Paralstonite Mineral Data

Paralstonite Mineral Data +

General Paralstonite Information

Chemical Formula:

BaCa(CO3)2

Composition:

Molecular Weight = 297.42 gm

Barium 46.17 % Ba 51.55 % BaO

Calcium 13.48 % Ca 18.85 % CaO

Carbon 8.08 % C 29.59 % CO₂

Oxygen 32.28 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

BaCa(CO₃)₂

IMA Status:

Approved IMA 1979

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 100477

PDF 33-178

Paralstonite Image

Images:

Paralstonite

Comments: Translucent bright white steep pyramidal paralstonite microcrystals on fluorite.
Location: Bethel Level, Minerva #1 Mine, Cave-in-Rock, Hardin County, Illinois, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Paralstonite Crystallography

Axial Ratios:

a:c = 1:0.70731

Cell Dimensions:

a = 8.692, c = 6.148, Z = 3; V = 402.26 Den(Calc)= 3.68

Crystal System:

Trigonal - TrapezohedralH-M Symbol (3 2) Space Group: P 3₂1

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

By Intensity(I/I_o): 3.55(1), 2.51(0.65), 2.048(0.2),

Crystal Structure:

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Effenberger H , Neues Jahrbuch fur Mineralogie, Monatshefte , 1980 (1980) p.353-363, Die kristallstruktur des minerals paralstonite, BaCa(CO3)2, Locality:Cave-in-Rock District, Illinois, USA

Physical Properties of Paralstonite

Color:

Colorless, White.

Density:

3.6

Diaphaniety:

Transparent to Translucent

Hardness:

4-4.5 - Between Fluorite and Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Paralstonite

Gladstone-Dale:

CI meas= 0.009 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.03 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1629,KPDmeas= 0.1665,KC= 0.168

Optical Data:

Uniaxial (-), e=1.527, w=1.672, bire=0.1450.

Calculated Properties of Paralstonite

Electron Density:

r_electron=3.29 gm/cc
note: r_Paralstonite=3.60 gm/cc.

Fermion Index

Fermion Index = 0.08351
Boson Index = 0.91649

Photoelectric:

PE_Paralstonite= 204.28 barns/electron
U=PE_Paralstonite x r_electron= 672.54 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Paralstonite is Not Radioactive

Paralstonite Classification

Dana Class:

14.2.2.2 (14)Anhydrous Carbonates

(14.2)with Compound Formula A+ B++ (CO3)2

(14.2.2)Dana Group

14.2.2.1 Norsethite BaMg(CO3)2 R 32 3 2

14.2.2.2 Paralstonite BaCa(CO3)2 P 3₂1 3 2

14.2.2.3 Olekminskite Sr(Sr,Ca,Ba)(CO3)2 P 3₂1 3 2

Strunz Class:

V/B.04-70 V - Nitrates, Carbonates and Borates

V/B - Waterfree carbonates [CO3]2- without unfamiliar anions

V/B.04 - Aragonite group

V/B.04-10 Aragonite CaCO3 Pmcn 2/m 2/m 2/m

V/B.04-20 Strontianite SrCO3 Pmcn 2/m 2/m 2/m

V/B.04-30 Witherite BaCO3 Pmcn 2/m 2/m 2/m

V/B.04-40 Cerussite PbCO3 Pmcn 2/m 2/m 2/m

V/B.04-50 Alstonite BaCa(CO3)2 P1 or P1 Tri

V/B.04-60 Barytocalcite BaCa(CO3)2 P 2₁ 2

V/B.04-65 Olekminskite Sr(Sr,Ca,Ba)(CO3)2 P 3₂1 3 2

V/B.04-70 Paralstonite BaCa(CO3)2 P 3₂1 3 2

Other Paralstonite 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 Paralstonite :
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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Paralstonite

BaCa(CO3)2
Dana No: 14.2.2.2 Strunz No: V/B.04-70
Locality:

Notes: