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Dellaite (Dellait)

Pictures (1 Images total)

Dellait
Views (File:
1479038087
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Dellait
von der Mina Negra, Maconi, Municipio de Cadereyta, Queretaro, Mexiko; körnig, farblos; BB = 3,0 mm
Copyright: Hannes Osterhammer; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A000306, Donator: Klaus Fleck
Location: Mexiko/Queretaro/Cadereyta, Municipio/Maconi/Negra Mine
Mineral: Dellaite
Image: 1479038087
License: Usage for Mineralienatlas project only
Dellait (SNr: A000306)

von der Mina Negra, Maconi, Municipio de Cadereyta, Queretaro, Mexiko; körnig, farblos; BB = 3,0 mm
Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2016-11-13
Locality: Negra Mine / Maconi / Cadereyta, Municipio / Queretaro / Mexiko

You find additional Dellait specimen at the Geolitho Museum

Collectors Summary

Color farblos
Streak color weiß
Crystal System triklin, P1

Chemism

Chemical formula

Ca6Si3O11(OH)2

Chemical composition

Calcium, Silicium, Sauerstoff, Wasserstoff

Unit weight: 534.735474 u; Number of atoms in the formula: 24

Info

Empirical formula:

Ca6Si3O11(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.38

2

8.33

1.0079470

2.0158940
Oxygen

O

38.90

13

54.17

15.9994300

207.9925900
Silicon

Si

15.76

3

12.50

28.0855300

84.2565900
Calcium

Ca

44.97

6

25.00

40.0784000

240.4704000

Analysis wt%

SiO2 : 33.71, CaO : 62.92, H2O : 3.37 (Ref: Mineralogical Magazine 2011)

Strunz 9th edition incl. updates

9.BG.45

9: Silikate (Germanate)
B: Gruppensilikate (Sorosilikate)
G: Gruppen(Soro)-Silikate mit gemischten SiO4 und Si2O7 Gruppen; Kationen in oktahedraler [6] und größerer Koordination
45:Dellait-Gruppe

Lapis Classification

VIII/C.22-010

VIII: SILIKATE
C: Gruppensilikate
22: Mischstrukturen mit [SiO4] 4--Inseln und [Si2O7] 6--Gruppen

Classification by Hölzel

9.BN.815

9: SILICATES
B: Sorosilicates
N: With SiO4 + Si2O7
8: Not classified

Dana 8th edition

78.01.04.01

78: Unclassified Silicate Minerals
01: Unclassified silicates possible nesosilicates

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos

Streak color

weiß

max. Birefringence

0.010
Birefringence chart\! Dellaite title=Birefringence chart Dellaite

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

1.650

RI value β

1.661

RI value γ / ε

1.664

Ri mean

1.658

2V angle

Biaxial (-) 50°

Crystallography

Crystal System

triklin

Class (H-M)

1

Space Group number

2

Space Group

P1

Cell parameters a (Å)

6.815

Cell parameters b (Å)

6.934

Cell parameters c (Å)

12.882

Cell parameters a/b or c/a

0.983

Cell parameters c/b

1.858

Cell parameters α

90.67

Cell parameters β

97.70

Cell parameters γ

98.13

Z

2

Volumne (ų)

596.898

X-Ray Powder Diffraction

6.90(20),
3.435(70),
3.349(20),
3.258(20),
3.067(50),
2.986(40),
2.823(30),
2.290(100)
XRD chart Dellaite

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

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

2.97 (berechnet)

2.975 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

UK/Schottland/Highland/Ardnamurchan/Kilchoan

Preface

Author (Name, Year)

Agrell, 1965

References

Mineralogical Magazine 34 (1965), 1

Other languages

German

Dellait

English

Dellaite

French

Dellaite

Spanish

Dellaíta

Russian

Деллаит

CNMNC (IMA)-Number

IMA 1964-005

CNMNC symbol

Symbol

Dll

Locations with GPS information