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Val d'Ala

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Journal Article
Published: 01 February 2001
The Canadian Mineralogist (2001) 39 (1): 145–151.
...Mario Tribaudino; Mauro Prencipe Abstract High-pressure in situ powder-diffraction data were collected on a sample of P 4/ n vesuvianite from Val d’Ala, Piemonte, Italy, between room pressure and 13.2 GPa. No deviation from tetragonal symmetry was found at any pressure. The refined unit-cell...
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Journal Article
Published: 01 December 1999
European Journal of Mineralogy (1999) 11 (6): 1037–1042.
...Mario Tribaudino; Mauro Prencipe Abstract Single crystal X-ray diffraction data were collected at T = 570, 770, 1070 K on a sample of a P4/n vesuvianite from Val d'Ala (Piedmont, Italy). Structure refinements yielded R values of 6.7, 6.8 and 8.5% for the three temperatures, respectively; the P4/n...
Journal Article
Published: 28 November 2022
Mineralogical Magazine (2023) 87 (2): 204–217.
..., more than 570 different mineral species found in Piedmont and Aosta Valley are described. Finally, Gian Carlo Piccoli is co-author of the book “ Minerali in Val d'Ala ” (Maletto and Piccoli, 2014 ). The mineral and its name (symbol Pcc) were approved by the Commission on New Minerals, Nomenclature...
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Journal Article
Published: 01 July 2007
European Journal of Mineralogy (2007) 19 (4): 581–587.
... , A. & Bettendorff , A. ( 1873 ): Ardennit, ein neues Mineral . Ann. Phys. Chem ., 149 , 241 – 251 . Zambonini , F. ( 1922 ): Ardennite di Ceres, in Val d’Ala (Piemonte) . Rend. R. Acc. Naz. Lincei, Ser. 5 , 31 , 147 – 151 . Table 2. Chemical data (average of 9 analyses...
FIGURES
Journal Article
Published: 16 November 2020
Mineralogical Magazine (2020) 84 (6): 888–899.
... of runs (2) and (3), are characterised by ~ 40–50% Fe 2+ oxidation. It is worth noting that Giacobbe et al. ( 2018 ) reported a very different behaviour for a sample of fibrous tremolite from Val d'Ala, Turin, Italy. The sample characterised by the chemical formula (Ca 1.91 Na 0.06 K 0.01 ) Σ1.98...
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Journal Article
Published: 01 May 2006
American Mineralogist (2006) 91 (5-6): 862–870.
... that Fe 2+ [e.g., Totalp (2), Stalvader (3), Val d’Ala (10)] or Fe 3+ (e.g., Bela) ( Armbruster and Gnos 2000b ) in B-free or B-bearing vesuvianites produces green hues, Fe-poor Mg-Al vesuvianite is yellowish-olive or colorless, and Mn 2+ or Mn 3+ produce pink, orange, and red to black hues (Kalahari...
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Journal Article
Published: 01 June 2004
Mineralogical Magazine (2004) 68 (3): 455–465.
... w 235 s 222 vw 225 s 222 w 226 s 216 s 216 m 212 m 211 m 214 vw,sh 196 w 195 s 188 m 180 s 182 s 182 vs 162 s 164 s 155 s 162 vs The samples of tremolite selected for study are from Brachiello (Val d’Ala...
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Journal Article
Published: 01 October 2021
American Mineralogist (2021) 106 (10): 1606–1621.
...) UICC amosite 9.5(3) 6.1(6)×10 –14 2.7(3)×10 –13 27010(2647) 74(7) UICC anthophyllite asbestos 4.4(2) 1.2(3)×10 –13 1.0(3)×10 –13 83950(20990) 245(64) Val d’Ala tremolite asbestos 9.2(3) 5.4(9)×10 –14 4.5(7)×10 –13 17885(2981) 49(8) UICC crocidolite 16.1(6) 1.3(3)×10 –13...
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Journal Article
Published: 01 February 2002
Mineralogical Magazine (2002) 66 (1): 137–150.
... and neutron diffraction study Pavese et al. (1998) have shown that in a P 4/ n vesuvianite from Val d’Ala (Italy) the square pyramidal Y ′ site is occupied by Fe 3+ . The examples above demonstrate that the vesuvianite group is much more complex than hitherto assumed, requiring definition of new...
FIGURES
Journal Article
Published: 01 October 2014
Italian Journal of Geosciences (2014) 133 (3): 409–426.
