Mineralogy Database

Sanbornite Mineral Data

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General Sanbornite Information

Help on Chemical  Formula: Chemical Formula: BaSi2O5
Help on Composition: Composition: Molecular Weight = 273.50 gm
   Barium   50.21 %  Ba   56.06 % BaO
   Silicon  20.54 %  Si   43.94 % SiO2
   Oxygen   29.25 %  O
           ______        ______ 
           100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ba(Si2O5)
Help on Environment: Environment: beta-BaSi2O5 is a high temperature phase. Major component of Ba-silicate assemblages at or near fringes of large granite intrusives.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1932
Help on Locality: Locality: Incline sanbornite deposit, Truball Peak, 4 miles WNW of Incline, Mariposa Co, California. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Frank B. Sanborn, (1862-1936), Mineralogist, California Department of Natural Resources.
Help on Name Pronunciation: Name Pronunciation: Sanbornite + Pronunciation Say SANBORNITE
Help on Synonym: Synonym: ICSD 100313
  PDF 26-176
 

Sanbornite Image

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  Muirite   Sanbornite

Comments: Translucent orange crystalline muirite in sanbornite.
Location: Big Creek, Fresno County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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  Sanbornite

Comments: Micaceous sanbornite.
Location: Esquire No. 1 Mine, Big Creek, Fresno County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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  Traskite   Sanbornite

Comments: Orange translucent crystalline traskite in white sanbornite.
Location: Rush Creek, Fresno County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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  Bazirite   Sanbornite

Comments: Clear glassy minute grains of bazinite to 1mm through out matrix of milky-white sanbornite. The bazirite fluoresces light blue.
Location: Snow Cap mine, Rush Creek, Fresno Co., California, USA. Scale: 6.5 x 3 x 2.5cm.
© Tom Loomis / Dakota Matrix

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  Bigcreekite   Gillespite   Sanbornite

Comments: Tiny white, spherical patterns, halo-like crystals of bigcreekite to about 0.5mm and reddish gillespite in a matrix of pale yellowish sanbornite.
Location: Trumbull Peak, Mariposa Co., California, United States. Scale: 2.5 x 2 x 2cm.
© Tom Loomis / Dakota Matrix

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  Alforsite   Titantaramellite   Sanbornite   Celsian

Comments: SEM image showing alforsite (al). Matrix composed by lamellar sanbornite (sa) and granular quartz (q). Rectangular crystal in the upper right corner is titantaramellite (ti) and isometric crystals included in sanbornite are celsian (ce).
Location: Trumbull Peak, near Incline, Mariposa Co., California, USA. Scale: See Image.
© Pavel M. Kartashov

Sanbornite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.602:1:1.7594
Help on Cell Dimensions: Cell Dimensions: a = 4.63, b = 7.69, c = 13.53, Z = 4; V = 481.73 Den(Calc)= 3.77
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pmnb
 

Physical Properties of Sanbornite

Help on Cleavage: Cleavage: {???} Perfect
Help on Color: Color: Colorless, White.
Help on Density: Density: 3.74
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Sanbornite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.004 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.004 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1624,KPDmeas= 0.1637,KC= 0.1632
Ncalc = 1.61 - 1.62
Help on Optical Data: Optical Data: Biaxial (-), a=1.597, b=1.616, g=1.624, bire=0.0270, 2V(Calc)=64, 2V(Meas)=66.
 

Calculated Properties of Sanbornite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.42 gm/cc
note: Specific Gravity of Sanbornite =3.77 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.09
Boson Index = 0.91
Help on Photoelectric: Photoelectric: PESanbornite = 222.81 barns/electron
U=PESanbornite x rElectron Density= 761.70 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Sanbornite is Not Radioactive
 

Sanbornite Classification

Help on  Dana Class: Dana Class: 74.03.04.01 (74)Phyllosilicate Modulated Layers
  (74.03)with joined strips
  (74.03.04)Ba phyllosilicates
 
74.03.04.01 Sanbornite BaSi2O5 Pmnb 2/m 2/m 2/m
 
74.03.04.02 Krauskopfite BaSi2O4(OH)2•2(H2O) P 21/a 2/m
Help on  Strunz Class: Strunz Class: 09.EF.10 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EF -Single nets with 6-membered rings, � other rings
 
09.EF.10 Sanbornite BaSi2O5 Pmnb 2/m 2/m 2/m
 

Other Sanbornite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Larousse des Mineraux,1981) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Sanbornite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - WWW-MINCRYST

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

Sanbornite

BaSi2O5
Dana No: 74.03.04.01 Strunz No: 09.EF.10
Locality:

 

Notes:

 

 
   
 


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