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 % B₂O₃

Hydrogen 4.08 % H 36.44 % H₂O

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

Comments: Clear to white crystalline frolovite in rock.
Location: Solongo, Republic of Buryatia, Siberia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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

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

By Intensity(I/I_o): 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:

PE_Frolovite= 2.65 barns/electron
U=PE_Frolovite x rElectron 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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