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Tunellite (Tunellit)

Pictures (4 Images total)

Tunellit
Views (Image: 1340732200): 833
Tunellit

Größe: 76x57 mm; Fundort: Boron, Kern Co., Kalifornien, USA

Copyright: Jewels-Fine-Minerals
Contribution: slugslayer 2012-06-26
Locality: Boron / Kramer District / Kern Co. / Kalifornien (California) / USA
Tunellit
Views (Image: 1423827322): 647
Tunellit

Größe: 47x42x24 mm; Fundort: U. S. Borax Open Pit, Boron, Kern Co., Kalifornien, USA

Copyright: Bob Griffis Minerals
Contribution: slugslayer 2015-02-13
Locality: U.S. Borax Open Pit (Boron Pit, Rio Tinto Borax Mine) / U.S. Borax Mine / Kramer Boratlagerstätte / Boron / Kramer District / Kern Co. / Kalifornien (California) / USA
Tunellit
Views (Image: 1423827343): 489
Tunellit

Größe: 56x49x33 mm; Fundort: U. S. Borax Open Pit, Boron, Kern Co., Kalifornien, USA

Copyright: Bob Griffis Minerals
Contribution: slugslayer 2015-02-13
Locality: U.S. Borax Open Pit (Boron Pit, Rio Tinto Borax Mine) / U.S. Borax Mine / Kramer Boratlagerstätte / Boron / Kramer District / Kern Co. / Kalifornien (California) / USA
Tunellit
Views (Image: 1467230669): 383
Tunellit (SNr: A002598)

Tafeliger farbloser Kristall, der ganze Kristall im Durchlicht, Bb = 15 mm; Fundort: Boraxo Mine, Ryan Area, Death Valley National Park, Inyo Co., Kalifornien, USA.

Collection: Lithothek der Münchener Micromounter
Copyright: Manfred Früchtl
Contribution: Münchener Micromounter 2016-06-29
Locality: Boraxo Mine / Ryan Area / Death Valley National Park / Inyo Co. / Kalifornien (California) / USA

Collectors Summary

Color farblos
Streak color weiß
Hardness (Mohs) 2.5
Solubility +++ Säuren, Alkalien - H2O
Crystal System monoklin, P21/a

Chemism

Chem­ical formula

SrB6O9(OH)2·3H2O

Chem­ical com­po­si­tion

Strontium, Bor, Sauerstoff, Wasserstoff

Unit weight: 384.546796 u; Number of atoms in the formula: 29

Info

Empirical formula:

SrB6O9(OH)2·3H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

2.10

8

27.59

1.0079470

8.0635760

Boron

B

16.87

6

20.69

10.8117000

64.8702000

Oxygen

O

58.25

14

48.28

15.9994300

223.9920200

Strontium

Sr

22.79

1

3.45

87.6210000

87.6210000

Anal­y­sis wt%

B2O3 : 53.70, SrO : 27.91, H2O : 18.71 (Ref: USGS 61)

Strunz 9th edi­tion incl. updates

6.FC.05

6: Borate
F: Hexaborate
C: Schicht(Phyllo)-Hexaborate
05:Tunellit-Gruppe

Lapis Clas­sifica­tion

V/K.06-020

V: NITRATE, CARBONATE UND BORATE
K: Schichtborate mit komplexen Baugruppen [Bx(O,OH)y]

Clas­sifica­tion by Hölzel

6.FC.120

6: Borates
F: Hexaborates
C: Phyllohexaborates
1: Nobleite-Group - 6(3P+3T)

Dana 8th edi­tion

26.06.06.02

26: Hydrated Borates Containing Hydroxyl or Halogen
06: 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

0.050

Birefringence chart\! Tunellite title=Birefringence chart Tunellite

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

1.519

RI value β

1.534

RI value γ / ε

1.569

Ri mean

1.541

2V angle

Biaxial (+) 68°

Optical Data Luminescence

Color LW-UV (365nm)

 

gelb

Color SW-UV (254nm)

 

gelb

After­glow (Per­sistant Lumi­nes­cence)

keine Daten

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/a

Cell param­e­ters a (Å)

14.390

Cell param­e­ters b (Å)

8.213

Cell param­e­ters c (Å)

9.934

Cell param­e­ters a/b or c/a

1.752

Cell param­e­ters c/b

1.210

Cell param­e­ters α

90°

Cell param­e­ters β

114.3

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

1070.033

X-Ray Pow­der Diffrac­tion

6.78(10),
6.57(100),
5.138(10),
4.525(10),
3.867(10),
3.592(10),
3.045(10),
2.503(10)

XRD chart Tunellite

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)

2.40 (gemessen)

2.387 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ Säuren, Alkalien - H2O

Preface

Author (Name, Year)

Erd & Morgan & Clark, 1961

References

United States Geological Survey, Professional Paper 424C (1961), 294

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Nobleite

CaB6O9(OH)2·3H2O

monoklin : 2/m : P21/a

6.FC.05

Tunellite

SrB6O9(OH)2·3H2O

monoklin : 2/m : P21/a

6.FC.05

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Nobleite

CaB6O9(OH)2·3H2O

monoklin : 2/m : P21/a

V/K.06-010

Tunellite

SrB6O9(OH)2·3H2O

monoklin : 2/m : P21/a

V/K.06-020

'Balavinskite'

Sr2B6O11·4H2O

V/K.06-030

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Nobleite

CaB6O9(OH)2·3H2O

monoklin : 2/m : P21/a

6.FC.100

Tunellite

SrB6O9(OH)2·3H2O

monoklin : 2/m : P21/a

6.FC.120

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Rivadavite

Na6MgB24O40·22H2O

monoklin : 2/m : P21/c

26.06.01.01

Mcallisterite

Mg2B12O14(OH)12·9H2O

trigonal : 3m : R3c

26.06.02.01

Admontite

MgB6O10·7H2O

monoklin : 2/m : P21/c

26.06.03.01

Aksaite

MgB6O7(OH)6·2H2O

orthorhombisch : mmm : Pbca

26.06.04.01

Aristarainite

Na2MgB12O20·10H2O

monoklin : 2/m : P21/a

26.06.05.01

Nobleite

CaB6O9(OH)2·3H2O

monoklin : 2/m : P21/a

26.06.06.01

Tunellite

SrB6O9(OH)2·3H2O

monoklin : 2/m : P21/a

26.06.06.02

Ginorite

Ca2B14O23·8H2O

monoklin : 2/m : P21/a

26.06.07.01

Strontioginorite

(Sr,Ca)2B14O23·8H2O

monoklin : 2/m : P21/a

26.06.07.02

Other languages

German

Tunellit

Spanish

Tunellita

English

Tunellite

French

Tunellite

Russian

Танелит

Simplified Chinese

四水锶硼石

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Tunellit
Google-Bilder-Suche - search for: Tunellit
Mineralogisch-Petrographisches-Institut Hamburg - search for: Tunellit

English pages

Mindat - search for: Tunellite
Webmineral - search for:Tunellite
Handbook-of-Mineralogy - search for: Tunellite
RRUFF - Raman, XRD and other mineral data - search for: Tunellite
RRUFF - References and PDF downloads - search for: Tunellite
American-Mineralogist-Crystal-Structure-Database - search for: Tunellite
Athena - search for: Tunellite

Russian pages

Webmineral.ru - search for: Танелит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Tunellit
Crystal-Treasure.com - search for: Tunellit
Bosse - search for: Tunellit

Locations with GPS information