Barrese, Eugenio, Giampaolo, Ciriaco, Grubessi, Odino, Mottana, Annibale (1986) Ranciéite from Mazzano Romano (Latium, Italy) Mineralogical Magazine, 50 (355) 111-118 doi:10.1180/minmag.1986.050.355.14
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | Ranciéite from Mazzano Romano (Latium, Italy) | ||
| Journal | Mineralogical Magazine | ISSN | 0026-461X |
| Authors | Barrese, Eugenio | Author | |
| Giampaolo, Ciriaco | Author | ||
| Grubessi, Odino | Author | ||
| Mottana, Annibale | Author | ||
| Year | 1986 (March) | Volume | 50 |
| Issue | 355 | ||
| Publisher | Mineralogical Society | ||
| Download URL | https://rruff.info/doclib/MinMag/Volume_50/50-355-111.pdf+ | ||
| DOI | doi:10.1180/minmag.1986.050.355.14Search in ResearchGate | ||
| Generate Citation Formats | |||
| Mindat Ref. ID | 3820 | Long-form Identifier | mindat:1:5:3820:5 |
| GUID | 0 | ||
| Full Reference | Barrese, Eugenio, Giampaolo, Ciriaco, Grubessi, Odino, Mottana, Annibale (1986) Ranciéite from Mazzano Romano (Latium, Italy) Mineralogical Magazine, 50 (355) 111-118 doi:10.1180/minmag.1986.050.355.14 | ||
| Plain Text | Barrese, Eugenio, Giampaolo, Ciriaco, Grubessi, Odino, Mottana, Annibale (1986) Ranciéite from Mazzano Romano (Latium, Italy) Mineralogical Magazine, 50 (355) 111-118 doi:10.1180/minmag.1986.050.355.14 | ||
| In | (1986, March) Mineralogical Magazine Vol. 50 (355) Mineralogical Society | ||
| Abstract/Notes | AbstractRanciéite occurs as stalactites coated with 10 Å halloysite in an open fissure crossing the Mazzano Romano Mn-impregnated tuffs. Chemical analysis (by EMPA) gave: MnO2 71.9, CaO 6.11, BaO 2.85, MgO 1.53, K2O 0.86, Na2O 0.53 plus minor oxides, total 85.07% (average of sixteen spots). Thermal analysis gave a total loss of ∼ 20 wt% of which 13.9% can be attributed to bonded water. The resulting formula contains 4H2O rather than 3H2O, as in most published references. The loss of water leads to the formation of hausmannite plus unidentified phases, after a complex sequence of reactions. Dehydration is directly followed by an X-ray amorphous stage. The X-ray pattern and IR spectrum indicate a poor structural order, in agreement with the likely formation conditions of the Mazzano ranciéite at atmospheric pressure and very low temperatures (less than 50 °C), from cold water percolating through the main Mn deposit. | ||
See Also
These are possibly similar items as determined by title/reference text matching only.
