Studenitsite
A valid IMA mineral species
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About Studenitsite
Studenica Monastery, Serbia
Formula:
NaCa2[B9O14(OH)4] · 2H2O
Colour:
Colourless to light dirty-yellow and light grey
Lustre:
Vitreous
Hardness:
5½ - 6
Specific Gravity:
2.29
Crystal System:
Monoclinic
Name:
Named after Studenica, a cloister near the discovery locality.
This page provides mineralogical data about Studenitsite.
Unique Identifiers
Mindat ID:
3814
Long-form identifier:
mindat:1:1:3814:6
IMA Classification of Studenitsite
Approved
IMA Formula:
NaCa2B9O14(OH)4 · 2H2O
Approval year:
1994
Classification of Studenitsite
6.GB.05
6 : BORATES
G : Heptaborates and other megaborates
B : Phyllo-nonborates, etc.
6 : BORATES
G : Heptaborates and other megaborates
B : Phyllo-nonborates, etc.
26.7.8.1
26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
7 : Miscellaneous
26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
7 : Miscellaneous
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Sdn | 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 Studenitsite
Vitreous
Transparency:
Transparent, Translucent
Colour:
Colourless to light dirty-yellow and light grey
Streak:
White
Hardness:
5½ - 6 on Mohs scale
Hardness:
VHN100=527 - 550 - Vickers
Tenacity:
Fragile
Cleavage:
None Observed
Density:
2.29 g/cm3 (Measured) 2.34 g/cm3 (Calculated)
Optical Data of Studenitsite
Type:
Biaxial (+)
RI values:
nα = 1.532(2) nβ = 1.538(2) nγ = 1.564(2)
2V:
Measured: 54° (2), Calculated: 52°
Max. Birefringence:
δ = 0.032
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
Surface Relief:
Moderate
Dispersion:
medium
Chemistry of Studenitsite
Mindat Formula:
NaCa2[B9O14(OH)4] · 2H2O
Element Weights:
Crystallography of Studenitsite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 11.4994(8) Å, b = 12.5878(9) Å, c = 10.5297(7) Å
β = 99.423(6)°
β = 99.423(6)°
Ratio:
a:b:c = 0.914 : 1 : 0.837
Unit Cell V:
1,503.63 ų (Calculated from Unit Cell)
Z:
4
Morphology:
{001}, {011}, and {111}, plus poorly developed {100}, {110}, and {012}.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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Big Balls | Small Balls | Just Balls | Spacefill
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0012343 | Studenitsite | Yamnova N A, Egorov-Tismenko Y K, Pushcharovskii D Y, Malinko S V, Dorokhova G I (1993) Crystal structure of a new natural Na,Ca-hydroborate NaCa2[B9O14(OH)4]*2H2O Crystallography Reports 38 749-752 | 1993 | volcanic ash deposit, near Belgrade, Yugoslavia | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.04 Å | (100) |
| 3.35 Å | (89) |
| 5.41 Å | (66) |
| 3.27 Å | (59) |
| 2.210 Å | (59) |
| 5.20 Å | (57) |
| 4.20 Å | (56) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47c : [Carbonates, phosphates, borates, nitrates] |
Type Occurrence of Studenitsite
General Appearance of Type Material:
Aggregates of closely intergrown, striated crystals to 5 mm long.
Place of Conservation of Type Material:
Fersman Mineralogical Museum, Moscow, Russia.
Associated Minerals at Type Locality:
Synonyms of Studenitsite
Other Language Names for Studenitsite
Dutch:Studenitsiet
German:Studenitsit
Russian:Студеницит
Simplified Chinese:水硼钠钙石
Spanish:Studenitsita
Traditional Chinese:水硼鈉鈣石
Related Minerals - Strunz-mindat Grouping
| 6.GB.10 | Penobsquisite | Ca2Fe2+[B9O13(OH)6]Cl · 4H2O |
| 6.GB.15 | Preobrazhenskite | Mg3B11O15(OH)9 |
| 6.GB.20 | Walkerite | Ca16(Mg,Li,◻)2[B13O17(OH)12]4Cl6 · 28H2O |
Other Information
Thermal Behaviour:
Endotherms at 435 and 470°C (15% weight loss, corresponding to vaporization of H2O and OH), 605°C (changes in structure), 780°C (melting), and an exotherm at 710°C (structural change).
Notes:
No reaction with water, slowly dissolves in dilute HCl and H2SO4.
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 Studenitsite
mindat.org URL:
https://www.mindat.org/min-3814.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Studenitsite
Reference List:
Localities for Studenitsite
Showing 1 localities.
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Serbia (TL) | |
| Malinko et al. (1995) +2 other references |
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Pobrdzhsky Potok & Peskanya deposits, Baljevac na Ibru, Jarandol Basin, Raška, Raška District, Central Serbia, Serbia