Paracelsian Mineral Data (original) (raw)

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 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 - PrismaticH-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),

Click Here for Large Paracelsian Structure Window Crystal Structure:

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Help on Above

| | Phillips M W , Kroll H , Pentinghaus H , Ribbe P H , American Mineralogist , 60 (1975) p.659-666, The structures of synthetic paracelsian analogs, SrGa2Si2O8 and SrGa2Ge2O8 View Additional jPOWD Structure files for Paracelsian [1] [2] [3] [4] | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

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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Ask about Paracelsian here :
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Print or Cut-and-Paste your Paracelsian Specimen Label here :

Paracelsian

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

Notes: