Studenitsite Mineral Data

Studenitsite Mineral Data +

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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.

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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Physical Properties of Studenitsite

Cleavage:

None

Color:

Colorless, Light dirty yellow, Light gray.

Density:

2.29 - 2.33, Average = 2.31

Diaphaniety:

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

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:

r_electron=2.33 gm/cc
note: r_Studenitsite=2.33 gm/cc.

Fermion Index

Fermion Index = 0.03713
Boson Index = 0.96287

Photoelectric:

PE_Studenitsite= 2.17 barns/electron
U=PE_Studenitsite x r_electron= 5.05 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Studenitsite is Not Radioactive

Studenitsite Classification

Dana Class:

26.7.8.1 (26)Hydrated Borates Containing Hydroxyl or Halogen

(26.7)Dana Type

(26.7.8)Dana Group

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

Strunz Class:

V/K.08-05 V - Nitrates, Carbonates and Borates

V/K - Layered borates with complex groups [Bx(O,OH)y]

V/K.08 - Preobrazhenskite

V/K.08-05 Studenitsite NaCa2[B9O14(OH)4]·2(H2O) P 2₁/c 2/m

V/K.08-10 Preobrazhenskite Mg3B11O15(OH)9 P bcn 2/m 2/m 2/m

V/K.08-20 Vitimite! Ca6B14O19(SO4)(OH)14·5(H2O) P 2/m, P 2, Pm, pseudo-hex Mono

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 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 - WWW-MINCRYST

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Studenitsite

NaCa2[B9O14(OH)4]·2(H2O)
Dana No: 26.7.8.1 Strunz No: V/K.08-05
Locality:

Notes: