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Dachiardite-K

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Dachiardit-K
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Dachiardit-K
farbloses Aggregat von Dachiardit-K auf Trägermaterial, Austa, Momchilgrad, Kardschali, Bulgarien; BB < 1 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Bulgarien/Kardschali Oblast/Momtschilgrad (Momchilgrad), Obshtina
Mineral: Dachiardite-K
Image: 1621533742
License: Usage for Mineralienatlas project only
Dachiardit-K

farbloses Aggregat von Dachiardit-K auf Trägermaterial, Austa, Momchilgrad, Kardschali, Bulgarien; BB < 1 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2021-05-20
Locality: Momtschilgrad (Momchilgrad), Obshtina / Kardschali Oblast / Bulgarien

Collectors Summary

Color weiß, farblos
Streak color weiß
Lustre Glasglanz
Hardness (Mohs) 4
Cleavages vollkommen
Fracture spröd
Crystal System monoklin, C2/m, Cm, C2

Chemism

Chemical formula

K4(Si20Al4O48)·13H2O

Empirical formula (analysis)

H26.23K1.71Ca1.04Ba0.05Al3.64Si20.24O61

Chemical composition

Aluminium, Silicium, Kalium, Sauerstoff, Wasserstoff

Unit weight: 1784.473637158 u; Number of atoms in the formula: 113.91

Info

Empirical formula:

H26.23K1.71Ca1.04Ba0.05Al3.64Si20.24O61

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

1.48

26.23

23.03

1.0079470

26.4384498
Oxygen

O

54.69

61

53.55

15.9994300

975.9652300
Aluminium

Al

5.50

3.64

3.20

26.9815382

98.2127990
Silicon

Si

31.86

20.24

17.77

28.0855300

568.4511272
Potassium

K

3.75

1.71

1.50

39.0983100

66.8581101
Calcium

Ca

2.34

1.04

0.91

40.0784000

41.6815360
Barium

Ba

0.38

0.05

0.04

137.3277000

6.8663850

Analysis wt%

4.51 K2O, 3.27 CaO, 0.41 BaO, 10.36 A12O3, 67.90 SiO2, 13.2 H2O,
in Nikita V. Chukanov, Svetlana Encheva, Petko Petrov, Igor V. Pekov, Dmitriy I. Belakovskiy, Sergey N. Britvin, Sergey M. Aksenov (2016)

Strunz 9th edition incl. updates

9.GD.40

9: Silikate (Germanate)
G: Gerüstsilikate (Tektosilikate) mit zeolithischem H2O; Familie der Zeolithe
D: Ketten von fünfer-Ringen
40:Dachiardit-Gruppe

Classification by Hölzel

9.FM.300

9: SILICATES
F: Tektosilicates
M: Mordenite-Group

IMA status

anerkannt CNMNC Aug. 2015 - CNMNC Newsletter No. 27 Okt. 2015

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Zeolite group  ⇒ DAC zeolite structure group  ⇒ Dachiardite series

Optical Properties

Color

weiß, farblos

Streak color

weiß

Lustre

Glasglanz

RI value α / ω / n

α = 1.477 (ber.)

RI value β

β = 1.478(2)

RI value γ / ε

γ = 1.481(2)

2V angle

2Vgem. = 65(10)°

Crystallography

Crystal System

monoklin

Class (H-M)

2/m, 2, m

Space Group number

12, 8, 5

Space Group

C2/m, Cm, C2

Cell parameters a (Å)

18.670(8)

Cell parameters b (Å)

7.511(3)

Cell parameters c (Å)

10.231(4)

Cell parameters a/b or c/a

2.486

Cell parameters c/b

1.362

Cell parameters α

90°

Cell parameters β

107.79(3)°

Cell parameters γ

90°

Z

1

Volume (ų)

1366.094

X-Ray Powder Diffraction

9.76(24), 8.85(58),4.985(13),4.870(59),3.807(16), 3.768(20), 3.457(100), 2.966(17)
XRD chart Dachiardite-K

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

Physical Properties

Hardness (Mohs)

4

Density (g/cm³)

2.18(2) gem., 2.169 ber.

2.169 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen

Fracture

spröd

Chemical Properties and Tests

IR Spektrum beschrieben in Nikita V. Chukanov, Svetlana Encheva, Petko Petrov, Igor V. Pekov, Dmitriy I. Belakovskiy, Sergey N. Britvin and Sergey M. Aksenov (2016): die Spektren von Dachiardit-K, -Ca und -Na sind sehr ähnlich.

(Co-)Type locality

(Co-)Type locality

Bulgarien/Kardschali Oblast/Momtschilgrad (Momchilgrad), Obshtina/Zvezdel (Svesdel)/Dachiardite-K Vorkommen

Type material

Earth and Man National Museum, Sofia, Bulgarien

Collection number of type material

23927

Paragenesis of type material

Chalcedon, Opal, Dachiardit-Ca, Dachiardit-Na, Ferrierit-Mg, Ferrierit-K, Klinoptilolith-Ca, Klinoptilolith-K, Mordenit, Smektit, Seladonit, Calcit, Baryt

Preface

Author (Name, Year)

Nikita V. Chukanov, Svetlana Encheva, Petko Petrov, Igor V. Pekov, Dmitriy I. Belakovskiy, Sergey N. Britvin and Sergey M. Aksenov (2016)

References

Chukanov, N.V., Encheva, S., Petrov, P., Pekov, I.V., Belakovskiy, D.I., Britvin, S.N. and Aksenov, S.M. (2015) Dachiardite-K, IMA 2015-041. CNMNC Newsletter No. 27, October 2015, page 1224; Mineralogical Magazine, 79, 1229–1236.

N. V. Chukanov, S. Encheva, P. Petrov, I. V. Pekov, D. I. Belakovskiy, S. N. Britvin, S. M. Aksenov: Dachiardite-K, (K2Ca)(Al4Si20O48) · 13H2O, a new zeolite from Eastern Rhodopes, Bulgaria. Geology of Ore Deposits Jhrg. 58, Nr. 8 (2016) S. 666–673. Zuerst in russ. Sprache publiziert: N.V. Chukanov, S. Encheva, P. Petrov, I.V. Pekov, D.I. Belakovskiy, S.N. Britvin, S.M. Aksenov. Zapiski Rossiiskogo Mineralogicheskogo Obshchestva, 2016, Nr. 1, S. 68–79.

IMA group assignments

 
Zeolite group
 
 
 

 
 
DAC zeolite structure group
 
 
 

 
 
 
Dachiardite series
 
 
 

 
 
 
 
Dachiardite-Ca
(Ca,Na,K)4(Si,Al)24O48·13H2O
monoklin
C2/m

 
 
 
 
Dachiardite-K
K4(Si20Al4O48)·13H2O
monoklin
C2/m, Cm, C2

 
 
 
 
Dachiardite-Na
Na4(Si20,Al4)O48·13H2O
monoklin
C2/m

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Actuality: 15. Sep 2024 - 06:50:35

Other languages

German

Dachiardit-K

English

Dachiardite-K

Russian

Дакиардит-K

CNMNC (IMA)-Number

IMA 2015-041

CNMNC symbol

Symbol

Dac-K

IDs

GUSID (Global unique identifier short form) 1qJgdv2Qu0yEhq4IPiWR-w
GUID (Global unique identifier) 7660A2D6-90FD-4CBB-8486-AE083E2591FB
Database ID 8009