Frolovite Mineral Data
General Frolovite Information
Chemical Formula:
CaB2(OH)8
Composition:
Molecular Weight = 197.76 gm
Calcium 20.27 % Ca 28.36 % CaO
Boron 10.93 % B 35.20 % B2 O3
Hydrogen 4.08 % H 36.44 % H2 O
Oxygen 64.72 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
CaB2 (OH)8
Environment:
In a skarn deposit replacing calciborite.
IMA Status:
Valid Species (Pre-IMA) 1957
Locality:
Novo-Frolvsk, Turinsk region, Ural Mountains, Russia. Link to MinDat.org Location Data.
Name Origin:
Named for the locality.
Name Pronunciation:
Frolovite + Pronunciation
Synonym:
ICSD 20060
PDF 45-7
Frolovite Image
Images:
Frolovite Crystallography
Axial Ratios:
a:b:c =1.3686:1:1.4323
Cell Dimensions:
a = 7.774, b = 5.68, c = 8.136, Z = 2; alpha = 113.15°, beta = 101.67°, gamma = 107.87° V = 307.89 Den(Calc)= 2.13
Crystal System:
Triclinic - Pinacoidal H-M Symbol ( 1 ) Space Group: P1
X Ray Diffraction:
By Intensity(I/Io ): 6.084(1), 3.858(0.9), 3.471(0.8),
Physical Properties of Frolovite
Color:
Gray white, White.
Density:
2.14
Diaphaneity:
Translucent
Habit:
Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.
Hardness:
3.5 - Copper Penny
Luster:
Earthy (Dull)
Streak:
white
Optical Properties of Frolovite
Gladstone-Dale:
CI meas = -0.034 (Excellent) - where the CI = (1-KPDmeas /KC ) CI calc = 0.016 (Superior) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.255,KPDmeas = 0.2681,KC = 0.2591 Ncalc = 1.55 - 1.58
Optical Data:
Biaxial (?), a=1.563, b=1.572, g=1.586, bire=0.0230, 2V(Calc)=80, 2V(Meas)=70.
Calculated Properties of Frolovite
Electron Density:
Bulk Density (Electron Density)=2.32 gm/cc note: Specific Gravity of Frolovite =2.25 gm/cc.
Fermion Index:
Fermion Index = 0.02 Boson Index = 0.98
Photoelectric:
PEFrolovite = 2.65 barns/electronU=PEFrolovite x r Electron Density= 6.16 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Frolovite is Not Radioactive
Frolovite Classification
Dana Class:
25.01.03.01 (25) Anhydrous Borates Containing Hydroxyl or Halogen
(25.01) Dana Type
(25.01.03) Dana Group
25.01.03.01 Frolovite CaB2(OH)8 P1 1
Strunz Class:
06.AC.20 06 - BORATES
06.A - Monoborates
06.AC -B(O,OH)4, without and with additional anions; 1(T), 1(T)+OH, etc.
06.AC.20 Frolovite CaB2(OH)8 P1 1
Other Frolovite Information
References:
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
See Also:
Links to other databases for Frolovite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST
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Print or Cut-and-Paste your Frolovite Specimen Label here :
Frolovite
CaB2(OH)8
Dana No: 25.01.03.01 Strunz No: 06.AC.20
Locality:
Notes:
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