Jeremejevite Mineral Data

Jeremejevite Mineral Data +

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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).

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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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

Diaphaniety:

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

Optical Data:

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

Calculated Properties of Jeremejevite

Electron Density:

r_electron=3.20 gm/cc
note: r_Jeremejevite=3.28 gm/cc.

Fermion Index

Fermion Index = 0.02124
Boson Index = 0.97876

Photoelectric:

PE_Jeremejevite= 1.09 barns/electron
U=PE_Jeremejevite x r_electron= 3.49 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Jeremejevite is Not Radioactive

Jeremejevite Classification

Dana Class:

25.8.1.1 (25)Anhydrous Borates Containing Hydroxyl or Halogen

(25.8)Dana Type

(25.8.1)Dana Group

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

Strunz Class:

V/G.05-30 V - Nitrates, Carbonates and Borates

V/G - "Insel" borates [BO3]3- "inseln"

V/G.05 - Fluoborite - Painite series

V/G.05-10 Fluoborite Mg3(BO3)(F,OH)3 P 6₃/m 6/m

V/G.05-20 Karlite! (Mg,Al)6(BO3)3(OH,Cl)4 P 2₁2₁2₁ 2 2 2

V/G.05-30 Jeremejevite Al6B5O15(F,OH)3 P 6₃/m 6/m

V/G.05-40 Painite CaZrB[Al9O18] 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 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - MinMax(Deutsch)
12 - MinMax(English)
13 - Mineralienatlas (Deutsch)
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - Tradeshop.com - The Rainbow of Gems
17 - WWW-MINCRYST

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

Jeremejevite

Al6B5O15(F,OH)3
Dana No: 25.8.1.1 Strunz No: V/G.05-30
Locality:

Notes: