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Gregoryite

Pictures (2 Images total)

Nyerereit-Gregoryit
Views (Image: 1474188746): 676
Nyerereit-Gregoryit

Nyerereit-Gregoryit als Gemengteile in Karbonatlava; Vulkan Oldoinyo Lengai,Tansania; BB: 4 cm.

Collection: Rockhounder
Copyright: Rockhounder
Contribution: Rockhounder 2016-09-18
Locality: Oldoinyo Lengai (Ol Doinyo Lengai) Vulkan / Arusha, Region / Tansania
Gregoryit, Nyerereit
Views (Image: 1634143977): 71
Gregoryit, Nyerereit

Oldoinyo Lengai, Tansania; Bb 7 mm; Probe in zugeschweißtem Glasröhrchen, da Gregoryit keine Feuchtigkeit verträgt.

Collection: Guy Heinen
Copyright: Guy Heinen
Contribution: guyhein 2021-10-13
Locality: Oldoinyo Lengai (Ol Doinyo Lengai) Vulkan / Arusha, Region / Tansania

Collectors Summary

Color weiß
Streak color weiß
Solubility +++ H2O
Crystal System hexagonal, P63mc

Chemism

Chem­ical formula

(Na2,K2,Ca)CO3

Chem­ical com­po­si­tion

Calcium, Natrium, Kalium, Kohlenstoff, Sauerstoff

Unit weight: 115.06362024 u; Number of atoms in the formula: 5.9

Info

Empirical formula:

((Na2)0.6(K2)0.3Ca0.1)CO3

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Carbon

C

10.44

1

16.95

12.0107800

12.0107800

Oxygen

O

41.71

3

50.85

15.9994300

47.9982900

Sodium

Na

23.98

1.2

20.34

22.9897702

27.5877242

Potassium

K

20.39

0.6

10.17

39.0983100

23.4589860

Calcium

Ca

3.48

0.1

1.69

40.0784000

4.0078400

Anal­y­sis wt%

CaO : 9.10, SrO : 0.66, Na2O : 44.87, K2O : 3.95, CO2 : 36.22, SO3 : 4.28, P2O5 : 1.92, F : 0.40, Cl : 0.60 (Ref: Lithos 80)

Strunz 9th edi­tion incl. updates

5.AA.10

5: Carbonate (Carbonate, Nitrate)
A: Carbonate ohne weitere Anionen, ohne H2O
A: Alkali-Carbonate
10:Natrit-Gregoryit-Gruppe

Lapis Clas­sifica­tion

V/B.05-040

V: NITRATE, CARBONATE UND BORATE
B: Wasserfreie Carbonate [CO3] 2-, ohne fremde Anionen

Clas­sifica­tion by Hölzel

5.AB.340

5: CARBONATES NITRATES ARSENITES SULFITES SELENITES TELLURITES IODATES
A: Carbonates (-Anions -Water)
B: Carbonates: hexagonal or trigonal
3: Other Double Carbonates

Dana 8th edi­tion

14.01.02.02

14: Anhydrous Carbonates
01: Anhydrous Carbonates with Simple Formula A+ CO3
02: Vaterite Group

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

weiß

Streak color

weiß

2V angle

Uniaxial

Crystallography

Crystal Sys­tem

hexagonal

Class (H-M)

6mm

Space Group number

186

Space Group

P63mc

Cell param­e­ters a (Å)

5.22

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

6.58

Cell param­e­ters a/b or c/a

1.261

Cell param­e­ters c/b

-

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

120°

Z

2

Volumne (ų)

155.274

X-Ray Pow­der Diffrac­tion

3.72(30),
3.29(40),
2.66(100),
2.61(70),
2.137(40),
1.863(30),
1.707(10),
1.303(10)

XRD chart Gregoryite

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

Crystals 3D

Open larger view

Physical Properties

Density (g/cm³)

2.27 (berechnet)

2.461 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ H2O

Preface

Author (Name, Year)

