Jeremejevite Mineral Data

General Jeremejevite Information

Chemical Formula:

Al6B5O15(F,OH)3

Composition:

Molecular Weight = 511.93 gm

Aluminum 31.62 % Al 59.75 % Al₂O₃

Boron 10.56 % B 34.00 % B₂O₃

Hydrogen 0.10 % H 0.88 % H₂O

Oxygen 48.44 % O

Fluorine 9.28 % F 9.28 % F

- % F -3.91 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Al₆B₅O₁₅F_2.5(OH)_0.5

Environment:

Granitic pegmatites.

IMA Status:

Valid Species (Pre-IMA) 1883

Locality:

Soktujberg, Adun-Tchilon and Baikal, Russia. Link to MinDat.org Location Data.

Name Origin:

Named after the Russian mineralogist, P. V. Jeremejev (1820-1899).

Name Pronunciation:

Jeremejevite + Pronunciation

Synonym:

Eichwaldite

Eremeyevite

Eremyeevite

Jeremejevite Image

Images:

Jeremejevite

Comments: Partial crystal fragment of jeremejevite.
Location: Mile 72, Swakopmund, Namibia. Scale: Crystal size 0.5 cm.
© John Veevaert

Images:

Jeremejevite

Comments: Two-toned hexagonal crystal of jeremejevite with blue bases and white terminations.
Location: Erongo Mountains, Namibia. Scale: Crystal size 2 cm.
© John Veevaert

Jeremejevite Crystallography

Axial Ratios:

a:c = 1:0.95587

Cell Dimensions:

a = 8.5591, c = 8.1814, Z = 2; V = 519.06 Den(Calc)= 3.28

Crystal System:

Hexagonal - DipyramidalH-M Symbol (6/m) Space Group: P 6₃/m

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

By Intensity(I/I_o): 1.388(1), 4.27(1), 2.19(0.9),

Forms:

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

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Crystal Structure:

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Rodellas C , Garcia-Blanco S , Vegas A , Zeitschrift fur Kristallographie , 165 (1983) p.255-260, Crystal structure refinement of jeremejevite (Al6B5F3O15), Locality: Cape Cross, Namibia

Physical Properties of Jeremejevite

Cleavage:

None

Color:

Colorless, White, Yellowish white, Bluish white.

Density:

3.28 - 3.31, Average = 3.29

Diaphaneity:

Transparent

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Habit:

Crystalline - Fine - Occurs as well-formed fine sized crystals.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

7 - Quartz

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Jeremejevite

Gladstone-Dale:

CI meas= 0.039 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.034 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1971,KPDmeas= 0.1962,KC= 0.2041
Ncalc = 1.67 - 1.68

Optical Data:

Uniaxial (-), e=1.64, w=1.653, bire=0.0130.

Calculated Properties of Jeremejevite

Electron Density:

Bulk Density (Electron Density)=3.20 gm/cc
note: Specific Gravity of Jeremejevite =3.28 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Jeremejevite= 1.09 barns/electron
U=PE_Jeremejevite x rElectron Density= 3.49 barns/cc.

Radioactivity:

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

Jeremejevite Classification

Dana Class:

25.08.01.01 (25)Anhydrous Borates Containing Hydroxyl or Halogen

(25.08)Dana Type

(25.08.01)Dana Group

25.08.01.01 Jeremejevite Al6B5O15(F,OH)3 P 6₃/m 6/m

Strunz Class:

06.AB.15 06 - BORATES

06.A - Monoborates

06.AB -BO3, with additional anions; 1(D) + OH, etc.

06.AB.15 Jeremejevite Al6B5O15(F,OH)3 P 6₃/m 6/m

Other Jeremejevite Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Jeremejevite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - CalTech Mineral Spectroscopy
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - Tradeshop.com - The Rainbow of Gems
17 - WWW-MINCRYST

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Ask about Jeremejevite here :
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Print or Cut-and-Paste your Jeremejevite Specimen Label here :

Jeremejevite

Al6B5O15(F,OH)3
Dana No: 25.08.01.01 Strunz No: 06.AB.15
Locality:

Notes: