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Giorgiosite

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Formula:
Mg5(CO3)4(OH)2 · 5-6H2O
Colour:
White
Name:
For Giorgios, a volcanic cone on the island of Thera formed in 1866.
Inadequately described.
Compare hydromagnesite.

Classification of Giorgiosite

Questionable/Doubtful
5.DA.05

5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
A : With medium-sized cations
16b.7.2.2

16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
7 : Miscellaneous
11.3.8

11 : Carbonates
3 : Carbonates of Mg
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First Recorded Occurrence of Giorgiosite

Place of Conservation of First Recorded Material:
Natural History Museum, Paris, France.
Year of Discovery:
1879
Geological Setting of First Recorded Material:
In white powdery crusts on lava.
Associated Minerals at First Recorded Locality:

Physical Properties of Giorgiosite

Silky
Diaphaneity (Transparency):
Translucent
Colour:
White
Density:
2.170(15) g/cm3 (Measured)    
Comment:
Synthetic

Crystallography of Giorgiosite

Morphology:
Spherulitic growths in crusts

Optical Data of Giorgiosite

Type:
Biaxial
RI values:
nα = 1.498 nγ = 1.513
Max Birefringence:
δ = 0.015
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
very weak
Optical Extinction:
Positive elongation, parallel extinction

Chemical Properties of Giorgiosite

Formula:
Mg5(CO3)4(OH)2 · 5-6H2O
Essential elements:
All elements listed in formula:

Relationship of Giorgiosite to other Species

5.DA.05DypingiteMg5(CO3)4(OH)2 · 5H2O
5.DA.05HydromagnesiteMg5(CO3)4(OH)2 · 4H2O
5.DA.05WidgiemoolthaliteNi5(CO3)4(OH)2 · 5H2O
5.DA.05UM1986-10-CO:ClHMgMnZnMg5(Zn,Mn)3(CO3)2(OH,Cl)12 · H2O
5.DA.05UM1987-01-CO:HMgSMg4(CO3)2(OH)2 · 6H2O ?
5.DA.10ArtiniteMg2(CO3)(OH)2 · 3H2O
5.DA.10IndigiriteMg2Al2(CO3)4(OH)2 · 15H2O
5.DA.10ChlorartiniteMg2(CO3)(OH)Cl · 2H2O
5.DA.15OtwayiteNi2(CO3)(OH)2 · H2O
5.DA.15ZaratiteNi3(CO3)(OH)4 · 4H2O
5.DA.20KambaldaiteNaNi4(CO3)3(OH)3 · 3H2O
5.DA.25CallaghaniteCu2Mg2(CO3)(OH)6 · 2H2O
5.DA.30Claraite(Cu,Zn)3(CO3)(OH)4 · 4H2O
5.DA.35HydroscarbroiteAl14(CO3)3(OH)36 · nH2O
5.DA.35ScarbroiteAl5(CO3)(OH)13 · 5H2O
5.DA.40CaresiteFe42+Al2(OH)12[CO3] · 3H2O
5.DA.40QuintiniteMg4Al2(OH)12[CO3] · 3H2O
5.DA.40CharmariteMn42+Al2(OH)12[CO3] · 3H2O
5.DA.45Stichtite-2HMg6(Cr,Al)2(CO3)(OH)16 · 4H2O
5.DA.45BrugnatelliteMg6Fe3+(CO3)(OH)13 · 4H2O
5.DA.45ChlormagaluminiteMg4Al2(OH)12Cl2 · 3H2O
5.DA.45Hydrotalcite-2HMg6Al2(CO3)(OH)16 · 4H2O
5.DA.45Pyroaurite-2HMg6Fe23+(OH)16(CO3) · 4H2O
5.DA.45ZaccagnaiteZn4Al2(OH)12[CO3] · 3H2O
5.DA.50ComblainiteNi4Co2(OH)12[CO3] · 3H2O
5.DA.50DesautelsiteMg6Mn23+(OH)16[CO3] · 4H2O
5.DA.50HydrotalciteMg6Al2(OH)16[CO3] · 4H2O
5.DA.50Pyroaurite-3RMg6Fe23+(OH)16[CO3] · 4H2O
5.DA.50ReevesiteNi6Fe23+(OH)16(CO3) · 4H2O
5.DA.50StichtiteMg6Cr2(OH)16[CO3] · 4H2O
5.DA.50TakoviteNi6Al2(OH)16[CO3] · 4H2O
5.DA.50UM1998-10-CO:CoHNiCo6Fe2(CO3)(OH)16 · 4H2O ?
5.DA.55CoalingiteMg10Fe23+(OH)24[CO3] · 2H2O
11.3.1MagnesiteMgCO3
11.3.2BarringtoniteMgCO3 · 2H2O
11.3.3NesquehoniteMgCO3 · 3H2O
11.3.4LansforditeMgCO3 · 5H2O
11.3.5PokrovskiteMg2(CO3)(OH)2
11.3.6ArtiniteMg2(CO3)(OH)2 · 3H2O
11.3.7HydromagnesiteMg5(CO3)4(OH)2 · 4H2O
11.3.9DypingiteMg5(CO3)4(OH)2 · 5H2O
11.3.10EiteliteNa2Mg(CO3)2
11.3.11Mcguinnessite(Mg,Cu)2(CO3)(OH)2

Other Names for Giorgiosite

Name in Other Languages:
German:Giorgiosit
Spanish:Giorgiosita

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Giorgiosite

Reference List:
Fouqué (1879) Santorin e ses éruptions, Paris: 211.

