Mineralogy Database

Paracelsian Mineral Data

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General Paracelsian Information

Help on Chemical  Formula: Chemical Formula: BaAl2Si2O8
Help on Composition: Composition: Molecular Weight = 375.46 gm
   Barium    36.58 %  Ba   40.84 % BaO
   Aluminum  14.37 %  Al   27.16 % Al2O3
   Silicon   14.96 %  Si   32.01 % SiO2
   Oxygen    34.09 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: BaAl2Si2O8
Help on Environment: Environment: In a band through shales and sandstones, associated with a metamorphosed manganese deposit (Benallt mine, Wales).
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1905
Help on Locality: Locality: From Candoglia, Valle d'Ossola, Piedmont, Italy. In the Benallt mine, Rhiw, Lleyn Peninsula, Wales. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: A combination of the Greek "para", for near, and the mineral's dimorph, celsian.
Help on Name Pronunciation: Name Pronunciation: Paracelsian + Pronunciation Say PARACELSIAN
Help on Synonym: Synonym: ICSD 27720
  PDF 10-352
 

Paracelsian Image

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  Paracelsian

Comments: Translucent paracelsian crystals on matrix.
Location: Benalt Mine, Rhiw, Carnarvonshire, Gwynedd, Wales. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Paracelsian Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8953:1:0.9475
Help on Cell Dimensions: Cell Dimensions: a = 8.58, b = 9.583, c = 9.08, Z = 4; beta = 90° V = 746.58 Den(Calc)= 3.34
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4(1), 3.8(0.7), 2.99(0.5),
 

Physical Properties of Paracelsian

Help on Cleavage: Cleavage: {110} Indistinct
Help on Color: Color: Colorless, White.
Help on Density: Density: 3.31 - 3.32, Average = 3.31
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Pseudo Orthorhombic - Crystals show an orthorhombic shape.
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luminescence: Luminescence: Non-Fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Paracelsian

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.001 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.008 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1736,KPDmeas= 0.1749,KC= 0.1751
Ncalc = 1.58
Help on Optical Data: Optical Data: Biaxial (-), a=1.5702, b=1.5824, g=1.5869, bire=0.0167
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.
Help on Pleochroism (z): Pleochroism (z): colorless.
 

Calculated Properties of Paracelsian

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.07 gm/cc
note: Specific Gravity of Paracelsian =3.32 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.07
Boson Index = 0.93
Help on Photoelectric: Photoelectric: PEParacelsian = 159.23 barns/electron
U=PEParacelsian x rElectron Density= 489.24 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Paracelsian is Not Radioactive
 

Paracelsian Classification

Help on  Dana Class: Dana Class: 76.01.05.01 (76)Tectosilicate Al-Si Framework
  (76.01)with Al-Si frameworks
  (76.01.05)Paracelsian group
 
76.01.05.01 Paracelsian BaAl2Si2O8 P 21/c 2/m
 
76.01.05.02 Slawsonite (Sr,Ca)Al2Si2O8 P 21/a 2/m
Help on  Strunz Class: Strunz Class: 09.FA.40 09 - SILICATES (Germanates)
  09.F - Tektosilicates without Zeolitic H2O
  09.FA -Tektosilicates without additional non-tetrahedral anions, (Al,B):Si = 1:1
 
09.FA.40 Paracelsian BaAl2Si2O8 P 21/c 2/m
 

Other Paracelsian Information

Help on References: References: NAME( AntBidBlaNic2) 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 Paracelsian :
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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Paracelsian

BaAl2Si2O8
Dana No: 76.01.05.01 Strunz No: 09.FA.40
Locality:

 

Notes:

 

 
   
 


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