Mineralogy Database

Gugiaite Mineral Data

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General Gugiaite Information

Help on Chemical  Formula: Chemical Formula: Ca2BeSi2O7
Help on Composition: Composition: Molecular Weight = 257.33 gm
   Calcium    31.15 %  Ca   43.58 % CaO
   Beryllium   3.50 %  Be    9.72 % BeO
   Silicon    21.83 %  Si   46.70 % SiO2
   Oxygen     43.52 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2Be(Si2O7)
Help on Environment: Environment: In cavities in skarns and melanite adjacent to an alkalic syenite.
Help on IMA Status: IMA Status: Approved IMA 1962
Help on Locality: Locality: Near the village of Gugia, otherwise unlocated in China. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Gugiaite Say GUGIAITE
Help on Synonym: Synonym: ICSD 31234
  PDF 15-199
 

Gugiaite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.67617
Help on Cell Dimensions: Cell Dimensions: a = 7.43, c = 5.024, Z = 2; V = 277.35 Den(Calc)= 3.08
Help on Crystal System: Crystal System: Tetragonal - Scalenohedral H-M Symbol (4 2m) Space Group: P 421m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.765(1), 1.485(0.7), 1.709(0.7),
 

Physical Properties of Gugiaite

Help on Cleavage: Cleavage: {010} Perfect, {001} Distinct, {110} Indistinct
Help on Color: Color: Colorless.
Help on Density: Density: 3.03
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Hardness: Hardness: 3-4 - Calcite-Fluorite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Gugiaite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.04 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.023 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2169,KPDmeas= 0.2205,KC= 0.212
Ncalc = 1.64 - 1.65
Help on Optical Data: Optical Data: Uniaxial (+), w=1.664, e=1.672, bire=0.0080.
 

Calculated Properties of Gugiaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.06 gm/cc
note: Specific Gravity of Gugiaite =3.08 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEGugiaite = 4.70 barns/electron
U=PEGugiaite x rElectron Density= 14.40 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gugiaite is Not Radioactive
 

Gugiaite Classification

Help on  Dana Class: Dana Class: 55.04.02.06 (55)Sorosilicate Si2O7 Groups, Generally with No Additional Anions
  (55.04)with cations in [8] and lower coordination
  (55.04.02)Fresnoite group
 
55.04.02.01 Fresnoite Ba2TiSi2O8 P 4bm 4mm
 
55.04.02.02 Hardystonite Ca2ZnSi2O7 P 421m 4 2m
 
55.04.02.03 Jeffreyite (Ca,Na)2(Be,Al)Si2(O,OH)7 C 2221 2 2 2
 
55.04.02.04 Leucophanite (Na,Ca)2BeSi2(O,OH,F)7 P1 1
 
55.04.02.05 Meliphanite (Ca,Na)2Be[(Si,Al)2O6(F,OH)] I 4 4
 
55.04.02.06 Gugiaite Ca2BeSi2O7 P 421m 4 2m
Help on  Strunz Class: Strunz Class: 09.BB.10 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BB -Si2O7 groups, without non-tetrahedral anions;
 
09.BB.10 Akermanite Ca2MgSi2O7 P 421m 4 2m
 
09.BB.10 Cebollite Ca5Al2(SiO4)3(OH)4 Unk Ortho
 
09.BB.10 Gugiaite Ca2BeSi2O7 P 421m 4 2m
 
09.BB.10 Gehlenite Ca2Al(AlSi)O7 P 421m 4 2m
 
09.BB.10 Jeffreyite (Ca,Na)2(Be,Al)Si2(O,OH)7 C 2221 2 2 2
 
09.BB.10 Hardystonite Ca2ZnSi2O7 P 421m 4 2m
 
09.BB.10 Melilite (Ca,Na)2(Al,Mg,Fe)(Si,Al)2O7 P 421m 4 2m
 
09.BB.10 Okayamalite! Ca2B2SiO7 P 421m 4 2m
 

Other Gugiaite Information

Help on References: References: 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 Gugiaite :
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
15 - WWW-MINCRYST

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Print or Cut-and-Paste your Gugiaite Specimen Label here :

Gugiaite

Ca2BeSi2O7
Dana No: 55.04.02.06 Strunz No: 09.BB.10
Locality:

 

Notes:

 

 
   
 


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