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Jarandolite

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Big Photo

Kohnstein Quarry, Niedersachswerfen, Nordhausen, Harz Mts, Thuringia, Germany
© jo-esche 2006

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Formula:
Ca[B
 
3
O
 
4
(OH)
 
3
]
System:MonoclinicColour:colourless to white
Hardness:5½ - 6
Name:For the Jarandol basin, Serbia, in which the type locality is situated.
This page provides mineralogical data about Jarandolite.

Classification of Jarandolite

IMA status:Approved 1995
Strunz 8th edition ID:5/J.03-05
Nickel-Strunz 10th (pending) edition ID:6.CB.25

6 : BORATES
C : Triborates
B : Ino-triborates
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Type Occurrence of Jarandolite

Type Locality:Pobrdzhsky Potok & Peskanya deposits, Balevats, Jarandol Basin, Serbia
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:Fersman Museum
Geological Setting of type material:Borate deposit
Associated Minerals at type locality:
VeatchiteUlexiteStudenitsitePentahydroboriteMontmorillonite
HowliteColemanite

Physical Properties of Jarandolite

Lustre:Vitreous
Diaphaneity (Transparency):Translucent
Colour:colourless to white
Streak:white
Hardness (Mohs):5½ - 6
Tenacity:Brittle
Cleavage:Perfect
on (001)
Density (measured):2.49 g/cm3

Crystallography of Jarandolite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P21/b {P1 1 21/b} {P21/c} {P1 21/c 1} {P21/a}
Space Group Setting:P21/a
Cell Parameters:a = 8.386Å, b = 8.142Å, c = 7.249Å
β = 98.33°
Ratio:a:b:c = 1.03 : 1 : 0.89
Unit Cell Volume:V 489.7 ų
Z:4
Morphology:tabular on [001], elongated on [100], dominant faces: (001), (011), (111)
Twinning:Penetration twinning on (001)
X-Ray Powder Diffraction:
d-spacingIntensity
4.32 (55)
3.39 (100)
3.13 (50)

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°
Maximum Birefringence:δ = 0.053

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:Medium r > v
Pleochroism:Not Visible

Chemical Properties of Jarandolite

Formula:
Ca[B
 
3
O
 
4
(OH)
 
3
]
Essential elements:B, Ca, H, O
All elements listed in formula:B, Ca, H, O

Relationship of Jarandolite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
6.CB.10Colemanite
Ca[B
 
3
O
 
4
(OH)
 
3
] · H
 
2
O
6.CB.15Hydroboracite
CaMg[B
 
3
O
 
4
(OH)
 
3
]
 
2
 · 3H
 
2
O
6.CB.20Howlite
Ca
 
2
B
 
5
SiO
 
9
(OH)
 
5

Other Names for Jarandolite

Synonyms:
IMA1995-020IMA1995-020cSerbianiteSrbianite
Other Languages:
German:Jarandolith

Other Information

Fluorescence in UV light:none
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Jarandolite

Reference List:

- +
• Malinko, S.V., Aničić, S., Joksomović, D., Lisitsyn, A.E., Rudnev, V.V., Dorokhova, G.I., Yamnova, N.A., Vlasov, V.V., Ozol, A.A., Chukanov, N.V. (2004): Jarandolite Ca[B3O4(OH)3], calcium borate from Serbia: new name and new data. New Data on Minerals, 39, 26-31.

Internet Links for Jarandolite

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    • Localities for Jarandolite

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Germany
     
    • Thuringia
      • Harz Mts
        • Nordhausen
          • Niedersachswerfen
    		S. Weiß: Lapis 29(12):39 (2004)
    Serbia
     
    • Jarandol Basin
      • Balevats
    		S. V. Malinko et al.: New Data on Minerals 39:26-31 (2004)
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 19th Jun 2011 14:53:16
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