Lacroix (1905) Bulletin de la Société française de Minéralogie: 28: 198.

Lacroix (1905) Comptes rendu de l’Académie des sciences de Paris: 140: 1308.

Zambonini (1922) Neues Jahrbuch für Mineralogie, Geologie und Paleontologie, Heidelberg, Stuttgart: II: 134.

Caillère (1943) Bulletin de la Société française de Minéralogie: 66: 54.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 274.

Raade, G. (1970): Dypingite, a new hydrous bascic carbonate of magnesium, from Norway. American Mineralogist, 55, 1457-1465. [with comments on giorgiosite].

Friedel, B. (1975): Synthetischer Giorgiosit. Neues Jahrbuch für Mineralogie, Monatshefte, 196–208 (in German with English abs.).

Canterford, J.H., G. Tsambourakis, and B. Lambert (1984): Some observations on the properties of dypingite, Mg5(CO3)4(OH)2 •5H2O and related minerals. Mineral. Mag., 48, 437–442.

Internet Links for Giorgiosite

Localities for Giorgiosite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Canada
 
  • Yukon Territory
    • Dawson Mining District
[Mineralogical Record - Vol 23 No.4, pp 37]
Germany
 
  • North Rhine-Westphalia
    • Siegerland
      • Eiserfeld
Henrich, M. (2008): Neues von der Grube Eisenzecher Zug. Mineralien-Welt 19 (5), 16-25.
Greece (FRL)
 
  • Aegean Islands Department (Aiyaíon)
    • Kykládes Prefecture
      • Cyclade Islands (Cyclades; Kikladhes; Nomos Kikladhon)
        • Santorini Island (Thera)
          • Santorini Caldera
            • Nea Kammeni Island
NJMM (1975), 196
Italy
 
  • Trentino-Alto Adige (Trentino-Südtirol)
    • Trento Province
      • Lagarina Valley
        • Mt. Baldo
          • Ala
            • Pilcante
Giorgio Bortolozzi collection (IR analysis)
        • Terragnolo Valley
          • Terragnolo
            • Borcola Pass
Zordan A. (2014): Provincia di Vicenza. In: Zorzi F., Boscardin M. (eds.), Minerali del Veneto. Alla scoperta sei tesori della nostra regione. Museo di Storia Naturale e Archeologia di Montebelluna - Treviso, Cierre Edizioni, Sommacampagna, 173-246.
  • Tuscany
    • Livorno Province
      • Campiglia Marittima
        • Temperino
Biagioni, C., Orlandi, P., Cerri, M., Pistolesi, M., Rapaccini, S. & Santucci, A. (2013). Temperino e Lanzi. Le paragenesi secondarie dello skarn. Rivista Mineralogica Italiana, 1/2013, 40-55.
  • Veneto
    • Belluno Province
      • Auronzo di Cadore
Ara, D., Sanna, L., Rossi, A., Galli, E., & De Waele, J. (2013). Minerali secondari in ambiente sotterraneo: la miniera dell’Argentiera (Sardegna nord-occidentale).
    • Vicenza Province
      • Posina
        • Borcola Pass
Zordan A., Boscardin M. - Aggiornamenti di Mineralogia nel Vicentino. Determinazioni 2006. Studi e Ricerche - Associazione Amici del Museo Civico "G.Zannato", Montecchio Maggiore (Vicenza), 13 (2006), pp. 35-40.
        • Pasubio Massif
          • Punta della Lucche
Zordan A., Boscardin M. - Aggiornenti di mineralogia nel Vicentino. Determinazioni 2006. Studi e Ricerche - Associazione Amici del Museo - Museo Civico "G.Zannato", Montecchio Maggiore (Vicenza), 13 (2006),pp.35-40.
Norway
 
  • Sogn og Fjordane
    • Fjaler
      • Hellevika
Raade, G. (1993): Giorgsite, dypingite and nesquehonite from Sunnfjord. In: Interne notater 1990-1993, Mineralogisk-Geologisk Museum- Universitetet i Oslo. Utgitt av Geologisk Museums Venner 1993, p. 188-189. [Not officially published]
Russia
 
  • Urals Region
    • Southern Urals
      • Chelyabinsk Oblast'
Cesnokov, B., Kotrly, M. and Nisanbajev, T. (1998): Brennende Abraumhalden und Aufschlüsse im Tscheljabinsker Kohlenbecken - eine reiche Mineralienküche. Mineralien-Welt, 9 (3), 54-63 (in German).
USA
 
  • Pennsylvania
    • Carbon Co.
Yale Peabody Museum
Mineral and/or Locality  
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