Santite Mineral Data

Santite Mineral Data
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General Santite Information

Help on Chemical Formula: Chemical Formula: KB5O6(OH)4•2(H2O)
Help on Composition: Composition: Molecular Weight = 293.20 gm
   Potassium  13.33 %  K    16.06 % K2O
   Boron      18.43 %  B    59.36 % B2O3
   Hydrogen    2.75 %  H    24.58 % H2O
   Oxygen     65.48 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: KB5O6(OH)4•2(H2O)
Help on Environment: Environment: Formed in fumaroles, probably a product of reaction between potassium-rich solutions and larderellite
Help on IMA Status: IMA Status: Approved IMA 1970
Help on Locality: Locality: Larderello, Val di Cecina, Tuscany, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Giorgio Santi (1746-1822), Italian chemist and Director, Museum of Natural History, University of Pisa, Pisa, Italy.
Help on Name Pronunciation: Name Pronunciation: Santite Say SANTITE
Help on Synonym: Synonym: ICSD 18211
  PDF 25-624
 

Santite Image

Click Here for Larger Santite Image in a New Browser Window Images:
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Santite   Ramanite-(Rb)   Ramanite-(Cs)

Comments: Unheated Type-B melt inclusions in graphic quartz. 1 = ramanite-(Cs), 2 = sassolite, 3 = ramanite-(Rb), 4 = santite, 5 = topaz, V = vapor. (AmMin, v93:1035).
Location: Graphic pegmatite quartz from the Island of Elba, Italy. Scale: Scale Bar 15µm.
© American Mineralogist

Santite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.9928:1:0.8121
Help on Cell Dimensions: Cell Dimensions: a = 11.1, b = 11.18, c = 9.08, Z = 4; V = 1,126.81 Den(Calc)= 1.73
Help on Crystal System: Crystal System: Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: Aba2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.36(1), 3.52(0.85), 5.6(0.7),
Click Here for Large Santite Structure Window Crystal Structure:

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Zachariasen W H , Zeitschrift fur Kristallographie , 98 (1937) p.266-274, The crystal structure of potassium acid dihydronium, pentaborate KH2(H3O)2B5O10, (potassium pentaborate tetrahydrate), Locality: synthetic

 

Physical Properties of Santite

Help on Color: Color: Colorless.
Help on Density: Density: 1.735
Help on Diaphaneity: Diaphaneity: Transparent
Help on Streak: Streak: white
 

Optical Properties of Santite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.059 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.062 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2576,KPDmeas= 0.2569,KC= 0.2427
Ncalc = 1.42
Help on Optical Data: Optical Data: Biaxial (+), a=1.422, b=1.435, g=1.48, bire=0.0580
 

Calculated Properties of Santite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.75 gm/cc
note: Specific Gravity of Santite =1.74 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PESantite = 1.59 barns/electron
U=PESantite x relectron= 2.79 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 194.22 (Gamma Ray American Petroleum Institute Units)
Concentration of Santite per GRapi unit = 0.51 (%)

Estimated Radioactivity from Santite - barely detectable

 

Santite Classification
Help on Dana Class: Dana Class: 26.05.02.01 (26)Hydrated Borates Containing Hydroxyl or Halogen
  (26.05)Dana Type
  (26.05.02)Santite Group
 
26.05.02.01 Santite KB5O6(OH)4•2(H2O) Aba2 mm2
 
26.05.02.02 Ramanite-(Rb)! Rb[B5O6(OH)4]•2H2O Aba2 mm2
 
26.05.02.03 Ramanite-(Cs)! Cs[B5O6(OH)4]•2H2O C 2/c 2/m
Help on Strunz Class: Strunz Class: 06.EA.10 06 - BORATES
  06.E - Pentaborates
  06.EA -Neso-pentaborates
 
06.EA.10 Santite KB5O6(OH)4•2(H2O) Aba2 mm2
 
06.EA.10 Ramanite-(Rb)! Rb[B5O6(OH)4]•2H2O Aba2 mm2
 
06.EA.10 Ramanite-(Cs)! Cs[B5O6(OH)4]•2H2O C 2/c 2/m
 

Other Santite Information
Help on References: References: NAME( AntBidBlaNic5) 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 Santite :
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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Ask about Santite here :
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Rockhounds Discussion Group on Yahoo Groups
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Print or Cut-and-Paste your Santite Specimen Label here :

Santite

KB5O6(OH)4•2(H2O)
Dana No: 26.05.02.01 Strunz No: 06.EA.10
Locality:

 

Notes: