Halurgite Mineral Data

Halurgite Mineral Data +

General Halurgite Information

Chemical Formula:

Mg2[B4O5(OH)4]2·(H2O)

Composition:

Molecular Weight = 449.16 gm

Magnesium 10.82 % Mg 17.95 % MgO

Boron 19.25 % B 62.00 % B₂O₃

Hydrogen 2.24 % H 20.05 % H₂O

Oxygen 67.68 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mg₂2(B₄)2(O₅)2(OH)₄·(H₂O)

IMA Status:

Approved IMA 1962

Locality:

Link to MinDat.org Location Data.

Halurgite Image

Images:

Halurgite

Comments: Nearly opaque granular halurgite.
Location: Chelkar Salt Dome, Zapadno-Kazahstan, Kazakhstan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Halurgite Crystallography

Axial Ratios:

a:b:c =1.7434:1:1.7368

Cell Dimensions:

a = 13.25, b = 7.6, c = 13.2, Z = 4; beta = 92.2° V = 1,328.26 Den(Calc)= 2.25

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2/c

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

By Intensity(I/I_o): 3.29(1), 3.87(1), 4.81(0.9),

Physical Properties of Halurgite

Color:

White.

Density:

2.19

Hardness:

2.5-3 - Finger Nail-Calcite

Streak:

white

Optical Properties of Halurgite

Gladstone-Dale:

CI meas= -0.057 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.029 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2443,KPDmeas= 0.251,KC= 0.2374

Optical Data:

Biaxial (+), a=1.532, b=1.545, g=1.572, bire=0.0400, 2V(Calc)=72, 2V(Meas)=70.

Calculated Properties of Halurgite

Electron Density:

r_electron=2.26 gm/cc
note: r_Halurgite=2.25 gm/cc.

Fermion Index

Fermion Index = 0.04946
Boson Index = 0.95054

Photoelectric:

PE_Halurgite= 0.52 barns/electron
U=PE_Halurgite x r_electron= 1.17 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Halurgite is Not Radioactive

Halurgite Classification

Dana Class:

26.4.4.1 (26)Hydrated Borates Containing Hydroxyl or Halogen

(26.4)Dana Type

(26.4.4)Dana Group

26.4.4.1 Halurgite Mg2[B4O5(OH)4]2·(H2O) P 2/c 2/m

Strunz Class:

V/H.12-10 V - Nitrates, Carbonates and Borates

V/H - Group borates. Planary and tetrahedral groups [B3O5]1- to [B6O10]2-

V/H.12 - Halurgite - Eketerinite series

V/H.12-10 Halurgite Mg2[B4O5(OH)4]2·(H2O) P 2/c 2/m

V/H.12-20 Hungchaoite MgB4O5(OH)4·7(H2O) P1 1

V/H.12-30 Wardsmithite Ca5MgB24O42·30(H2O) Unk Hex

V/H.12-40 Ekaterinite Ca2B4O7(Cl,OH)2·2(H2O) C6 6

Other Halurgite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Halurgite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Halurgite

Mg2[B4O5(OH)4]2·(H2O)
Dana No: 26.4.4.1 Strunz No: V/H.12-10
Locality:

Notes: