Ekaterinite Mineral Data

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)

IMA Status:

Approved IMA 1980

Locality:

Link to MinDat.org Location Data.

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 - PyramidalH-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

Optical Data:

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

Calculated Properties of Ekaterinite

Electron Density:

r_electron=2.27 gm/cc
note: r_Ekaterinite=2.28 gm/cc.

Fermion Index

Fermion Index = 0.02637
Boson Index = 0.97363

Photoelectric:

PE_Ekaterinite= 4.15 barns/electron
U=PE_Ekaterinite x r_electron= 9.44 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Ekaterinite is Not Radioactive

Ekaterinite Classification

Dana Class:

26.7.3.1 (26)Hydrated Borates Containing Hydroxyl or Halogen

(26.7)Dana Type

(26.7.3)Dana Group

26.7.3.1 Ekaterinite Ca2B4O7(Cl,OH)2·2(H2O) C6 6

Strunz Class:

V/H.12-40 V - Nitrates, Carbonates and Borates

V/H - Group borates. Planary and tetrahedral groups [B3O5]1- to [B6O10]2-

V/H.12 - Halurgite - Eketerinite series

V/H.12-10 Halurgite Mg2[B4O5(OH)4]2·(H2O) P 2/c 2/m

V/H.12-20 Hungchaoite MgB4O5(OH)4·7(H2O) P1 1

V/H.12-30 Wardsmithite Ca5MgB24O42·30(H2O) Unk Hex

V/H.12-40 Ekaterinite Ca2B4O7(Cl,OH)2·2(H2O) C6 6

Other Ekaterinite Information

References:

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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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

Ekaterinite

Ca2B4O7(Cl,OH)2·2(H2O)
Dana No: 26.7.3.1 Strunz No: V/H.12-40
Locality:

Notes: