Studenitsite Mineral Data

General Studenitsite Information

Chemical Formula:

NaCa2[B9O14(OH)4]•2(H2O)

Composition:

Molecular Weight = 528.49 gm

Sodium 4.35 % Na 5.86 % Na₂O

Calcium 15.17 % Ca 21.22 % CaO

Boron 18.41 % B 59.28 % B₂O₃

Hydrogen 1.53 % H 13.64 % H₂O

Oxygen 60.55 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

NaCa₂B₉O₁₄(OH)₄•2(H₂O)

Environment:

In a borate deposit.

IMA Status:

Approved IMA 1995

Locality:

In the Pobrdzhsky Potok and Peskanya deposits, 280 km south of Belgrade, near the town of Balevats on the Jbar River, western Serbia, Yugoslavia. Link to MinDat.org Location Data.

Name Origin:

For the Serbian cloister Studenitsa near the occurrence.

Name Pronunciation:

Studenitsite + Pronunciation

Synonym:

ICSD 39758

IMA1994-026

PDF 48-1897

Studenitsite Image

Images:

Studenitsite

Comments: Pale pink crystalline studenitsite micro fragment.
Location: Piskanja, Srbija, Yugoslavia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Studenitsite Crystallography

Axial Ratios:

a:b:c =0.9135:1:0.8365

Cell Dimensions:

a = 11.4994, b = 12.5878, c = 10.5297, Z = 4; beta = 99.416° V = 1,503.66 Den(Calc)= 2.33

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/c

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.04(1), 3.35(0.89), 5.41(0.66),

Forms:

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Forms: ( 0 1 1) ( 1 1 1) ( 0 1 2) ( 1 1 0) ( 1 0 0) ( 0 0 1)

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Crystal Structure:

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Yamnova N A , Egorov-Tismenko Yu K , Pushcharovskii D Yu , Malinko S V , Dorokhova G I , Crystallography Reports , 38 (1993) p.749-752, Crystal structure of a new natural Na,Ca-hydroborate NaCa2[B9O14(OH)4]*2H2O, Locality: volcanic ash deposit, near Belgrade, Yugoslavia

Physical Properties of Studenitsite

Cleavage:

None

Color:

Colorless, Light dirty yellow, Light gray.

Density:

2.29 - 2.33, Average = 2.31

Diaphaneity:

Transparent

Fracture:

Fragile - Crystals with a delicate and easily injured structure.

Habit:

Striated - Parallel lines on crystal surface or cleavage face.

Habit:

Wedge shaped - Crystals shaped like a wedge.

Hardness:

5.5-6 - Knife Blade-Orthoclase

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Studenitsite

Gladstone-Dale:

CI meas= -0.027 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.018 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2338,KPDmeas= 0.2358,KC= 0.2295
Ncalc = 1.53

Optical Data:

Biaxial (+), a=1.532, b=1.538, g=1.564, bire=0.0320, 2V(Calc)=52, 2V(Meas)=54. Dispersion medium, r > v.

Calculated Properties of Studenitsite

Electron Density:

Bulk Density (Electron Density)=2.33 gm/cc
note: Specific Gravity of Studenitsite =2.33 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_Studenitsite= 2.17 barns/electron
U=PE_Studenitsite x rElectron Density= 5.05 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Studenitsite is Not Radioactive

Studenitsite Classification

Dana Class:

26.07.08.01 (26)Hydrated Borates Containing Hydroxyl or Halogen

(26.07)Dana Type

(26.07.08)Dana Group

26.07.08.01 Studenitsite NaCa2[B9O14(OH)4]•2(H2O) P 2₁/c 2/m

Strunz Class:

06.GB.05 06 - BORATES

06.G - Heptaborates and other Megaborates

06.GB -Phyllo-nonborates, etc.

06.GB.05 Studenitsite NaCa2[B9O14(OH)4]•2(H2O) P 2₁/c 2/m

Other Studenitsite Information

References:

NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.81,p1284,1996) OPTIC PROP.(MinRec)

See Also:

Links to other databases for Studenitsite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
13 - WWW-MINCRYST

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Print or Cut-and-Paste your Studenitsite Specimen Label here :

Studenitsite

NaCa2[B9O14(OH)4]•2(H2O)
Dana No: 26.07.08.01 Strunz No: 06.GB.05
Locality:

Notes: