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Giorgiosite Mineral Data

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General Giorgiosite Information

Help on Chemical  Formula: Chemical Formula: Mg5(CO3)4(OH)2•5(H2O)
Help on Composition: Composition: Molecular Weight = 485.65 gm
   Magnesium  25.02 %  Mg   41.50 % MgO
   Hydrogen    2.49 %  H    22.26 % H2O
   Carbon      9.89 %  C    36.25 % CO2
   Oxygen     62.59 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg5(CO3)4(OH)2•5(H2O)
Help on Environment: Environment: Occurs on the lava. Metastable phase between nesquehonite and hydromagnesite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1905
Help on Locality: Locality: Alphroessa, Santorin, Greece. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for one of the cones, Giorgios, created during the eruption at Santorin islands in 1866.
Help on Name Pronunciation: Name Pronunciation: Giorgiosite + Pronunciation Say GIORGIOSITE

Giorgiosite Image

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Comments: Opaque white nodular giorgiosite.
Location: Alphroessa, Santorini (Thira) Island, Notion Aiyalon, Greece. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Giorgiosite Crystallography

Help on Crystal System: Crystal System: Monoclinic Space Group: ?
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 11.8(1), 3.28(0.7), 3.38(0.7),

Physical Properties of Giorgiosite

Help on Color: Color: White.
Help on Density: Density: 2.155 - 2.185, Average = 2.17
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Streak: Streak: white

Optical Properties of Giorgiosite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.009 (Superior) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.2329,KC= 0.2351
Ncalc = 1.51
Help on Optical Data: Optical Data: Biaxial (?), a=1.498, g=1.513, bire=0.0150

Calculated Properties of Giorgiosite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.22 gm/cc
note: Specific Gravity of Giorgiosite =2.17 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEGiorgiosite = 0.75 barns/electron
U=PEGiorgiosite x rElectron Density= 1.67 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Giorgiosite is Not Radioactive

Giorgiosite Classification

Help on  Dana Class: Dana Class: 16b.07.02.02 (16b)Carbonates - Hydroxyl or Halogen
  (16b.07)Dana Type
  (16b.07.02)Dana Group
16b.07.02.01 Dypingite Mg5(CO3)4(OH)2•5(H2O) Unk. Mono
16b.07.02.02 Giorgiosite Mg5(CO3)4(OH)2•5(H2O) ? Mono
Help on  Strunz Class: Strunz Class: 05.DA.05 05 - CARBONATES (NITRATES)
  05.D - Carbonates with Additional Anions, with H2O
  05.DA -With medium-sized cations
05.DA.05 Dypingite Mg5(CO3)4(OH)2•5(H2O) Unk. Mono
05.DA.05 Giorgiosite Mg5(CO3)4(OH)2•5(H2O) ? Mono
05.DA.05 Hydromagnesite Mg5(CO3)4(OH)2•4(H2O) P 21/c 2/m
05.DA.05 Widgiemoolthalite (Ni,Mg)5(CO3)4(OH)2•4-5(H2O) P 21/c 2/m

Other Giorgiosite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Giorgiosite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: 16b.07.02.02 Strunz No: 05.DA.05





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