Ekaterinite Mineral Data

General Ekaterinite Information

Chemical Formula:

Ca2B4O7(Cl,OH)2•2(H2O)

Composition:

Molecular Weight = 333.11 gm

Calcium 24.06 % Ca 33.67 % CaO

Boron 12.98 % B 41.80 % B₂O₃

Hydrogen 1.36 % H 12.17 % H₂O

Chlorine 15.96 % Cl 15.96 % Cl

- % Cl -3.60 % -O=Cl₂

Oxygen 45.63 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₂B₄O₇Cl_1.5(OH)_0.5•2(H₂O)

Environment:

Calcite and calcite�anhydrite veins associated with a mineralized skarn.

IMA Status:

Approved IMA 1980

Locality:

From drill cores in the Korshunovskoye iron�boron skarn deposit, Irkutsk district, Siberia, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for Yekaterina Vladimirovna Rozhkova (1898-1979), Russian mineralogist, Research Institute of Mineral Resources, Moscow, Russia.

Name Pronunciation:

Ekaterinite + Pronunciation

Ekaterinite Image

Images:

Ekaterinite

Comments: Pale pink crystalline cleavage fragment of ekaterinite.
Location: Novofrolovskoye, Sverdlovsk District, Northern Urals, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ekaterinite Crystallography

Axial Ratios:

a:c = 1:2.01349

Cell Dimensions:

a = 11.86, c = 23.88, Z = 12; V = 2,908.94 Den(Calc)= 2.28

Crystal System:

Hexagonal - Pyramidal H-M Symbol (6) Space Group: C6

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

By Intensity(I/I_o): 1.916(1), 2.31(1), 2.047(0.99),

Physical Properties of Ekaterinite

Color:

Pearl white, Pink.

Density:

2.44

Hardness:

1 - Talc

Luster:

Pearly

Streak:

white

Optical Properties of Ekaterinite

Gladstone-Dale:

CI meas= 0.066 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2524,KPDmeas= 0.2359,KC= 0.2524
Ncalc = 1.58 - 1.62

Optical Data:

Uniaxial (-), e=1.574, w=1.577, bire=0.0030.

Calculated Properties of Ekaterinite

Electron Density:

Bulk Density (Electron Density)=2.27 gm/cc
note: Specific Gravity of Ekaterinite =2.28 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Ekaterinite= 4.15 barns/electron
U=PE_Ekaterinite x rElectron Density= 9.44 barns/cc.

Radioactivity:

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

Ekaterinite Classification

Dana Class:

26.07.03.01 (26)Hydrated Borates Containing Hydroxyl or Halogen

(26.07)Dana Type

(26.07.03)Dana Group

26.07.03.01 Ekaterinite Ca2B4O7(Cl,OH)2•2(H2O) C6 6

Strunz Class:

06.HA.40 06 - BORATES

06.H - Unclassified Borates

06.HA -Unclassified borates

06.HA.40 Ekaterinite Ca2B4O7(Cl,OH)2•2(H2O) C6 6

Other Ekaterinite 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 Ekaterinite :
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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Print or Cut-and-Paste your Ekaterinite Specimen Label here :

Ekaterinite

Ca2B4O7(Cl,OH)2•2(H2O)
Dana No: 26.07.03.01 Strunz No: 06.HA.40
Locality:

Notes:

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