Learning Center What is a mineral?The most common minerals on earth Information for Educators Mindat Articles The Elements The Rock H. Currier Digital Library Geologic Time

Minerals by Properties Minerals by Chemistry Advanced Locality Search Random Mineral Random Locality Search by minID Localities Near Me Search Articles Search Glossary More Search Options

The Mindat Manual Add a New Photo Rate Photos Locality Edit Report Coordinate Completion Report Add Glossary Item

Mining Companies Statistics Users Mineral Museums Clubs & Organizations Mineral Shows & Events The Mindat Directory Device Settings The Mineral Quiz

Photo Search Photo Galleries Search by Color New Photos Today New Photos Yesterday Members' Photo Galleries Past Photo of the Day Gallery Photography

Strontioborite

A valid IMA mineral species

This page is currently not sponsored. Click here to sponsor this page.

Edit Add Synonym Edit CIF structures Clear Cache

Formula:

Sr[B₈O₁₁(OH)₄]

Colour:

Colourless

Crystal System:

Monoclinic

Name:

The name reflects its composition : a strontium borate.

Type Locality:

ⓘ Chelkar salt dome, Aksai Valley, Shalkar District, Aktobe Region, Kazakhstan

Compare tunnellite, veatchite; kurgantaite, and 'balavinskite'.

Hide all sections | Show all sections

Unique IdentifiersHide

Mindat ID:

3807

Long-form identifier:

mindat:1:1:3807:8

GUID
(UUID V4):

cdcf5ebf-51e0-4846-a593-96ac066fdbc1

IMA Classification of StrontioboriteHide

IMA status:

Approved, Pending publication

Approval history:

first discredited; then (2020) re-approved

Classification of StrontioboriteHide

Strunz-mindat (2024):

6.FC.10

6 : BORATES
F : Hexaborates
C : Phyllo-hexaborates

Dana 8th ed.:

25.6.3.1

25 : ANHYDROUS BORATES CONTAINING HYDROXYL OR HALOGEN
6 : Hexaborates

Hey's CIM Ref.:

9.3.26

9 : Borates
3 : Borates of Ca and Sr

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

Pronunciation of StrontioboriteHide

Pronunciation:

Play	Recorded by	Country
	Jolyon Ralph	United Kingdom

Physical Properties of StrontioboriteHide

Transparency:

Transparent

Colour:

Colourless

Tenacity:

Very brittle

Optical Data of StrontioboriteHide

Type:

Biaxial (+/-)

RI values:

n_α = 1.470 n_β = 1.510 n_γ = 1.579

2V:

Measured: 85° , Calculated: 78°

Max Birefringence:

δ = 0.109

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

Surface Relief:

Low

Dispersion:

relatively weak

Chemistry of StrontioboriteHide

Mindat Formula:

Sr[B₈O₁₁(OH)₄]

Elements listed:

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

Crystallography of StrontioboriteHide

Crystal System:

Monoclinic

Class (H-M):

2 - Sphenoidal

Space Group:

P2₁

Setting:

P2₁

Cell Parameters:

a = 7.6192(3) Å, b = 8.1867(2) Å, c = 9.9164(3) Å
β = 108.357(4)°

Ratio:

a:b:c = 0.931 : 1 : 1.211

Unit Cell V:

587.07 Å³ (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
7.22 Å	(100)
5.409 Å	(61)
4.090 Å	(64)
3.300 Å	(48)
3.082 Å	(28)
2.926 Å	(25)
2.121 Å	(30)
2.043 Å	(37)

Type Occurrence of StrontioboriteHide

Type Locality:

ⓘ Chelkar salt dome, Aksai Valley, Shalkar District, Aktobe Region, Kazakhstan

Place of Conservation of Type Material:

collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration numbers 69851 (holotype) and ST-7069 (cotype)

Synonyms of StrontioboriteHide

IMA2020-017

Other Language Names for StrontioboriteHide

German:Strontioborit

Russian:Стронциоборит

Spanish:Strontioborita

Related Minerals - Strunz-mindat Grouping Hide

6.FC.05	Tunellite	SrB₆O₉(OH)₂ · 3H₂O	Mon. 2/m : P2₁/b
6.FC.05	Nobleite	CaB₆O₉(OH)₂ · 3H₂O	Mon. 2/m
6.FC.15	Ginorite	Ca₂B₁₄O₂₀(OH)₆ · 5H₂O	Mon. 2/m : P2₁/b
6.FC.15	Strontioginorite	CaSrB₁₄O₂₀(OH)₆ · 5H₂O	Mon. 2/m : P2₁/b
6.FC.20	Fabianite	CaB₃O₅OH	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 StrontioboriteHide

mindat.org URL:

https://www.mindat.org/min-3807.html
Please feel free to link to this page.

Search Engines:

Look for Strontioborite on Google

Look for Strontioborite images on Google

Look for Strontioborite on Bing

Look for Strontioborite images on Bing

Look for Strontioborite on DuckDuckGo

Look for Strontioborite images on DuckDuckGo

Look for Strontioborite in the Rock H. Currier Digital Library

External Links:

Look for Strontioborite on Webmineral

Look for Strontioborite on Wikipedia

Look for Strontioborite on Mineralien Atlas

Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

Mineral Dealers:

Buy from David K Joyce minerals

The Arkenstone - Fine Minerals

Blue Gems Australian & International

Fine Minerals from Weinrich Minerals, Inc.

Wilensky Exquisite Minerals

Buy rare minerals from Excalibur Minerals

Buy from McDougall Minerals

High-end worldwide specimens & outstanding customer service

References for StrontioboriteHide

Reference List:

Lobanova, V.V. (1960) A new borate-strontioborite. Doklady Akademii Nauk SSSR: l35: 173-175.

Fleischer, M. (1961) New mineral names. American Mineralogist: 46: 765-770.

Kondrat'eva, V.V. (1964) Unit cell and space group of strontioborite. Kristallografiya: 91: 916-917. (in Russian)

Fleischer, M. (1965) New mineral names. American Mineralogist: 50: 1504-1508.

Brovkin, A.A., Zayakina, N.V., Brovkina, V.S. (1975) Crystal structure of strontioborite Sr[B8O11(OH)4]. Soviet Physics - Crystallography: 20: 563-566.

Grew, Edward S., Anovitz, Lawrence M., Grew, Edward S., Anovitz, Lawrence M. - Eds. (1996) Boron - Mineralogy, Petrology and Geochemistry. Reviews in Mineralogy Vol. 33. Mineralogical Society of America

Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2020) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 56. European Journal of Mineralogy, 32 (4) 443-448 doi:10.5194/ejm-32-443-2020

(2023) Strontioborite. Handbook of Mineralogy. Mineralogical Society of America

Localities for StrontioboriteHide

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 District

Aksai Valley

ⓘ Chelkar salt dome (TL)

Handbook of Mineralogy Vol V p 6 +2 other references