Gazeevite
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About Gazeevite
Formula:
BaCa6(SiO4)2(SO4)2O
Colour:
Colourless
Lustre:
Vitreous
Hardness:
4½
Specific Gravity:
3.39 (Calculated)
Crystal System:
Trigonal
Name:
In honor of Dr. Viktor Magalimovich Gazeev (b. 1954), research staff-member of Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry Russian Academy of Sciences (IGEM RAS), Moscow and of Vladikavkaz Scientific Center of the Russian Academy of Sciences, Vladikavkaz, Republic of North Ossetia-Alania, Russia. He is the discoverer of unique xenoliths within the Upper Chegem Caldera (Gazeev et al., 2006), where more than 20 new mineral species were discovered, co-authored by him.
Co-Type Localities:
ⓘ W slope, Har Parsa (Mt. Parsa), Hatrurim (Hatrurim Basin), Hatrurim Formation, Negev, Israel
ⓘ Jebel Harmun (Jabel Harum), Hatrurim Formation, West Bank, Palestine
ⓘ Nahal Darga, Hatrurim Formation, West Bank, Palestine
ⓘ NW slope, Shadil-Khokh volcano, Kel’ volcanic area, Greater Caucasus Mountain Range, South Ossetia
ⓘ Jebel Harmun (Jabel Harum), Hatrurim Formation, West Bank, Palestine
ⓘ Nahal Darga, Hatrurim Formation, West Bank, Palestine
ⓘ NW slope, Shadil-Khokh volcano, Kel’ volcanic area, Greater Caucasus Mountain Range, South Ossetia
One of a few Ba-Ca silicate-sulfate minerals, especially similar to dargaite and somewhat to wenkite. Structurally related to nabimusaite group (e.g., zadovite).
The structure is of modular-layered type, derived from that of hatrurite. More specifically, it has single (broken) antiperovskite layers [WB6](TO4)2 and is of gazeevite-zadovite type.
The structure is of modular-layered type, derived from that of hatrurite. More specifically, it has single (broken) antiperovskite layers [WB6](TO4)2 and is of gazeevite-zadovite type.
Classification of Gazeevite
Physical Properties of Gazeevite
Vitreous
Transparency:
Transparent
Colour:
Colourless
Streak:
White
Hardness:
4½ on Mohs scale
Hardness:
VHN50=417 kg/mm2 - Vickers
Comment:
ca. 4.5.
Tenacity:
Brittle
Cleavage:
Imperfect/Fair
(001)
(001)
Parting:
Pronounced
Density:
3.39 g/cm3 (Calculated)
Optical Data of Gazeevite
Type:
Uniaxial (-)
RI values:
nω = 1.640() nε = 1.636(2)
Max Birefringence:
δ = 0.004
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:
Moderate
Pleochroism:
Non-pleochroic
Chemical Properties of Gazeevite
Formula:
BaCa6(SiO4)2(SO4)2O
Crystallography of Gazeevite
Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
R3m
Setting:
R3m
Cell Parameters:
a = 7.1540(1) Å, c = 25.1242(5) Å
Ratio:
a:c = 1 : 3.512
Unit Cell V:
1,113.58 ų (Calculated from Unit Cell)
Z:
3
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 6.015 | (36) |
| 3.106 | (41) |
| 3.074 | (47) |
| 2.792 | (53) |
| 2.778 | (100) |
| 2.637 | (25) |
| 2.205 | (43) |
| 2.122 | (36) |
Type Occurrence of Gazeevite
Co-Type Localities:
ⓘ W slope, Har Parsa (Mt. Parsa), Hatrurim (Hatrurim Basin), Hatrurim Formation, Negev, Israel
ⓘ Jebel Harmun (Jabel Harum), Hatrurim Formation, West Bank, Palestine
ⓘ Nahal Darga, Hatrurim Formation, West Bank, Palestine
ⓘ NW slope, Shadil-Khokh volcano, Kel’ volcanic area, Greater Caucasus Mountain Range, South Ossetia
ⓘ Jebel Harmun (Jabel Harum), Hatrurim Formation, West Bank, Palestine
ⓘ Nahal Darga, Hatrurim Formation, West Bank, Palestine
ⓘ NW slope, Shadil-Khokh volcano, Kel’ volcanic area, Greater Caucasus Mountain Range, South Ossetia
Place of Conservation of Type Material:
Co-type material is deposited in the collections of the Museum of Natural History, Bernastr. 5, CH-3005 Bern, Switzerland, catalogue number NMBE 43125 (Jabel Harmun) and the Fersman Mineralogical Museum, Leninskiy pr., 18/2, 115162 Moscow, Russia, catalog
Geological Setting of Type Material:
Altered xenolith within rhyodacites; results from HT alterations of the primary clinker assemblage, in the interaction with fluids from volcanic or combustion activity
Associated Minerals at Type Locality:
Synonyms of Gazeevite
Other Information
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 Gazeevite
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Galuskin, E.V., Gfeller, F., Galuskina, I.O., Armbruster, T., Vapnik, Y., Kusz, J., Dulski, M., Gardocki, M. and Dzierz˙anowski, P. (2015) Gazeevite, IMA 2015- 037. CNMNC Newsletter No. 26, August 2015, page 946; Mineralogical Magazine, 79, 941-947.
Galuskin, E.V., Gfeller, F., Galuskina, I.O., Armbruster, T., Krzątała, A., Vapnik, Y., Kusz, J., Dulski, M., Gardocki, M., Gurbanov, A.G., Dzierżanowski, P. (2017): New minerals with a modular structure derived from hatrurite from the pyrometamorphic rocks. Part III. Gazeevite, BaCa6(SiO4)2(SO4)2O, from Israel and the Palestine Autonomy, South Levant, and from South Ossetia, Greater Caucasus. Mineralogical Magazine: 81: 499-513.
Internet Links for Gazeevite
mindat.org URL:
https://www.mindat.org/min-46709.html
Please feel free to link to this page.
Please feel free to link to this page.
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Localities for Gazeevite
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.
Israel (TL) | |
| Galuskin, E.V., Gfeller, F., Galuskina, I.O., Armbruster, T., Vapnik, Y., Kusz, J., Dulski, M., Gardocki, M. and Dzierz˙anowski, P. (2015) Gazeevite, IMA 2015- 037. CNMNC Newsletter No. 26, August 2015, page 946; Mineralogical Magazine, 79, 941-947 |
Palestine (TL) | |
| Galuskin, E.V., Gfeller, F., Galuskina, I.O., Armbruster, T., Vapnik, Y., Kusz, J., Dulski, M., Gardocki, M. and Dzierz˙anowski, P. (2015) Gazeevite, IMA 2015- 037. CNMNC Newsletter No. 26, August 2015, page 946; Mineralogical Magazine, 79, 941-947. |
| Galuskin, E.V., Gfeller, F., Galuskina, I.O., Armbruster, T., Vapnik, Y., Kusz, J., Dulski, M., Gardocki, M. and Dzierz˙anowski, P. (2015) Gazeevite, IMA 2015- 037. CNMNC Newsletter No. 26, August 2015, page 946; Mineralogical Magazine, 79, 941-947. |
South Ossetia (TL) | |
| Galuskin, E.V., Gfeller, F., Galuskina, I.O., Armbruster, T., Vapnik, Y., Kusz, J., Dulski, M., Gardocki, M. and Dzierz˙anowski, P. (2015) Gazeevite, IMA 2015- 037. CNMNC Newsletter No. 26, August 2015, page 946; Mineralogical Magazine, 79, 941-947. |
Jebel Harmun, Hatrurim Formation, West Bank, Palestine