Krasnovite Mineral Data

General Krasnovite Information

Chemical Formula:

Ba(Al,Mg)(PO4,CO3)(OH)2•(H2O)

Composition:

Molecular Weight = 301.90 gm

Barium 45.49 % Ba 50.79 % BaO

Magnesium 2.01 % Mg 3.34 % MgO

Aluminum 6.70 % Al 12.66 % Al₂O₃

Phosphorus 7.69 % P 17.63 % P₂O₅

Hydrogen 1.34 % H 11.93 % H₂O

Carbon 0.99 % C 3.64 % CO₂

Oxygen 35.77 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

BaAl_0.75Mg_0.25(PO₄)_0.75(CO₃)_0.25(OH)₂•(H₂O)

Environment:

Dolomite veins.

IMA Status:

Approved IMA 1996 (Dana # Added)

Locality:

Kovdor on the Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for N. I. Krasnova (1941-), mineralogist at St. Petersburg University.

Name Pronunciation:

Krasnovite + Pronunciation

Synonym:

IMA1991-020

Krasnovite Image

Images:

Krasnovite

Comments: Pastel blue, vitreous massive krasnovite, associated with white ankerite.
Location: Cerro Sapo Carbonatite dike, Cochabamba, Bolivia. Scale: See Image.
© Rruff Database

Krasnovite Crystallography

Axial Ratios:

a:b:c =1.5768:1:1.9532

Cell Dimensions:

a = 8.939, b = 5.669, c = 11.073, Z = 4; V = 561.13 Den(Calc)= 3.57

Crystal System:

Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnna,Pnnn

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

By Intensity(I/I_o): 2.768(1), 3.479(0.82), 5.54(0.79),2.543(0.61),

Physical Properties of Krasnovite

Cleavage:

{010} Good

Color:

Pale blue.

Density:

3.7

Diaphaneity:

Translucent

Fracture:

Fibrous - Thin, elongated fractures produced by crystal forms or intersecting cleavages (e.g. asbestos).

Habit:

Fibrous - Crystals made up of fibers.

Habit:

Spherical - Spherical, rounded aggregates.

Hardness:

2 - Gypsum

Luminescence:

Non-fluorescent.

Luster:

Silky

Streak:

white

Optical Properties of Krasnovite

Gladstone-Dale:

CI meas= 0.048 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.176,KPDmeas= 0.1698,KC= 0.1784
Ncalc = 1.64 - 1.66

Optical Data:

Biaxial (-), a=1.616, b=1.629, g=1.64, bire=0.0240, 2V(Calc)=84, 2V(Meas)=70 -90. Dispersion strong, r > v.

Pleochroism (x):

none.

Pleochroism (y):

none.

Pleochroism (z):

none.

Calculated Properties of Krasnovite

Electron Density:

Bulk Density (Electron Density)=3.30 gm/cc
note: Specific Gravity of Krasnovite =3.57 gm/cc.

Fermion Index:

Fermion Index = 0.08
Boson Index = 0.92

Photoelectric:

PE_Krasnovite= 198.00 barns/electron
U=PE_Krasnovite x rElectron Density= 653.23 barns/cc.

Radioactivity:

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

Krasnovite Classification

Dana Class:

42.07.02.02 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.07)where (AB)5 (XO4)3 Zq ï¿½ x(H2O)

(42.07.02)Foggite Group

42.07.02.01 Foggite CaAl(PO4)(OH)2•(H2O) A2122 2 2 2

42.07.02.02 Krasnovite! Ba(Al,Mg)(PO4,CO3)(OH)2•(H2O) Pnna,Pnnn 2/m 2/m 2/m

Strunz Class:

08.DK.35 08 - PHOSPHATES, ARSENATES, VANADATES

08.D - Phosphates, etc

08.DK -With large and medium-sized cations, (OH, etc.):RO4 > 1:1 and < 2:1

08.DK.35 Krasnovite! Ba(Al,Mg)(PO4,CO3)(OH)2•(H2O) Pnna,Pnnn 2/m 2/m 2/m

Other Krasnovite Information

References:

NAME( MinRec, Vol. 28, No. 3) PHYS. PROP.(Am.Min.,Vol.82,p621,1997) OPTIC PROP.(MinRec, Vol. 28, No. 3)

See Also:

Links to other databases for Krasnovite :
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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Krasnovite

Ba(Al,Mg)(PO4,CO3)(OH)2•(H2O)
Dana No: 42.07.02.02 Strunz No: 08.DK.35
Locality:

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