Baylissite Mineral Data

Baylissite Mineral Data +

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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)

IMA Status:

Approved IMA 1976

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 200006

PDF 29-1017

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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 - PrismaticH-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.

Diaphaniety:

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

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:

r_electron=2.07 gm/cc
note: r_Baylissite=2.03 gm/cc.

Fermion Index

Fermion Index = 0.00944
Boson Index = 0.99056

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)

Estimated Radioactivity from Baylissite - barely detectable

Baylissite Classification

Dana Class:

15.2.4.1 (15)Hydrated Carbonates

(15.2)where A+m B++n (XO3)p · x(H2O), (m+n):p > 1:1

(15.2.4)Dana Group

15.2.4.1 Baylissite K2Mg(CO3)2·4(H2O) P 2₁/a 2/m

Strunz Class:

V/D.02-40 V - Nitrates, Carbonates and Borates

V/D - Water-bearing carbonates without unfamiliar anions

V/D.02 - Thermonatrite - Chalconatronite series

V/D.02-10 Thermonatrite Na2CO3·(H2O) P ca2₁ mm2

V/D.02-20 Natron Na2CO3·10(H2O) Cc m

V/D.02-30 Trona Na3(CO3)(HCO3)·2(H2O) I2/a 2/m

V/D.02-40 Baylissite K2Mg(CO3)2·4(H2O) P 2₁/a 2/m

V/D.02-50 Pirssonite Na2Ca(CO3)2·2(H2O) F dd2 mm2

V/D.02-60 Gaylussite Na2Ca(CO3)2·5(H2O) I2/a 2/m

V/D.02-70 Chalconatronite Na2Cu(CO3)2·3(H2O) P 2₁/n 2/m

Other Baylissite Information

References:

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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Baylissite

K2Mg(CO3)2·4(H2O)
Dana No: 15.2.4.1 Strunz No: V/D.02-40
Locality:

Notes: