Azoproite Mineral Data

General Azoproite Information

Chemical Formula:

(Mg,Fe++)2(Fe+++,Ti,Mg)BO5

Composition:

Molecular Weight = 186.49 gm

Magnesium 26.98 % Mg 44.74 % MgO

Titanium 9.24 % Ti 15.42 % TiO₂

Iron 14.97 % Fe 5.01 % FeO / 15.84 % Fe₂O₃

Boron 5.91 % B 19.04 % B₂O₃

Oxygen 42.90 % O

______ ______

100.00 % 100.04 % = TOTAL OXIDE

Empirical Formula:

Mg_1.82Fe²⁺_0.13Fe³⁺_0.37Ti_0.36Mg_0.25B_1.02O₅

Environment:

Late-stage mineral in the border zone in magnesian contact-metamorphic rocks associated with syenites

IMA Status:

Approved IMA 1970

Locality:

Tazheran alkalic massif, west of Lake Baikal, eastern Siberia, Russia. Link to MinDat.org Location Data.

Name Origin:

Named from a Russian acronym honoring the Study of Deep Zones of the Earth’s Crust (AZOPRO in Russian) sponsored in 1969 by the International Geological Association.

Name Pronunciation:

Azoproite + Pronunciation

Azoproite Image

Images:

Azoproite

Comments: Black, acicular azoproite in matrix.
Location: Tazheran Massif, Transbaikalia, Irkutsk District, Siberia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Azoproite Crystallography

Axial Ratios:

a:b:c =0.7559:1:0.2457

Cell Dimensions:

a = 9.26, b = 12.25, c = 3.01, Z = 4; V = 341.44 Den(Calc)= 3.63

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pbam

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

By Intensity(I/I_o): 2.57(1), 5.07(0.8), 2.16(0.6),

Physical Properties of Azoproite

Cleavage:

{010} Good, {001} Distinct

Color:

Black.

Density:

3.63

Diaphaneity:

Transparent to Subopaque

Fracture:

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

Hardness:

5.5 - Knife Blade

Luster:

Adamantine

Streak:

gray

Optical Properties of Azoproite

Gladstone-Dale:

CI meas= 0.092 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.092 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2274,KPDmeas= 0.2274,KC= 0.2503
Ncalc = 1.91

Optical Data:

Biaxial (+), a=1.799, b=1.822, g=1.855, bire=0.0560

Calculated Properties of Azoproite

Electron Density:

Bulk Density (Electron Density)=3.54 gm/cc
note: Specific Gravity of Azoproite =3.63 gm/cc.

Fermion Index:

Fermion Index = 0.05
Boson Index = 0.95

Photoelectric:

PE_Azoproite= 6.65 barns/electron
U=PE_Azoproite x rElectron Density= 23.52 barns/cc.

Radioactivity:

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

Azoproite Classification

Dana Class:

24.02.01.03 (24)Borates - Anhydrous

(24.02)where (A)2 BO2 [XO3]

(24.02.01)Ludwigite Group (Space Group: Pbam)

24.02.01.01 Ludwigite Mg2FeBO5 Pbam 2/m 2/m 2/m

24.02.01.02 Vonsenite Fe2FeBO5 Pbam 2/m 2/m 2/m

24.02.01.03 Azoproite (Mg,Fe)2(Fe,Ti,Mg)BO5 Pbam 2/m 2/m 2/m

24.02.01.04 Bonaccordite Ni2FeBO5 Pbam 2/m 2/m 2/m

24.02.01.05 Chestermanite Mg2(Fe,Mg,Al,Sb)BO3O2 Pbam 2/m 2/m 2/m

24.02.01.06 Fredrikssonite Mg2(Mn,Fe)O2(BO3) Pbam 2/m 2/m 2/m

Strunz Class:

06.AB.30 06 - BORATES

06.A - Monoborates

06.AB -BO3, with additional anions; 1(D) + OH, etc.

06.AB.30 Azoproite (Mg,Fe)2(Fe,Ti,Mg)BO5 Pbam 2/m 2/m 2/m

06.AB.30 Bonaccordite Ni2FeBO5 Pbam 2/m 2/m 2/m

06.AB.30 Fredrikssonite Mg2(Mn,Fe)O2(BO3) Pbam 2/m 2/m 2/m

06.AB.30 Ludwigite Mg2FeBO5 Pbam 2/m 2/m 2/m

06.AB.30 Vonsenite Fe2FeBO5 Pbam 2/m 2/m 2/m

Other Azoproite Information

References:

NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Azoproite :
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

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Ask about Azoproite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Azoproite Specimen Label here :

Azoproite

(Mg,Fe++)2(Fe+++,Ti,Mg)BO5
Dana No: 24.02.01.03 Strunz No: 06.AB.30
Locality:

Notes: