Baylissite Mineral Data

General Baylissite Information

Chemical Formula:

K2Mg(CO3)2•4(H2O)

Composition:

Molecular Weight = 294.58 gm

Potassium 26.55 % K 31.98 % K₂O

Magnesium 8.25 % Mg 13.68 % MgO

Hydrogen 2.74 % H 24.46 % H₂O

Carbon 8.15 % C 29.88 % CO₂

Oxygen 54.31 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

K₂Mg(CO₃)₂•4(H₂O)

Environment:

Secondary mineral in fractures in aplite granite and granodiorite.

IMA Status:

Approved IMA 1976

Locality:

Gerstenegg-Sommerloch cable tunnel, north of the Grimsel Pass, Bern, Switzerland. Link to MinDat.org Location Data.

Name Origin:

Named for Noel Stanley Bayliss, Professor of Chemistry, University of Western Australia, Nedlands, Western Australia, who characterized the synthetic compound.

Name Pronunciation:

Baylissite + Pronunciation

Synonym:

ICSD 200006

PDF 29-1017

Baylissite Crystallography

Axial Ratios:

a:b:c =1.9823:1:1.0993

Cell Dimensions:

a = 12.37, b = 6.24, c = 6.86, Z = 2; beta = 114.5° V = 481.84 Den(Calc)= 2.03

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2₁/a

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.01(1), 2.98(0.9), 6.31(0.8),

Physical Properties of Baylissite

Color:

Colorless.

Diaphaneity:

Transparent

Streak:

white

Optical Properties of Baylissite

Gladstone-Dale:

CI calc= -0.032 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2438,KC= 0.2363
Ncalc = 1.48

Optical Data:

Biaxial (-), a=1.465, b=1.485, g=1.535, bire=0.0700, 2V(Calc)=68, 2V(Meas)=64.

Calculated Properties of Baylissite

Electron Density:

Bulk Density (Electron Density)=2.07 gm/cc
note: Specific Gravity of Baylissite =2.03 gm/cc.

Fermion Index:

Fermion Index = 0.0094443671
Boson Index = 0.9905556329

Photoelectric:

PE_Baylissite= 2.95 barns/electron
U=PE_Baylissite x r_electron= 6.09 barns/cc.

Radioactivity:

GRapi = 390.05 (Gamma Ray American Petroleum Institute Units)
Concentration of Baylissite per GRapi unit = 0.26 (%)

Estimated Radioactivity from Baylissite - barely detectable

Baylissite Classification

Dana Class:

15.02.04.01 (15)Hydrated Carbonates

(15.02)where A+m B++n (XO3)p ï¿½ x(H2O), (m+n):p > 1:1

(15.02.04)Dana Group

15.02.04.01 Baylissite K2Mg(CO3)2•4(H2O) P 2₁/a 2/m

Strunz Class:

05.CB.45 05 - CARBONATES (NITRATES)

05.C - Carbonates without Additional Anions, with H2O

05.CB -With large cations (alkali and alkali-earth carbonates)

05.CB.45 Baylissite K2Mg(CO3)2•4(H2O) P 2₁/a 2/m

Other Baylissite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Baylissite :
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

Search for Baylissite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Baylissite :

Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.

Ask about Baylissite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Baylissite

K2Mg(CO3)2•4(H2O)
Dana No: 15.02.04.01 Strunz No: 05.CB.45
Locality:

Notes: