 18, 2019.
- ^ "Aluminoceladonite mineral data". Retrieved March 18, 2019.
- ^ Drits, Victor A.; Zviagina, Bella. B; McCarty, Douglas K; Salyn, Alfred L. (2010). "Factors responsible for crystal-chemical variations in the solid solutions from illite to aluminoceladonite and from glauconite to celadonite". American Mineralogist. 95 (2–3): 348–361. Bibcode:2010AmMin..95..348D. doi:10.2138/am.2010.3300. S2CID 62881038.
- ^ Zviagina, Bella B.; Drits, Victor A; Środoń, Jan; McCarty, Douglas K.; Dorzhieva, Olga V. (2015). "The illite–aluminoceladonite series: distinguishing features and identification criteria from x-ray diffraction and infrared spectroscopy data". Clays and Clay Minerals. 63 (5): 378–394. Bibcode:2015CCM....63..378Z. doi:10.1346/ccmn.2015.0630504. S2CID 100485107.
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