Baricite Mineral Data

Baricite Mineral Data +

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General Baricite Information

Chemical Formula:

(Mg,Fe++)3(PO4)2·8(H2O)

Composition:

Molecular Weight = 430.64 gm

Magnesium 12.70 % Mg 21.06 % MgO

Iron 9.73 % Fe 12.51 % FeO

Phosphorus 14.39 % P 32.96 % P₂O₅

Hydrogen 3.74 % H 33.47 % H₂O

Oxygen 59.44 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mg_2.25Fe²⁺_0.75(PO₄)₂·8(H₂O)

Environment:

Occurs as fracture fillings in sideritic iron formation (Yukon Territory, Canada).

IMA Status:

Approved IMA 1976

Locality:

From the Big Fish River-Rapid Creek area, Yukon Territory, Canada. Link to MinDat.org Location Data.

Name Origin:

Honors Dr. Ljudevit Baric, former Director if the Mineralogical Museum and Professor of Mineralogy, University of Zagreb, Zagreb, Croatia.

Synonym:

ICSD 202099

IMA1975-027

PDF 29-705

Baricite Image

Images:

Baricite

Comments: Blue, micaceous baricite with some yellow iron staining.
Location: Rapid Creek, Yukon Territory, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Baricite Crystallography

Axial Ratios:

a:b:c =0.7509:1:0.3548

Cell Dimensions:

a = 10.075, b = 13.416, c = 4.76, Z = 2; beta = 104.867° V = 621.85 Den(Calc)= 2.30

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

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

By Intensity(I/I_o): 6.71(1), 2.699(0.7), 2.956(0.6),

Crystal Structure:

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Yakubovich O V , Massa W , Liferovich R P , McCammon C A , The Canadian Mineralogist , 39 (2001) p.1317-1324, The crystal structure of baricite, (Mg1.70Fe1.30)(PO4)2.8H2O

Physical Properties of Baricite

Cleavage:

[010] Perfect

Color:

Colorless, Light blue.

Density:

2.42

Diaphaniety:

Transparent

Hardness:

1.5-2 - Talc-Gypsum

Streak:

white

Optical Properties of Baricite

Gladstone-Dale:

CI meas= 0.016 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.036 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2483,KPDmeas= 0.236,KC= 0.2397

Optical Data:

Biaxial (+), a=1.554, b=1.564, g=1.595, bire=0.0410, 2V(Calc)=62, 2V(Meas)=59.

Calculated Properties of Baricite

Electron Density:

r_electron=2.48 gm/cc
note: r_Baricite=2.42 gm/cc.

Fermion Index

Fermion Index = 0.01505
Boson Index = 0.98495

Photoelectric:

PE_Baricite= 3.82 barns/electron
U=PE_Baricite x r_electron= 9.47 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Baricite is Not Radioactive

Baricite Classification

Dana Class:

40.3.6.2 (40)Hydrated Phosphates, etc

(40.3)where (A++)3 (XO4)2 · x(H2O)

(40.3.6)Dana Group

40.3.6.1 Vivianite Fe3(PO4)2·8(H2O) C 2/m 2/m

40.3.6.2 Baricite (Mg,Fe)3(PO4)2·8(H2O) C 2/m 2/m

40.3.6.3 Erythrite Co3(AsO4)2·8(H2O) I2/m 2/m

40.3.6.4 Annabergite Ni3(AsO4)2·8(H2O) I2/m 2/m

40.3.6.5 Kottigite Zn3(AsO4)2·8(H2O) C 2/m 2/m

40.3.6.6 Parasymplesite Fe3(AsO4)2·8(H2O) C 2/m 2/m

40.3.6.7 Hornesite Mg3(AsO4)2·8(H2O) I2/m 2/m

40.3.6.8 Arupite (Ni,Fe)3(PO4)2·8(H2O) I2/m 2/m

40.3.6.9 IMA2004-021! Co3(PO4)2·8(H2O) C 2/m 2/m

Strunz Class:

VII/C.13-30 VII - Phosphates, Arsenates and Vanadates

VII/C - Water-bearing phosphates without unfamiliar anions. cations of medium and small size: Be and Mn, Fe, Cu, Zn, Mg

VII/C.13 - Vivianite group

VII/C.13-10 Bobierrite Mg3(PO4)2·8(H2O) C 2/c 2/m

VII/C.13-20* Cattiite! Mg3(PO4)2·22(H2O) P1 1

VII/C.13-20 Manganese-hornesite (Mn,Mg)3(AsO4)2·8(H2O) P 2₁/c 2/m

VII/C.13-30 Baricite (Mg,Fe)3(PO4)2·8(H2O) C 2/m 2/m

VII/C.13-40 Vivianite Fe3(PO4)2·8(H2O) C 2/m 2/m

VII/C.13-45 Arupite (Ni,Fe)3(PO4)2·8(H2O) I2/m 2/m

VII/C.13-50 Hornesite Mg3(AsO4)2·8(H2O) I2/m 2/m

VII/C.13-60 Parasymplesite Fe3(AsO4)2·8(H2O) C 2/m 2/m

VII/C.13-70 Erythrite Co3(AsO4)2·8(H2O) I2/m 2/m

VII/C.13-80 Annabergite Ni3(AsO4)2·8(H2O) I2/m 2/m

VII/C.13-90 Kottigite Zn3(AsO4)2·8(H2O) C 2/m 2/m

Other Baricite 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 Baricite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 -École des Mines de Paris

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Baricite

(Mg,Fe++)3(PO4)2·8(H2O)
Dana No: 40.3.6.2 Strunz No: VII/C.13-30
Locality:

Notes: