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About EkateriniteHide

Ekaterine V. Rozhkova
Ca2(B4O7)(Cl,OH)2 · 2H2O
white, white with slight rose tint
1 - 1½
Specific Gravity:
Crystal System:
Named in honor of Yekaterine Vladimirovne Rozhkova (Екатерины Владимировны Рожковой) (1898–1979), Russian mineralogist, Research Institute of Mineral Resources, Moscow, Russia.
This page provides mineralogical data about Ekaterinite.

Classification of EkateriniteHide

First published:

H : Unclassified borates
0 :

7 : Miscellaneous

10 : Borates with other anions
1 : Borates with halide

Physical Properties of EkateriniteHide

white, white with slight rose tint
1 - 1½ on Mohs scale
Slightly above 1
2.440(5) g/cm3 (Measured)    

Optical Data of EkateriniteHide

Uniaxial (-)
RI values:
nω = 1.577 nε = 1.574
Max Birefringence:
δ = 0.003
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:

Chemical Properties of EkateriniteHide

Ca2(B4O7)(Cl,OH)2 · 2H2O
IMA Formula:
Ca2B4O7Cl2 · 2H2O

Crystallography of EkateriniteHide

Crystal System:
Cell Parameters:
a = 11.86 Å, c = 23.88 Å
a:c = 1 : 2.013
Unit Cell V:
2,908.94 ų (Calculated from Unit Cell)

Type Occurrence of EkateriniteHide

General Appearance of Type Material:
rose-foliated aggregates
Geological Setting of Type Material:
iron deposit
Associated Minerals at Type Locality:
Malinko, S.V., Kuznetsova, N.N., Cherkasova, L.E. (1980) Ekaterinite, a new boron mineral. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 109(4): 469-476.

Synonyms of EkateriniteHide

Other Language Names for EkateriniteHide


Related Minerals - Nickel-Strunz GroupingHide

6.H0.05ChelkariteCaMgB2O4(Cl,OH)2 · 5H2O Or near, with Cl:OH = 3:1Orth.
6.H0.10Braitschite-(Ce)(Ca,Na2)7(Ce,La)2B22O43 · 7H2OHex.
6.H0.15SatimoliteKNa2(Al5Mg2)[B12O18(OH)12](OH)6Cl4 · 4H2OTrig. 3m (3 2/m) : R3m
6.H0.20IquiqueiteK3Na4Mg(CrO4)B24O39(OH) · 12H2OHex.
6.H0.25WardsmithiteCa5Mg[B4O7]6 · 30H2OHex.
6.H0.35HalurgiteMg4[B8O13(OH)2]2 · 7H2OMon. 2/m : P2/b
6.H0.45VitimiteCa6[B14O19](SO4)(OH)14 · 5H2OMon.
6.H0.50CanavesiteMg2(HBO3)(CO3) · 5H2OMon.
6.H0.55QilianshaniteNaHCO3 · H3BO3 · 2H2OMon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

10.1.1TeepleiteNa2[B(OH)4]ClTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
10.1.2BandyliteCu[B(OH)4]ClTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
10.1.3BerboriteBe2(BO3)(OH,F) · H2OTrig.
10.1.5BoraciteMg3(B7O13)ClOrth. mm2 : Pca21
10.1.7ShabyniteMg5(BO3)(OH)5(Cl,OH)2 · 4H2OMon.
10.1.8/9/10HilgarditeCa2B5O9Cl · H2OTric. 1 : P1
10.1.12HydrochlorboriteCa4B8O15Cl2 · 21H2OMon.
10.1.14VolkovskiteKCa4[B5O8OH]4[B(OH)3]2Cl · 4H2OTric. 1 : P1
10.1.15ChelkariteCaMgB2O4(Cl,OH)2 · 5H2O Or near, with Cl:OH = 3:1Orth.
10.1.16JohachidoliteCaAlB3O7Orth. mmm (2/m 2/m 2/m) : Cmma
10.1.17SatimoliteKNa2(Al5Mg2)[B12O18(OH)12](OH)6Cl4 · 4H2OTrig. 3m (3 2/m) : R3m
10.1.18ChambersiteMn2+3(B7O13)ClOrth. mm2 : Pca21
10.1.19Congolite(Fe2+,Mg)3(B7O13)ClTrig. 3m : R3c

Fluorescence of EkateriniteHide

Bluish luminescence and phosphorescence

Other InformationHide

IR Spectrum:
borehole material [cm-1]: 3570sh, 3550, 3420, 1660w, 1193s, 1123s, 1062s, 1026, 958s, 882, 837w, 784s, 711w, 683w, 620w, 540, 499, 457, 426
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for EkateriniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Malinko, S.V., Kuznetsova, N.N., Cherkasova, L.E. (1980) Ekaterinite, a new boron mineral. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 109(4): 469-476.
Fleischer, M., Pabst, A. (1981) New mineral names. American Mineralogist: 66: 436-439.
Grew, E.S., Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).
Chukanov, N.V. (2014) Infrared spectra of mineral species: Extended library. Springer (Springer Geochemistry/Mineralogy), vol. 1, Dordrecht: 1726 pp.

Internet Links for EkateriniteHide

Localities for EkateriniteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Russia (TL)
  • Irkutsk Oblast
    • Zheleznogorsk (Korshunikha)
Malinko, S.V., Kuznetsova, N.N., Cherkasova, L.E. (1980) Ekaterinite, a new boron mineral. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 109(4): 469-476.; The Mineralogical Record: 32: 500.
Mineral and/or Locality  
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