https://www.mineralbox.biz
https://www.edelsteine-neuburg.de
https://www.mineral-bosse.de
https://www.mineraliengrosshandel.com
'._('einklappen').'
 

Sphaerobertrandite

Pictures (1 Images total)

Sphaerobertrandit
Views (File:
1568451825
): 357
Sphaerobertrandit
Radial angeordnete, blättrige und cremeweiß gefärbte Kristalle von Sphaerobertrandit. Fundort: Berg Sengischorr, Lovozersky Distr., Murmansk Oblast, Russland. Bildbreite ~4mm.
Copyright: Yi Sun; Contribution: sun-mineral
Collection: Yi Sun
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Lovozero/Sengischorr
Mineral: Sphaerobertrandite
Image: 1568451825
License: Usage for Mineralienatlas project only
Sphaerobertrandit

Radial angeordnete, blättrige und cremeweiß gefärbte Kristalle von Sphaerobertrandit. Fundort: Berg Sengischorr, Lovozersky Distr., Murmansk Oblast, Russland. Bildbreite 4mm.
Collection: Yi Sun
Copyright: Yi Sun
Contribution: sun-mineral 2019-09-14
Locality: Sengischorr / Lovozero / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland

Collectors Summary

Color farblos, beigeweiß, blassgelb, blassbraun
Streak color weiß
Hardness (Mohs) 5
Cleavages vollkommen {001}
Fracture uneben
Crystal System monoklin, P21/c

Chemism

Chemical formula

Be3[(OH)2|SiO4]

Chemical composition

Beryllium, Silicium, Sauerstoff, Wasserstoff

Unit weight: 153.1345509 u; Number of atoms in the formula: 12

Info

Empirical formula:

Be3[(OH)2SiO4]

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

1.32

2

16.67

1.0079470

2.0158940
Beryllium

Be

17.66

3

25.00

9.0121823

27.0365469
Oxygen

O

62.69

6

50.00

15.9994300

95.9965800
Silicon

Si

18.34

1

8.33

28.0855300

28.0855300

Analysis wt%

SiO2 : 41.03, Al2O3 : 1.40, BeO : 45.20, H2O : 12.00 (Ref: TrudyIMGRE,1957)

Strunz 9th edition incl. updates

9.AE.50

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
E: Insel(Neso)silikate mit zusätzlichem (O,OH,F,H2O); Kationen in tetrahedralrt [4] und meist größerer Koordination
50:Sphaerobertrandit-Gruppe

Lapis Classification

VIII/B.01-025

VIII: SILIKATE
B: Inselsilikate mit tetraederfremden Anionen
1: Kationen in tetraedrischer oder oktaedrischer Koordination [4/6]

Classification by Hölzel

9.AI.110

9: SILICATES
A: Nesosilicates
I: Nesosilicates with OH
1: C small; Beryllite-Euclase-Topaz-Group

Dana 8th edition

52.01.02.01

52: Nesosilicates Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
01: Nesosilicates Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O with cations in [4] coordination

IMA status

Neudefinition von der CNMNC anerkannt

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos, beigeweiß, blassgelb, blassbraun

Streak color

weiß

max. Birefringence

0.016
Birefringence chart\! Sphaerobertrandite title=Birefringence chart Sphaerobertrandite

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

1.597

RI value β

1.607

RI value γ / ε

1.613

Ri mean

1.606

2V angle

Biaxial (-) 70°

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/c

Cell parameters a (Å)

5.081

Cell parameters b (Å)

4.639

Cell parameters c (Å)

17.664

Cell parameters a/b or c/a

1.095

Cell parameters c/b

3.808

Cell parameters α

90°

Cell parameters β

106.8

Cell parameters γ

90°

Z

4

Volumne (ų)

398.584

X-Ray Powder Diffraction

4.885(90),
4.236(60),
3.781(50),
3.161(100),
2.836(70),
2.538(50),
2.318(90),
2.174(50)
XRD chart Sphaerobertrandite

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)

5

VHN (Hardness Vickers)

390 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.52 (berechnet)

2.552 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen {001}

Fracture

uneben

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Lovozero/Sengischorr

Preface

Author (Name, Year)

Semenov, 1957

References

European Journal of Mineralogy 15 (2003), 157

Other languages

Spanish

Esferobertrandita

German

Sphaerobertrandit

French

Sphaerobertrandite

English

Sphaerobertrandite

Russian

Сферобертрандит

Simplified Chinese

球羟硅铍石

Traditional Chinese

球羥矽鈹石

Alternative Name

Spanish

Sphaerobertrandita

CNMNC symbol

Symbol

Sbtd

Locations with GPS information

IDs

GUSID (Global unique identifier short form) kIyr-wOwmEyQ0HcbkLkCjw
GUID (Global unique identifier) FBAB8C90-B003-4C98-90D0-771B90B9028F
Database ID 3587