... zones . Geochim. Cosmochim. Acta , 67 , 2173 – 2187 . Sandrone R. Leardi L. Rossetti P. Compagnoni R. ( 1986 ) - P-T conditions for the eclogitic re-equilibration of the metaophiolites from the Val d’Ala di Lanzo (internal Piemontese zone, Western Alps) . J. Metam. Geol. , 4...
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Journal Article
Published: 01 March 2000
American Mineralogist (2000) 85 (3-4): 563–569.
... A in Fig. 1 ) with X′4b and Y′3b (string B in Fig. 1 ) hosting the remaining 16%. Twinning and long-range ordering are thus very similar to the Val d’Ala (Piemonte, Italy) sample ( Pavese et al. 1998 ). The fivefold-coordinated Y′3a site is occupied by atoms with an average number of 23 electrons (e.g., Fe...
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Journal Article
Published: 01 January 2001
American Mineralogist (2001) 86 (1-2): 80–91.
..., prismatic single crystals, translucent amber color Langer and Raith (1974) CH Chiampernotto, Val d’Ala (Italy) P. Bonazzi 0.2–0.5 cm opaque, pinkish anhedral crystals Bonazzi and Menchetti (1995) Hu 94-3 Prägratten, Tirol Humboldt Museum, Berlin masses of opaque, pinkish crystals up to 1 cm...
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Journal Article
Published: 01 February 2014
Bulletin de la Société Géologique de France (2014) 185 (2): 93–114.
... ). – Ardennite di Ceres in Val d’Ala . – Rend. Accad. Naz. Lincei (Roma) , 31 , 147 – 151 . Zanoni D. Spalla M.I. Gosso G. ( 2010 ). – Structure and PT estimates across late-collisional plutons: constraints on the exhumation of western Alpine continental HP units . – International Geology...
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Series: European Mineralogical Union Notes in Mineralogy
Publisher: European Mineralogical Union
Published: 01 January 2017
EISBN: 9780903056663
... refinements. In a recent work, Bloise et al . (2016a) showed that trace metals such as Mn (>1000 ppm), Co (27 ppm) and Ni (473 ppm) in tremolite asbestos from Val d’Ala (Italy) were present in large amounts. This finding is in line with the results of Upreti et al . (1984) who analysed tremolite...
Series: European Mineralogical Union Notes in Mineralogy
Publisher: European Mineralogical Union
Published: 01 January 2017
EISBN: 9780903056663
...-111-3) from Koegas Mine, Northern Cape (South Africa); and (4) fibrous tremolite from Val d’Ala, Turin (Italy). In amosite, a pre-edge peaks centroid position of 7113.17 eV and total area of 0.044 indicate predominance of Fe 2+ hosted in an octahedral position only (Table 1 and Fig. 1 ). EXAFS...
Journal Article
Published: 01 January 2002
Reviews in Mineralogy and Geochemistry (2002) 50 (1): 1–76.
... ; Falotta, Cavradi and Val Ferrera, Graubünden, Switzerland; Sailauf, Spessart, Germany Hansen et al. (1984a , b) ; Graeser (1995) ; Kolitsch (1996b) ; Brugger & Gieré (1999) Bertrandite (see note; cf. gelbertrandite, sphaerobertrandite)
 Orthorhombic
 Be 4 Si 2 O 7 (OH) 2 Granite...
FIGURES
Series: European Mineralogical Union Notes in Mineralogy
Publisher: European Mineralogical Union
Published: 01 January 2017
EISBN: 9780903056663
... and asbestiform tremolite from Val d’Ala (NW Italian Alps) have been evaluated by in vitro tests using lung alveolar epithelial A549 (human pulmonary type II-like cancer cell line), mesothelial MeT-5A (SV40-immortalized human mesothelial cell line) and the mouse monocyte-macrophage J774 cell line ( Fenoglio et...
Series: European Mineralogical Union Notes in Mineralogy
Publisher: European Mineralogical Union
Published: 01 January 2017
EISBN: 9780903056663
... of the (100) planes has been observed for asbestiform minerals (excluding those with curved habit), whereas their massive counterparts show a less pronounced orientation ( Bandli and Gunter, 2014 ). Figure 12. Macrophotograph of tremolite asbestos from Val d’Ala (Piemonte Region, Italy). Bundles...
Series: European Mineralogical Union Notes in Mineralogy
Publisher: European Mineralogical Union
Published: 01 January 2017
EISBN: 9780903056663
..., Bloise et al . (2016) showed – through DSC thermal analysis – that the breakdown of tremolite asbestos from Val d’Ala (Italy) occurred at 1046°C. The temperature range of tremolite breakdown for the different above-mentioned samples was 1046–1125°C. Using characterizations of the reacted samples...