Ekaterinite
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About Ekaterinite
Ekaterine V. Rozhkova
Formula:
Ca2(B4O7)(Cl,OH)2 · 2H2O
Colour:
white, white with slight rose tint
Lustre:
Pearly
Hardness:
1 - 1½
Specific Gravity:
2.440
Crystal System:
Hexagonal
Name:
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 Ekaterinite
Approved
First published:
1980
5/H.12-40
6.H0.40
6 : BORATES
H : Unclassified borates
0 :
6 : BORATES
H : Unclassified borates
0 :
26.7.3.1
26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
7 : Miscellaneous
26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
7 : Miscellaneous
10.1.13
10 : Borates with other anions
1 : Borates with halide
10 : Borates with other anions
1 : Borates with halide
Physical Properties of Ekaterinite
Pearly
Colour:
white, white with slight rose tint
Hardness:
1 - 1½ on Mohs scale
Comment:
Slightly above 1
Density:
2.440(5) g/cm3 (Measured)
Optical Data of Ekaterinite
Type:
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.
and does not take into account mineral colouration.
Surface Relief:
Low
Chemical Properties of Ekaterinite
Formula:
Ca2(B4O7)(Cl,OH)2 · 2H2O
IMA Formula:
Ca2B4O7Cl2 · 2H2O
Crystallography of Ekaterinite
Crystal System:
Hexagonal
Cell Parameters:
a = 11.86 Å, c = 23.88 Å
Ratio:
a:c = 1 : 2.013
Unit Cell V:
2,908.94 ų (Calculated from Unit Cell)
Type Occurrence of Ekaterinite
General Appearance of Type Material:
rose-foliated aggregates
Geological Setting of Type Material:
iron deposit
Associated Minerals at Type Locality:
Reference:
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 Ekaterinite
Other Language Names for Ekaterinite
German:Ekaterinit
Spanish:Ekaterinita
Related Minerals - Nickel-Strunz Grouping
| 6.H0.05 | Chelkarite | CaMgB2O4(Cl,OH)2 · 5H2O Or near, with Cl:OH = 3:1 | Orth. |
| 6.H0.10 | Braitschite-(Ce) | (Ca,Na2)7(Ce,La)2B22O43 · 7H2O | Hex. |
| 6.H0.15 | Satimolite | KNa2(Al5Mg2)[B12O18(OH)12](OH)6Cl4 · 4H2O | Trig. 3m (3 2/m) : R3m |
| 6.H0.20 | Iquiqueite | K3Na4Mg(CrO4)B24O39(OH) · 12H2O | Hex. |
| 6.H0.25 | Wardsmithite | Ca5Mg[B4O7]6 · 30H2O | Hex. |
| 6.H0.35 | Halurgite | Mg4[B8O13(OH)2]2 · 7H2O | Mon. 2/m : P2/b |
| 6.H0.45 | Vitimite | Ca6[B14O19](SO4)(OH)14 · 5H2O | Mon. |
| 6.H0.50 | Canavesite | Mg2(HBO3)(CO3) · 5H2O | Mon. |
| 6.H0.55 | Qilianshanite | NaHCO3 · H3BO3 · 2H2O | Mon. |
Related Minerals - Hey's Chemical Index of Minerals Grouping
| 10.1.1 | Teepleite | Na2[B(OH)4]Cl | Tet. 4/mmm (4/m 2/m 2/m) : P4/nmm |
| 10.1.2 | Bandylite | Cu[B(OH)4]Cl | Tet. 4/mmm (4/m 2/m 2/m) : P4/nmm |
| 10.1.3 | Berborite | Be2(BO3)(OH,F) · H2O | Trig. |
| 10.1.4 | Fluoborite | Mg3(BO3)(F,OH)3 | Hex. |
| 10.1.5 | Boracite | Mg3(B7O13)Cl | Orth. mm2 : Pca21 |
| 10.1.6 | Karlite | Mg7(BO3)3(OH,Cl)5 | Orth. |
| 10.1.7 | Shabynite | Mg5(BO3)(OH)5(Cl,OH)2 · 4H2O | Mon. |
| 10.1.8/9/10 | Hilgardite | Ca2B5O9Cl · H2O | Tric. 1 : P1 |
| 10.1.11 | Solongoite | Ca2(H3B3O7)(OH)Cl | Mon. |
| 10.1.12 | Hydrochlorborite | Ca4B8O15Cl2 · 21H2O | Mon. |
| 10.1.14 | Volkovskite | KCa4[B5O8OH]4[B(OH)3]2Cl · 4H2O | Tric. 1 : P1 |
| 10.1.15 | Chelkarite | CaMgB2O4(Cl,OH)2 · 5H2O Or near, with Cl:OH = 3:1 | Orth. |
| 10.1.16 | Johachidolite | CaAlB3O7 | Orth. mmm (2/m 2/m 2/m) : Cmma |
| 10.1.17 | Satimolite | KNa2(Al5Mg2)[B12O18(OH)12](OH)6Cl4 · 4H2O | Trig. 3m (3 2/m) : R3m |
| 10.1.18 | Chambersite | Mn2+3(B7O13)Cl | Orth. mm2 : Pca21 |
| 10.1.19 | Congolite | (Fe2+,Mg)3(B7O13)Cl | Trig. 3m : R3c |
| 10.1.20 | Ericaite | Fe2+3(B7O13)Cl | Orth. |
Fluorescence of Ekaterinite
Bluish luminescence and phosphorescence
Other Information
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 Ekaterinite
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 Ekaterinite
mindat.org URL:
https://www.mindat.org/min-1362.html
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Localities for Ekaterinite
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Russia (TL) | |
| 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. |
Korshunovskoye iron deposit, Zheleznogorsk, Irkutsk Oblast, Russia