Szaibelyite Mineral Data

Szaibelyite Mineral Data +

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General Szaibelyite Information

Chemical Formula:

MgBO2(OH)

Composition:

Molecular Weight = 84.12 gm

Magnesium 28.89 % Mg 47.91 % MgO

Boron 12.85 % B 41.38 % B₂O₃

Hydrogen 1.20 % H 10.71 % H₂O

Oxygen 57.06 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

MgBO₂(OH)

IMA Status:

Valid Species (Pre-IMA) 1861

Locality:

Link to MinDat.org Location Data.

Synonym:

Ascharite

Camsellite

Szaibelyite Image

Images:

Szaibelyite Borcarite

Comments: Pale aqua granular borcarite with white fibrous to granular szaibelyite.
Location: Nalednoya, Republic of Sakha, Siberia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Szaibelyite Kainite

Comments: pale violet granular kainite intermixed with white ascharite (szaibelyite).
Location: Havesa, Empelde, Hannover, Niedersachsen, Germany. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Szaibelyite

Comments: Bright white fibrous szaibelyite coating on serpentinite rock.
Location: Stinson Beach, Marin County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Szaibelyite Crystallography

Axial Ratios:

a:b:c =1.2101:1:0.302

Cell Dimensions:

a = 12.577, b = 10.393, c = 3.139, Z = 8; beta = 95.88° V = 408.15 Den(Calc)= 2.74

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/a

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

By Intensity(I/I_o): 6.2(1), 2.202(0.8), 2.657(0.75),

Crystal Structure:

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Takeuchi Y , Kudoh Y , American Mineralogist , 60 (1975) p.273-279, Szaibelyite, Mq2(OH)[B2O4(OH)]: Crystal structure, pseudosymmetry, and, polymorphism

Physical Properties of Szaibelyite

Cleavage:

None

Color:

White, Yellow.

Density:

2.65 - 2.7, Average = 2.67

Diaphaniety:

Transparent to Translucent

Fracture:

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

Habit:

Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).

Habit:

Fibrous - Crystals made up of fibers.

Habit:

Nodular - Tuberose forms having irregular protuberances over the surface.

Hardness:

3-3.5 - Calcite-Copper Penny

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Dull

Magnetism:

Nonmagnetic

Streak:

white

Optical Properties of Szaibelyite

Gladstone-Dale:

CI meas= -0.056 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.031 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2281,KPDmeas= 0.2336,KC= 0.2212

Optical Data:

Biaxial (-), a=1.53-1.67, b=1.53-1.73, g=1.55-1.74, bire=0.0200-0.0700, 2V(Calc)=0-42, 2V(Meas)=0-10. Dispersion none.

Pleochroism (x):

none.

Pleochroism (y):

none.

Pleochroism (z):

none.

Calculated Properties of Szaibelyite

Electron Density:

r_electron=2.74 gm/cc
note: r_Szaibelyite=2.74 gm/cc.

Fermion Index

Fermion Index = 0.05474
Boson Index = 0.94526

Photoelectric:

PE_Szaibelyite= 0.81 barns/electron
U=PE_Szaibelyite x r_electron= 2.22 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Szaibelyite is Not Radioactive

Szaibelyite Classification

Dana Class:

25.2.1.2 (25)Anhydrous Borates Containing Hydroxyl or Halogen

(25.2)Dana Type

(25.2.1)Dana Group

25.2.1.1 Sussexite MnBO2(OH) P 2₁/c 2/m

25.2.1.2 Szaibelyite MgBO2(OH) P 2₁/a 2/m

Strunz Class:

V/H.02-10 V - Nitrates, Carbonates and Borates

V/H - Group borates. Planary groups [B2O5]4- to [B2O7]2-

V/H.02 - Szaibelyite - Sibirskite series

V/H.02-10 Szaibelyite MgBO2(OH) P 2₁/a 2/m

V/H.02-20 Sussexite MnBO2(OH) P 2₁/c 2/m

V/H.02-30 Sibirskite CaHBO3 P 2/m 2/m

V/H.02-35 Parasibirskite! Ca2B2O5·(H2O) P 2₁/m 2/m

Other Szaibelyite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)

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Translate Szaibelyite Mineral Data :

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

Szaibelyite

MgBO2(OH)
Dana No: 25.2.1.2 Strunz No: V/H.02-10
Locality:

Notes: