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Hydroxylborite (Hydroxylborit)

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Hydroxylborit
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Hydroxylborit
radialstrahliges Aggregat von Hydroxylborit, Titovskoe Bor-Lagerstätte, Tas-Khayakhtakh-Gebirge, Sacha, Russland; BB ~ 1 cm, analysiert
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Russland/Ferner Osten, Föderationskreis/Sacha (Sakha, Jakutien, Якутия), Republik/Tas-Khayakhtakh-Gebirge/Titovskoe (Titovskoye) Bor-Lagerstätte
Mineral: Hydroxylborite
Image: 1648887430
License: Usage for Mineralienatlas project only
Hydroxylborit

radialstrahliges Aggregat von Hydroxylborit, Titovskoe Bor-Lagerstätte, Tas-Khayakhtakh-Gebirge, Sacha, Russland; BB 1 cm, analysiert
Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2022-04-02
Locality: Titovskoe (Titovskoye) Bor-Lagerstätte / Tas-Khayakhtakh-Gebirge / Sacha (Sakha, Jakutien, Якутия), Republik / Ferner Osten, Föderationskreis / Russland

Collectors Summary

Color farblos
Streak color weiß
Lustre Glasglanz
Hardness (Mohs) 3.5
Cleavages unvollkommen (0001)
Fracture muschelig
Crystal System hexagonal, P63/m
Morphology Das Mineral bildet in der Typlokalität prismatische, 1,5 x 0,2 mm große Kristalle, ohne deutliche Endflächen.

Chemism

Chemical formula

Mg3(BO3)(OH)3

Additional chem. information

OH-dominiertes Analog von Fluoborit

Chemical composition

Magnesium, Bor, Sauerstoff, Wasserstoff

Unit weight: 182.747301 u; Number of atoms in the formula: 13

Info

Empirical formula:

Mg3(BO3)(OH)3

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

1.65

3

23.08

1.0079470

3.0238410
Boron

B

5.92

1

7.69

10.8117000

10.8117000
Oxygen

O

52.53

6

46.15

15.9994300

95.9965800
Magnesium

Mg

39.90

3

23.08

24.3050600

72.9151800

Analysis wt%

B2O3 : 18.43, MgO : 65.71, F : 10.23, H2O : 9.73 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 2007)

Strunz 9th edition incl. updates

6.AB.50

6: Borate
A: Monoborate
B: BO3 mit zusätzlichen Anionen; 1(Δ) + OH, etc.
50:Fluoborit-Gruppe

Lapis Classification

V/G.05-015

V: NITRATE, CARBONATE UND BORATE
G: Inselborate
5: [BO3] 3--Inseln

Classification by Hölzel

6.AB.610

6: Borates
A: Monoborates
B: BO3, with additional anions - 1(P)+OH, etc.
6: Fluoborite-Group (structurally closely related)

IMA status

anerkannt 2005

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos

Streak color

weiß

Diaphaneity (Transparency)

transparent

Lustre

Glasglanz

max. Birefringence

0.035
Birefringence chart\! Hydroxylborite title=Birefringence chart Hydroxylborite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.566

RI value γ / ε

1.531

Ri mean

1.554

2V angle

Uniaxial (-)

Optical Data Luminescence

Luminescence

bläuliche Fluoreszenz im UV-Licht

Color SW-UV (254nm)

  

blau

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

hexagonal

Class (H-M)

6/m

Space Group number

176

Space Group

P63/m

Cell parameters a (Å)

8.912

Cell parameters b (Å)

-

Cell parameters c (Å)

3.112

Cell parameters a/b or c/a

0.349

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

2

Volume (ų)

214.053

X-Ray Powder Diffraction

7.69(52), 4.45(82), 2.916(42), 2.573(65), 2.551(49), 2.422(100), 2.141(44), 2.128(60)
XRD chart Hydroxylborite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Morphology

Das Mineral bildet in der Typlokalität prismatische, 1,5 x 0,2 mm große Kristalle, ohne deutliche Endflächen.

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

3.5

VHN (Hardness Vickers)

130 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.89 gemessen

2.835 ( ρ calc. Mineralienatlas )

Cleavages

unvollkommen (0001)

Fracture

muschelig

Tenacity

spröde

Chemical Properties and Tests

löslich in konz. Schwefelsäure, unlöslich in verd. Salzsäure und Wasser

(Co-)Type locality

(Co-)Type locality

Russland/Ferner Osten, Föderationskreis/Sacha (Sakha, Jakutien, Якутия), Republik/Tas-Khayakhtakh-Gebirge/Titovskoe (Titovskoye) Bor-Lagerstätte

Preface

Associations

Calcit, Dolomit, Mg-reicher Ludwigit, Kotoit, Szaibelyit, Klinohumit, Magnetit, Serpentin, Chlorit

Name from

chemischer Zusammensetzung und kristallchemischer Verwandschaft mit Fluoborit

References

Mineralien Welt 05/08, Steffen Jahn, Die neuen Mineralien 2007 - 2008

Other languages

German

Hydroxylborit

English

Hydroxylborite

Russian

Гидроксилборит

CNMNC (IMA)-Number

IMA 2005-054

CNMNC symbol

Symbol

Hyb

IDs

GUSID (Global unique identifier short form) QjustT2X30OdRBzH8VDs2Q
GUID (Global unique identifier) B5AC3B42-973D-43DF-9D44-1CC7F150ECD9
Database ID 4439