Barytocalcite Mineral Data

General Barytocalcite 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:

Valid Species (Pre-IMA) 1824

Locality:

Link to MinDat.org Location Data.

Name Origin:

Named from its chemical composition.

Name Pronunciation:

Barytocalcite + Pronunciation

Synonym:

ICSD 36201

PDF 15-285

Barytocalcite Image

Images:

Barytocalcite

Comments: Pale pink crystalline barytocalcite in dark matrix.
Location: Langban, Varmland, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Barytocalcite

Comments: White prismatic barytocalcite crystals to 6mm. Former Eaton Collection.
Location: Alston Moor, Cumberland, England. Scale: 3x2x2cm.
© Tom Loomis / Dakota Matrix

Barytocalcite Crystallography

Axial Ratios:

a:b:c =1.5555:1:1.252

Cell Dimensions:

a = 8.134, b = 5.229, c = 6.547, Z = 2; beta = 73.867° V = 267.50 Den(Calc)= 3.69

Crystal System:

Monoclinic - SphenoidalH-M Symbol (2) Space Group: P 2₁

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

By Intensity(I/I_o): 3.125(1), 3.14(0.9), 4.018(0.4),

Crystal Structure:

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Alm K F , Arkiv for Mineralogi och Geologi , 2 (1960) p.399-410, The crystal structure of barytocalcite BaCa(CO3)2

Physical Properties of Barytocalcite

Cleavage:

{110} Perfect, {101} Perfect, {001} Distinct

Color:

White, Yellow, Gray, Greenish gray.

Density:

3.64 - 3.66, Average = 3.65

Diaphaneity:

Transparent to translucent

Fracture:

Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.

Habit:

Druse - Crystal growth in a cavity which results in numerous crystal tipped surfaces.

Habit:

Massive - Granular - Common texture observed in granite and other igneous rock.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

4 - Fluorite

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Resinous

Streak:

white

Optical Properties of Barytocalcite

Gladstone-Dale:

CI meas= -0.03 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.019 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1712,KPDmeas= 0.1731,KC= 0.168
Ncalc = 1.61 - 1.62

Optical Data:

Biaxial (-), a=1.525, b=1.684, g=1.686, bire=0.1610, 2V(Calc)=10, 2V(Meas)=15. Dispersion relatively weak.

Calculated Properties of Barytocalcite

Electron Density:

Bulk Density (Electron Density)=3.37 gm/cc
note: Specific Gravity of Barytocalcite =3.69 gm/cc.

Fermion Index:

Fermion Index = 0.08
Boson Index = 0.92

Photoelectric:

PE_{Barytocalcite}= 204.28 barns/electron
U=PE_{Barytocalcite} x rElectron Density= 689.36 barns/cc.

Radioactivity:

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

Barytocalcite Classification

Dana Class:

14.02.06.01 (14)Anhydrous Carbonates

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

(14.02.06)Dana Group

14.02.06.01 Barytocalcite BaCa(CO3)2 P 2₁ 2

Strunz Class:

05.AB.45 05 - CARBONATES (NITRATES)

05.A - Carbonates without additional anions, without H2O

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

05.AB.45 Barytocalcite BaCa(CO3)2 P 2₁ 2

Other Barytocalcite Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)

See Also:

Links to other databases for Barytocalcite :
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 Barytocalcite Specimen Label here :

Barytocalcite

BaCa(CO3)2
Dana No: 14.02.06.01 Strunz No: 05.AB.45
Locality:

Notes: