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Pentahydroborite

Pictures (4 Images total)

Pentahydroborit
Views (File:
1229107614
): 940
Pentahydroborit
Fundort: Fuka Mine, Bitchu-cho, Takahashi, Okayama Präfektur, Chugoku Region, Honshu Island, Japan; Größe: xx 2 mm
Copyright: Pavel M. Kartashov; Contribution: slugslayer
Location: Japan/Honshu/Chugoku, Region/Okayama, Präfektur/Takahashi/Bitchu (Bicchu)/Fuka Mine
Mineral: Pentahydroborite
Image: 1229107614
Rating: 6 (votes: 1)
License: Usage for Mineralienatlas project only
Pentahydroborit

Fundort: Fuka Mine, Bitchu-cho, Takahashi, Okayama Präfektur, Chugoku Region, Honshu Island, Japan; Größe: xx 2 mm
Copyright: Pavel M. Kartashov
Contribution: slugslayer 2008-12-12
Locality: Fuka Mine / Bitchu (Bicchu) / Takahashi / Okayama, Präfektur / Chugoku, Region / Honshu / Japan
Pentahydroborit
Views (File:
1266748715
): 925
Pentahydroborit
Kristallgröße: 4 mm; Fundort: Fuka Mine, Bitchu-cho, Takahashi, Präfektur Okayama, Region Chugoku, Insel Honshu, Japan
Copyright: slugslayer; Contribution: slugslayer
Collection: giantcrystal
Location: Japan/Honshu/Chugoku, Region/Okayama, Präfektur/Takahashi/Bitchu (Bicchu)/Fuka Mine
Mineral: Pentahydroborite
Image: 1266748715
License: Usage for Mineralienatlas project only
Pentahydroborit

Kristallgröße: 4 mm; Fundort: Fuka Mine, Bitchu-cho, Takahashi, Präfektur Okayama, Region Chugoku, Insel Honshu, Japan
Collection: giantcrystal
Copyright: slugslayer
Contribution: slugslayer 2010-02-21
Locality: Fuka Mine / Bitchu (Bicchu) / Takahashi / Okayama, Präfektur / Chugoku, Region / Honshu / Japan
Pentahydroborit xx
Views (File:
1412781297
): 819
Pentahydroborit xx
Shijiangshan Mine,Chifeng/Innere Mongolei,China; Bildbreite ca.3cm
Copyright: Haubi; Contribution: Haubi
Collection: Haubi
Location: China/Innere Mongolei (Neimenggu)/Ulanhad Bund (Chifeng, Präf)/Chifeng, Stadt/Hexigten-Banner (Keshiketeng)/Huanggang-Sumugou, LS-Bezirk/Huanggang/Shijiangshan Lagerstätte
Mineral: Pentahydroborite
Image: 1412781297
License: Usage for Mineralienatlas project only
Pentahydroborit xx

Shijiangshan Mine,Chifeng/Innere Mongolei,China; Bildbreite ca.3cm
Collection: Haubi
Copyright: Haubi
Contribution: Haubi 2014-10-08
Locality: Shijiangshan Lagerstätte / Huanggang / Huanggang-Sumugou, LS-Bezirk / Hexigten-Banner (Keshiketeng) / Chifeng, Stadt / Ulanhad Bund (Chifeng, Präf) / Innere Mongolei (Neimenggu) / China
Pentahydroborit
Views (File:
1559409180
): 417
Pentahydroborit
Shijiangshan Mine,Chifeng/Innere Mongolei,China - Größe: 45 x 43 x 29 mm
Copyright: Sandbild; Contribution: Sandbild
Collection: Sandbild
Location: China/Innere Mongolei (Neimenggu)/Ulanhad Bund (Chifeng, Präf)/Chifeng, Stadt/Hexigten-Banner (Keshiketeng)/Huanggang-Sumugou, LS-Bezirk/Huanggang/Shijiangshan Lagerstätte
Mineral: Pentahydroborite
Image: 1559409180
License: Usage for Mineralienatlas project only
Pentahydroborit

