The mineral is named in honour of the Russian geologist, petrologist and mineralogist Yakov Yakovlevich Yarzhemskii (1901–?), a specialist in petrology of evaporite rocks and mineralogy and genesis of boron deposits related to evaporites.

Type Locality:

ⓘ Borehole no. 800, Chelkar salt dome, Aksai Valley, Shalkar, Aktobe Region, Kazakhstan

This page provides mineralogical data about Yarzhemskiite.

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Unique IdentifiersHide

Mindat ID:

53024

Long-form identifier:

mindat:1:1:53024:2

GUID
(UUID V4):

46ec495c-7c89-433f-ada3-fb8c69c88050

Classification of YarzhemskiiteHide

IMA status:

Approved

First published:

2020

Type description reference:

Pekov, I.V., Zubkova, N.V., Korotchenkova, O.V., Chaikovskiy, I.I., Yapaskurt, V.O., Chukanov, N.V., Belakovskiy, D.I., Lykova, I.S., Britvin, S.N., Pushcharovsky, D.Y. (2020) Yarzhemskiite, K[B5O7(OH)2]⋅H2O, a new mineral from the Chelkar salt dome, Western Kazakhstan. Mineralogical Magazine: 84(2): 335-342.

Strunz-mindat (2023):

6.EB.05

6 : BORATES
E : Pentaborates
B : Ino-pentaborates

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Symbol	Source	Reference
Yzm	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of YarzhemskiiteHide

Lustre:

Vitreous

Transparency:

Transparent

Colour:

Colorless

Streak:

White

Hardness:

2½ on Mohs scale

Tenacity:

Brittle

Cleavage:

Perfect
{100}

Density:

2.13(1) g/cm³ (Measured) 2.112 g/cm³ (Calculated)

Optical Data of YarzhemskiiteHide

Type:

Biaxial (+)

RI values:

n_α = 1.484(2) n_β = 1.508(2) n_γ = 1.546(2)

2V:

Measured: 75° (10), Calculated: 80°

Max Birefringence:

δ = 0.062

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Surface Relief:

Low

Chemical Properties of YarzhemskiiteHide

Formula:

K[B₅O₇(OH)₂] · H₂O

Elements listed:

B, H, K, O - search for minerals with similar chemistry

Crystallography of YarzhemskiiteHide

Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Space Group:

P2₁/b

Setting:

P2₁/c

Cell Parameters:

a = 9.4734(2) Å, b = 7.5203(2) Å, c = 11.4205(2) Å
β = 97.300(3)°

Ratio:

a:b:c = 1.26 : 1 : 1.519

Unit Cell V:

807.03 Å³

Morphology:

Thick tabular, short prismatic or equant crystals

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
9.39 Å	(86)
4.696 Å	(41)
3.296 Å	(18)
3.130 Å	(19)
2.935 Å	(42)
2.898 Å	(100)
2.832 Å	(56)
1.867 Å	(18)

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Near-surface Processes
25 : Evaporites (prebiotic)

Type Occurrence of YarzhemskiiteHide

Type Locality:

ⓘ Borehole no. 800, Chelkar salt dome, Aksai Valley, Shalkar, Aktobe Region, Kazakhstan

General Appearance of Type Material:

separate thick tabular, short prismatic or equant crystals up to 0.5 mm × 0.7 mm × 1 mm and grains having irregular outlines up to 1 mm × 1.5 mm × 2 mm

Place of Conservation of Type Material:

Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia, registration number 5154/1

Geological Setting of Type Material:

Salt beds

Associated Minerals at Type Locality:

Strontioginorite	Satimolite	Quartz	Polyhalite	Gypsum
Carnallite

Reference:

Synonyms of YarzhemskiiteHide

IMA2018-019

Related Minerals - Strunz-mindat Grouping Hide

6.EB.05	Larderellite	(NH₄)B₅O₇(OH)₂ · H₂O	Mon. 2/m : P2₁/b
6.EB.10	Ezcurrite	Na₄B₁₀O₁₇ · 7H₂O	Tric. 1 : P1
6.EB.15	Probertite	NaCa[B₅O₇(OH)₄] · 3H₂O	Mon. 2/m : P2₁/b
6.EB.20	Tertschite	Ca₄B₁₀O₁₉ · 20H₂O	Mon.
6.EB.25	Priceite	Ca₂B₅O₇(OH)₅ · H₂O	Mon. 2/m : P2₁/b

Other InformationHide

Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for YarzhemskiiteHide

mindat.org URL:

https://www.mindat.org/min-53024.html
Please feel free to link to this page.

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External Links:

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Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

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References for YarzhemskiiteHide

Reference List:

Pekov, I.V., Zubkova, N.V., Korotchenkova, O.V., Chaikovskiy, I.I., Yapaskurt, V.O., Chukanov, N.V., Belakovskiy, D.I., Lykova, I.S., Britvin, S.N. and Pushcharovsky, D.Y. (2018) Yarzhemskiite, IMA 2018-019. CNMNC Newsletter No. 44, August 2018, page 1016. Mineralogical Magazine: 82(4): 1015–1021.

Localities for YarzhemskiiteHide

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 references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.

Kazakhstan (TL)

Aktobe Region

Shalkar

Aksai Valley

Chelkar salt dome

ⓘ Borehole no. 800 (TL)

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Yarzhemskiite