Gittins & McKie, 1980

References

Lithos 13 (1980), 213

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

Natrite

Na2CO3

monoklin : 2/m : C2/m

5.AA.10

Gregoryite

(Na2,K2,Ca)CO3

hexagonal : 6mm : P63mc

5.AA.10

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

Juangodoyite

Na2Cu(CO3)2

monoklin : 2/m : P21/a

V/B.05-005

Eitelite

Na2Mg(CO3)2

trigonal : 3 : R3

V/B.05-010

Nyerereite

Na2Ca(CO3)2

orthorhombisch : mm2 : Cmc21

V/B.05-020

Gregoryite

(Na2,K2,Ca)CO3

hexagonal : 6mm : P63mc

V/B.05-040

Fairchildite

K2Ca(CO3)2

hexagonal : 6/mmm : P63/mmc

V/B.05-050

Zemkorite

(Na,K)2Ca(CO3)2

hexagonal : 6mm, 6m2, 6/mmm : P63mc, P62c, P63/mmc

V/B.05-055

Bütschliite

K2Ca(CO3)2

trigonal : 3m : R3m

V/B.05-060

Shortite

Na2Ca2(CO3)3

orthorhombisch : mm2 : Amm2

V/B.05-070

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

Khanneshite

(NaCa)3(Ba,Sr,Ce,Ca)3(CO3)5

hexagonal : 6mm : P63mc

5.AB.300

Sanrománite

Na2CaPb3(CO3)5

hexagonal : 6mm : P63mc

5.AB.305

Burbankite

(Na,Ca)3(Sr,Ba,Ce)3(CO3)5

hexagonal : 6mm : P63mc

5.AB.310

Calcioburbankite

Na3(Ca,Ce,La,Sr)3(CO3)5

hexagonal : 6mm : P63mc

5.AB.315

Zemkorite

(Na,K)2Ca(CO3)2

hexagonal : 6mm, 6m2, 6/mmm : P63mc, P62c, P63/mmc

5.AB.320

Fairchildite

K2Ca(CO3)2

hexagonal : 6/mmm : P63/mmc

5.AB.330

Gregoryite

(Na2,K2,Ca)CO3

hexagonal : 6mm : P63mc

5.AB.340

Olekminskite

Sr(Sr,Ca,Ba)(CO3)2

trigonal : 32 : P321

5.AB.360

Paralstonite

BaCa(CO3)2

trigonal : 32 : P321

5.AB.365

Huntite

CaMg3(CO3)4

trigonal : 32 : R32

5.AB.380

Benstonite

(Ba,Sr)6(Ca,Mn)6Mg(CO3)13

trigonal : 3 : R3

5.AB.390

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

Calcite

CaCO3

trigonal : 3m : R3c

14.01.01.01

Magnesite

MgCO3

trigonal : 3m : R3c

14.01.01.02

Siderite

Fe2+CO3

trigonal : 3m : R3c

14.01.01.03

Rhodochrosite

Mn(CO3)

trigonal : 3m : R3c

14.01.01.04

Smithsonite

ZnCO3

trigonal : 3m : R3c

14.01.01.06

Otavite

CdCO3

trigonal : 3m : R3c

14.01.01.07

Gaspéite

(Ni,Mg,Fe2+)CO3

trigonal : 3m : R3c

14.01.01.08

Vaterite

CaCO3

hexagonal : 6/mmm : P63/mmc

14.01.02.01

Gregoryite

(Na2,K2,Ca)CO3

hexagonal : 6mm : P63mc

14.01.02.02

Aragonite

CaCO3

orthorhombisch : mmm : Pmcn

14.01.03.01

Witherite

BaCO3

orthorhombisch : mmm : Pmcn

14.01.03.02

Strontianite

SrCO3

orthorhombisch : mmm : Pmcn

14.01.03.03

Cerussite

PbCO3

orthorhombisch : mmm : Pmcn

14.01.03.04

Rutherfordine

UO2(CO3)

orthorhombisch : mm2 : Imm2

14.01.04.01

Widenmannite

Pb2(OH)2[(UO2)(CO3)2]

orthorhombisch : mmm : Pmmn

14.01.05.01

Natrite

Na2CO3

monoklin : 2/m : C2/m

14.01.06.01

Zabuyelite

Li2CO3

monoklin : 2/m : C2/c

14.01.06.02

Čejkaite

Na4UO2(CO3)3

triklin : 1 : P1 ?

14.01.07.01

CNMNC (IMA)-Number

IMA 1981-045

CNMNC symbol

Symbol

Ggy

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

German pages

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

English pages

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

Russian pages

Webmineral.ru - search for: Грегориит

Mineral Dealer

German pages

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

Locations with GPS information