Shijiangshan Mine,Chifeng/Innere Mongolei,China - Größe: 45 x 43 x 29 mm
Collection: Sandbild
Copyright: Sandbild
Contribution: Sandbild 2019-06-01
Locality: Shijiangshan Lagerstätte / Huanggang / Huanggang-Sumugou, LS-Bezirk / Hexigten-Banner (Keshiketeng) / Chifeng, Stadt / Ulanhad Bund (Chifeng, Präf) / Innere Mongolei (Neimenggu) / China

Collectors Summary

Color farblos
Streak color weiß
Hardness (Mohs) 2.5
Solubility +++ Säuren
Crystal System triklin, P1

Chemism

Chemical formula

CaB2O(OH)6·2H2O

Chemical composition

Calcium, Bor, Sauerstoff, Wasserstoff

Unit weight: 215.77614 u; Number of atoms in the formula: 22

Info

Empirical formula:

CaB2O(OH)6·2H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

4.67

10

45.45

1.0079470

10.0794700
Boron

B

10.02

2

9.09

10.8117000

21.6234000
Oxygen

O

66.73

9

40.91

15.9994300

143.9948700
Calcium

Ca

18.57

1

4.55

40.0784000

40.0784000

Analysis wt%

B2O3 : 32.27, CaO : 25.99, H2O : 41.75 (Ref: berechnet)

Strunz 9th edition incl. updates

6.BB.10

6: Borate
B: Diborate
B: Insel (Neso)-Diborate mit Doppelt-Tetraedern B2(O,OH)6; 2(2T)
10:Pentahydroborit-Gruppe

Lapis Classification

V/H.04-030

V: NITRATE, CARBONATE UND BORATE
H: Gruppenborate
4: Planare Gruppen [B2O5] 4- bis [B2O7] 8-

Classification by Hölzel

6.BB.140

6: Borates
B: Diborates
B: Nesodiborates with double tetrahedra B2O(OH)6 - 2(2T)
1: Pinnoite-Group

Dana 8th edition

26.02.01.01

26: Hydrated Borates Containing Hydroxyl or Halogen
02: Hydrated Borates Containing Hydroxyl or Halogen

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos

Streak color

weiß

max. Birefringence

0.013
Birefringence chart\! Pentahydroborite title=Birefringence chart Pentahydroborite

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

1.531

RI value β

1.536

RI value γ / ε

1.544

Ri mean

1.537

2V angle

Biaxial (+) 73°

Optical Data Luminescence

Color LW-UV (365nm)

  

violett

LW-UV Intensity

schwach

Color SW-UV (254nm)

  

violett

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

triklin

Class (H-M)

1

Space Group number

1

Space Group

P1

Cell parameters a (Å)

7.875

Cell parameters b (Å)

6.534

Cell parameters c (Å)

8.104

Cell parameters a/b or c/a

1.205

Cell parameters c/b

1.240

Cell parameters α

111.53

Cell parameters β

111.33

Cell parameters γ

72.70

Z

2

Volumne (ų)

354.806

X-Ray Powder Diffraction

7.04(100),
5.86(40),
3.54(80),
2.99(90),
2.88(60),
2.49(50),
1.937(80),
1.815(60)
XRD chart Pentahydroborite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

2.5

VHN (Hardness Vickers)

53 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.00

2.02 ( ρ calc. Mineralienatlas )

Instability

+++ Säuren

(Co-)Type locality

(Co-)Type locality

Russland/Ural, Föderationskreis/Swerdlowsk, Oblast (Sverdlovskaya)/Tur'insk-Auerbakovsk Erzfeld/Krasnoturjinsk/Turya, Fluss/Turjinsk/Novofrolovskoye B-Cu-Lagerstätte

Preface

Author (Name, Year)

Malinko, 1961

References

Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 90 (1961), 673

Other languages

Spanish

Pentahidroborita

German

Pentahydroborit

English

Pentahydroborite

French

Pentahydroborite

Russian

Пентагидроборит

Japanese

五水灰硼石

Traditional Chinese

五水硼鈣石

Simplified Chinese

五水硼钙石

Alternative Name

Spanish

Pentahydroborita

Traditional Chinese

彭水硼鈣石

Simplified Chinese

彭水硼钙石

CNMNC symbol

Symbol

Phb

Locations with GPS information