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

Environment:

Low-temperature hydrothermal Pb�Zn deposits.

IMA Status:

Approved IMA 1979

Locality:

Minerva No. 1 and Annabel Lee mines, Cave-in-Rock, Hardin Co., Illinois, USA. Link to MinDat.org Location Data.

Name Origin:

Named from the Greek for near and its morphological and chemical relation with alstonite.

Name Pronunciation:

Paralstonite + Pronunciation

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 - Trapezohedral H-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),

Physical Properties of Paralstonite

Color:

Colorless, White.

Density:

3.6

Diaphaneity:

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
Ncalc = 1.6 - 1.62

Optical Data:

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

Calculated Properties of Paralstonite

Electron Density:

Bulk Density (Electron Density)=3.29 gm/cc
note: Specific Gravity of Paralstonite =3.60 gm/cc.

Fermion Index:

Fermion Index = 0.08
Boson Index = 0.92

Photoelectric:

PE_Paralstonite= 204.28 barns/electron
U=PE_Paralstonite x rElectron Density= 672.54 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Paralstonite is Not Radioactive

Paralstonite Classification

Dana Class:

14.02.02.02 (14)Anhydrous Carbonates

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

(14.02.02)Norsethite Group

14.02.02.01 Norsethite BaMg(CO3)2 R 32 3 2

14.02.02.02 Paralstonite BaCa(CO3)2 P 3₂1 3 2

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

Strunz Class:

05.AB.40 05 - CARBONATES (NITRATES)

05.A - Carbonates without additional anions, without H2O

05.AB -Alkali-earth (and other M2+) carbonates

05.AB.40 Olekminskite Sr(Sr,Ca,Ba)(CO3)2 P 3₂1 3 2

05.AB.40 Paralstonite BaCa(CO3)2 P 3₂1 3 2

Other Paralstonite 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 Paralstonite :
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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Print or Cut-and-Paste your Paralstonite Specimen Label here :

Paralstonite

BaCa(CO3)2
Dana No: 14.02.02.02 Strunz No: 05.AB.40
Locality:

Notes:

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