Jarandolite
A valid IMA mineral species
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About Jarandolite
Formula:
Ca[B3O4(OH)3]
Colour:
Colourless to white
Lustre:
Vitreous
Hardness:
5½ - 6
Specific Gravity:
2.49
Crystal System:
Monoclinic
Name:
For the Jarandol basin, Serbia, in which the type locality is situated.
This page provides mineralogical data about Jarandolite.
Unique Identifiers
Mindat ID:
27105
Long-form identifier:
mindat:1:1:27105:7
GUID
(UUID V4):
(UUID V4):
53902162-1f19-4b38-9c9e-d66605256bf2
IMA Classification of Jarandolite
Classification of Jarandolite
6.CB.25
6 : BORATES
C : Triborates
B : Ino-triborates
6 : BORATES
C : Triborates
B : Ino-triborates
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 |
---|---|---|
Jdo | 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 Jarandolite
Vitreous
Transparency:
Translucent
Colour:
Colourless to white
Streak:
White
Hardness:
5½ - 6 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
on (001)
on (001)
Density:
2.49 g/cm3 (Measured) 2.57 g/cm3 (Calculated)
Optical Data of Jarandolite
Type:
Biaxial (+)
RI values:
nα = 1.573(2) nβ = 1.586(2) nγ = 1.626(2)
2V:
Measured: 60° (2), Calculated: 59.23°
Max Birefringence:
δ = 0.053
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
Dispersion:
Medium r > v
Pleochroism:
Not Visible
Chemistry of Jarandolite
Mindat Formula:
Ca[B3O4(OH)3]
Elements listed:
Crystallography of Jarandolite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/a
Cell Parameters:
a = 8.386 Å, b = 8.142 Å, c = 7.249 Å
β = 98.33°
β = 98.33°
Ratio:
a:b:c = 1.03 : 1 : 0.89
Unit Cell V:
489.7 ų
Z:
4
Morphology:
Tabular on [001], elongated on [100], dominant faces: (001), (011), (111)
Twinning:
Penetration twinning on (001)
Crystal Structure
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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) |
---|---|---|---|---|---|---|---|
0012346 | Jarandolite | Yamnova N A, Egorov-Tismenko Y K, Malinko S V, Pushcharovskii D Y, Dorokhova G I (1994) Crystal structure of a new natural calcium hydroborate Ca[B3O4(OH)3] Crystallography Reports 39 991-993 | 1994 | Belgrade, Serbia, Yugoslavia | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
4.32 Å | (55) |
3.39 Å | (100) |
3.13 Å | (50) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Near-surface Processes | |
25 : Evaporites (prebiotic) |
Type Occurrence of Jarandolite
General Appearance of Type Material:
Radiating aggregates to 3.5 x 2 cm, consisting of elongated tabular crystals to 1.5 cm.
Place of Conservation of Type Material:
A.E. Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia (# 1538/1).
Geological Setting of Type Material:
In a mixed volcanic-sedimentary deposit and in a Miocene lacustrine basin. Magnesite alternates with tuffaceous rocks, clays, and marls. The magnesite contains both borate and coal layers. The borates occur mostly in the tuffaceous deposits.
Associated Minerals at Type Locality:
Synonyms of Jarandolite
Other Language Names for Jarandolite
Related Minerals - Strunz-mindat Grouping
6.CB.10 | Colemanite | Ca[B3O4(OH)3] · H2O |
6.CB.15 | Hydroboracite | CaMg[B3O4(OH)3]2 · 3H2O |
6.CB.20 | Howlite | Ca2B5SiO9(OH)5 |
Fluorescence of Jarandolite
none
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.
Internet Links for Jarandolite
mindat.org URL:
https://www.mindat.org/min-27105.html
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References for Jarandolite
Localities for Jarandolite
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).
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.
All localities listed without proper references should be considered as questionable.
Germany | |
| S. Weiß: Lapis 29 (12) |
Serbia (TL) | |
| Malinko et al. (2004) |
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Kohnstein Quarry, Niedersachswerfen, Harztor, Nordhausen District, Thuringia, Germany