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Benitoite

Pictures (37 Images total)

Benitoite, Joaquinite
Views (File:
1464948915
): 5403, Rating: 9.71
Benitoite, Joaquinite
Specimen = 31 mm; San Benito County, California; USA
Copyright: Andreas Schmid; Contribution: Andreas Schmid
Collection: Andreas Schmid
Location: USA/Kalifornien (California)/San Benito Co.
Mineral: Benitoite, Joaquinite-(Ce)
Image: 1464948915
Rating: 9.71 (votes: 7)
License: Usage for Mineralienatlas project only
Benitoite, Joaquinite

Specimen = 31 mm; San Benito County, California; USA
Collection: Andreas Schmid
Copyright: Andreas Schmid
Contribution: Andreas Schmid 2016-06-03
Locality: San Benito Co. / Kalifornien (California) / USA
Benitoit
Views (File:
1509700729
): 3989, Rating: 9.13
Benitoit
Bildbreite: 3,4 cm; Fundort: Dallas Gem Mine, New Idria District, San Benito Co., Kalifornien, USA
Copyright: Frédéric Hède (Gluon); Contribution: Hg
Location: USA/Kalifornien (California)/San Benito Co./New Idria District/Dallas Gem Mine Area/Dallas Gem Mine (Benitoite Mine)
Mineral: Benitoite
Image: 1509700729
Rating: 9.13 (votes: 8)
License: Usage for Mineralienatlas project only
Benitoit

Bildbreite: 3,4 cm; Fundort: Dallas Gem Mine, New Idria District, San Benito Co., Kalifornien, USA
Copyright: Frédéric Hède (Gluon)
Contribution: Hg 2017-11-03
Locality: Dallas Gem Mine (Benitoite Mine) / Dallas Gem Mine Area / New Idria District / San Benito Co. / Kalifornien (California) / USA
Benitoite
Views (File:
1458105191
): 2944
Benitoite
Benitoite in matrix rock, from Benitoite Mine, Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA; Size 42 х 39 х 20 mm
Copyright: pegmatite; Contribution: pegmatite
Collection: pegmatite
Location: USA/Kalifornien (California)/San Benito Co./New Idria District/Dallas Gem Mine Area/Dallas Gem Mine (Benitoite Mine)
Mineral: Benitoite
Image: 1458105191
Rating: 9 (votes: 1)
License: Usage for Mineralienatlas project only
Benitoite

Benitoite in matrix rock, from Benitoite Mine, Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA; Size 42 х 39 х ...
Collection: pegmatite
Copyright: pegmatite
Contribution: pegmatite 2016-03-16
Locality: Dallas Gem Mine (Benitoite Mine) / Dallas Gem Mine Area / New Idria District / San Benito Co. / Kalifornien (California) / USA
Benitoit
Views (File:
1509615339
): 3075, Rating: 8.25
Benitoit
Bildbreite: 8,5 cm; Fundort: Dallas Gem Mine, New Idria District, San Benito Co., Kalifornien, USA
Copyright: Frédéric Hède (Gluon); Contribution: Hg
Location: USA/Kalifornien (California)/San Benito Co./New Idria District/Dallas Gem Mine Area/Dallas Gem Mine (Benitoite Mine)
Mineral: Benitoite
Image: 1509615339
Rating: 8.25 (votes: 4)
License: Usage for Mineralienatlas project only
Benitoit

Bildbreite: 8,5 cm; Fundort: Dallas Gem Mine, New Idria District, San Benito Co., Kalifornien, USA
Copyright: Frédéric Hède (Gluon)
Contribution: Hg 2017-11-02
Locality: Dallas Gem Mine (Benitoite Mine) / Dallas Gem Mine Area / New Idria District / San Benito Co. / Kalifornien (California) / USA
blaue Benitoit XX mit schwarzen Neptunit XX
Views (File:
1206048835
): 3093
blaue Benitoit XX mit schwarzen Neptunit XX
Größe: 14.7 x 10.7 x 2.3 cm; Fundort: Dallas Gem Mine, New Idria District, San Benito Co., Kalifornien, USA
Copyright: Rob Lavinsky; Contribution: Philip Blümner
Location: USA/Kalifornien (California)/San Benito Co./New Idria District/Dallas Gem Mine Area/Dallas Gem Mine (Benitoite Mine)
Mineral: Benitoite
Image: 1206048835
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
blaue Benitoit XX mit schwarzen Neptunit XX

Größe: 14.7 x 10.7 x 2.3 cm; Fundort: Dallas Gem Mine, New Idria District, San Benito Co., Kalifornien, USA
Copyright: Rob Lavinsky
Contribution: Philip Blümner 2008-03-20
Locality: Dallas Gem Mine (Benitoite Mine) / Dallas Gem Mine Area / New Idria District / San Benito Co. / Kalifornien (California) / USA

