Berzeliite Mineral Data

General Berzeliite Information

Chemical Formula:

(Ca,Na)3(Mg,Mn)2(AsO4)3

Composition:

Molecular Weight = 588.10 gm

Sodium 2.93 % Na 3.95 % Na₂O

Calcium 15.33 % Ca 21.45 % CaO

Magnesium 6.20 % Mg 10.28 % MgO

Manganese 4.67 % Mn 6.03 % MnO

Arsenic 38.22 % As 58.62 % As₂O₅

Oxygen 32.65 % O

______ ______

100.00 % 100.34 % = TOTAL OXIDE

Empirical Formula:

Ca_2.25Na_0.75Mg_1.5Mn²⁺_0.5(AsO₄)₃

Environment:

In metamorphosed Fe-Mn orebodies.

IMA Status:

Valid Species (Pre-IMA) 1840

Locality:

In Sweden, found at Langban and Nordmark, Varmland, and in the Sjo mine, near Grythyttan, Orebro. Link to MinDat.org Location Data.

Name Origin:

In honor of the noted Swedish chemist and mineralogist, Jons Jacob Berzelius (1779-1848).

Name Pronunciation:

Berzeliite + Pronunciation

Synonym:

ICSD 27682

PDF 19-165

Berzeliite Image

Images:

Berzeliite

Comments: White calcite with included grains of yellowish-orange berzeliite in matrix.
Location: Langban, Filipstad, Varmland, Sweden. Scale: 3 x 2.2 cm.
© John Veevaert

Berzeliite Crystallography

Cell Dimensions:

a = 12.405, Z = 8; V = 1,908.93 Den(Calc)= 4.09

Crystal System:

Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: I a3d

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

By Intensity(I/I_o): 2.75(1), 1.65(0.7), 1.71(0.7),

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Forms: ( 1 2 1) ( 0 1 2) ( 0 1 1) ( 1 0 0)

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Physical Properties of Berzeliite

Cleavage:

None

Color:

Orange, Sulfur yellow.

Density:

4.08

Diaphaneity:

Transparent to Translucent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Hardness:

4.5-5 - Near Apatite

Luster:

Resinous

Streak:

white

Optical Properties of Berzeliite

Gladstone-Dale:

CI meas= 0.033 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.035 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1736,KPDmeas= 0.174,KC= 0.18
Ncalc = 1.73 - 1.74

Optical Data:

Isotropic, n=1.71.

Calculated Properties of Berzeliite

Electron Density:

Bulk Density (Electron Density)=3.87 gm/cc
note: Specific Gravity of Berzeliite =4.08 gm/cc.

Fermion Index:

Fermion Index = 0.0065628816
Boson Index = 0.9934371184

Photoelectric:

PE_Berzeliite= 29.48 barns/electron
U=PE_Berzeliite x rElectron Density= 114.01 barns/cc.

Radioactivity:

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

Berzeliite Classification

Dana Class:

38.02.01.01 (38)Anhydrous Phosphates, etc

(38.02)(A+ B++)5 (XO4)3

(38.02.01)Berzeliite Group

38.02.01.01 Berzeliite (Ca,Na)3(Mg,Mn)2(AsO4)3 I a3d 4/m 3 2/m

38.02.01.02 Manganberzeliite (Ca,Na)3(Mn,Mg)2(AsO4)3 I a3d 4/m 3 2/m

38.02.01.03 Palenzonaite (Ca,Na)3Mn(V,As,Si)3O12 I a3d 4/m 3 2/m

38.02.01.04 Schaferite! NaCa2Mg2(VO4)3 I a3d 4/m 3 2/m

Strunz Class:

08.AC.25 08 - PHOSPHATES, ARSENATES, VANADATES

08.A - Phosphates, etc. without additional anions, without H2O

08.AC -With medium-sized and large cations

08.AC.25 Berzeliite (Ca,Na)3(Mg,Mn)2(AsO4)3 I a3d 4/m 3 2/m

08.AC.25 Palenzonaite (Ca,Na)3Mn(V,As,Si)3O12 I a3d 4/m 3 2/m

08.AC.25 Manganberzeliite (Ca,Na)3(Mn,Mg)2(AsO4)3 I a3d 4/m 3 2/m

08.AC.25 Schaferite! NaCa2Mg2(VO4)3 I a3d 4/m 3 2/m

Other Berzeliite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Berzeliite :
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 - Scandinavian mineral gallery
16 - WWW-MINCRYST

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Berzeliite

(Ca,Na)3(Mg,Mn)2(AsO4)3
Dana No: 38.02.01.01 Strunz No: 08.AC.25
Locality:

Notes:

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