You find additional specimen at the Geolitho Museum

Collectors Summary

Color blau, purpurfarben, rosa, weiß, farblos
Streak color weiß
Hardness (Mohs) 6.25
Solubility +++ HF, +- konz. HCl, - verdünnte HCl
Crystal System hexagonal, P6c2

Chemism

Chemical formula

BaTiSi3O9

Chemical composition

Barium, Silicium, Titan, Sauerstoff

Unit weight: 413.44626 u; Number of atoms in the formula: 14

Info

Empirical formula:

BaTiSi3O9

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

34.83

9

64.29

15.9994300

143.9948700
Silicon

Si

20.38

3

21.43

28.0855300

84.2565900
Titanium

Ti

11.58

1

7.14

47.8671000

47.8671000
Barium

Ba

33.22

1

7.14

137.3277000

137.3277000

Analysis wt%

Ø SiO2 : 43.10, TiO2 : 19.51, BaO : 37.23 (Ref: American Mineralogist 72)

Strunz 9th edition incl. updates

9.CA.05

9: Silikate (Germanate)
C: Ringsilikate (Cyclosilikate)
A: ~[Si3O9]6- dreier-Einfachringe, ohne inselartig, komplexe [Anionen]
05:Walstromit-Gruppe

Lapis Classification

VIII/E.01-010

VIII: SILIKATE
E: Ringsilikate
1: Dreierringe [Si3O9] 6-

Classification by Hölzel

9.CA.100

9: SILICATES
C: Cyclosilicates
A: ~[Si3O9]6--Rings
1: Hexagonal, with Ti,Zr,Sn Benitoite-Group

Dana 8th edition

59.01.01.02

59: Cyclosilicate Minerals
01: Cyclosilicates Cyclosilicate Three-Membered Rings anhydrous, no other anions
01: Benitoite group

IMA status

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Mineral status

anerkanntes Mineral

Optical Properties

Color

blau, purpurfarben, rosa, weiß, farblos

Streak color

weiß

max. Birefringence

0.047
Birefringence chart\! Benitoite title=Birefringence chart Benitoite

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

1.757

RI value γ / ε

1.804

Ri mean

1.773

2V angle

Uniaxial (+)

Optical Data Luminescence

Luminescence

fluoreszierend, Kurzwelliges UV=blau

Color LW-UV (365nm)

  

rot

LW-UV Intensity

schwach

LW-UV Observation Frequency

selten

Color SW-UV (254nm)

  

bläulich weiß

SW-UV Intensity

sehr stark

SW-UV Observation Frequency

immer

Most Common Activator

TiO6

Other Activators

Cr3+, Fe3+, Ti3+, Ti4+, Cu+, Mn4+, Ti - O

SW-UV Afterglow Intensity

keine mit bloßem Auge

Crystallography

Crystal System

hexagonal

Class (H-M)

6m2

Space Group number

188

Space Group

P6c2

Cell parameters a (Å)

6.641

Cell parameters b (Å)

-

Cell parameters c (Å)

9.760

Cell parameters a/b or c/a

1.470

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

2

Volume (ų)

372.776

X-Ray Powder Diffraction

5.75(40),
3.733(100),
2.883(30),
2.771(60),
2.252(30),
2.179(20),
1.788(40),
1.628(80)
XRD chart Benitoite

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)

6.25

VHN (Hardness Vickers)

850 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.6

3.683 ( ρ calc. Mineralienatlas )

Instability

+++ HF, +- konz. HCl, - verdünnte HCl

(Co-)Type locality

(Co-)Type locality

USA/Kalifornien (California)/San Benito Co./New Idria District/Dallas Gem Mine Area/Dallas Gem Mine (Benitoite Mine)

Preface

Name from

der Fundstelle in San Benito Co., Californien

Author (Name, Year)

Louderback, 1907

References

Handbook of Mineralogy (Anthony et al.), 2 (1995), 74

Other languages

Dutch

Benitoiet

Finnish

Benitoiitti

German

Benitoit

Lithuanian

Benitoitas

English

Benitoite

French

Benitoite

Spanish

Benitoíta

Portuguese

Benitoíte

Russian

Бенитоит

Japanese

ベニト石

Simplified Chinese

蓝锥矿

Traditional Chinese

藍錐礦

Alternative Name

Benitoide

CNMNC symbol

Symbol

Bni

Navigation

Locations with GPS information

IDs

GUSID (Global unique identifier short form) -8uN-FVMs0CdioseK45JHA
GUID (Global unique identifier) F88DCBFB-4C55-40B3-9D8A-8B1E2B8E491C
Database ID 353