Zemkorite Mineral Data

Advertisment

John Betts - Fine Minerals, New York. Dealers of Fine Minerals and Natural Crystal Clusters since 1989. We buy rock collections, we buy gem collections, we buy mineral collections.

Weinrich Minerals, A Dealer in Fine Mineral Specimens - Since 1989. We buy collections and single high quality specimens.

A Bijoux.com is an online store specialized in the sale on the internet of precious stones , gems , minerals and jewels for individuals and professionals

General Zemkorite Information

Chemical Formula:

(Na,K)2Ca(CO3)2

Composition:

Molecular Weight = 217.22 gm

Potassium 5.40 % K 6.50 % K₂O

Sodium 19.05 % Na 25.68 % Na₂O

Calcium 20.30 % Ca 28.40 % CaO

Carbon 11.06 % C 40.52 % CO₂

Oxygen 44.19 % O

______ ______

100.00 % 101.10 % = TOTAL OXIDE

Empirical Formula:

Na_1.8K_0.3Ca_1.1(CO₃)₂

Environment:

Fracture fillings in unaltered diamondiferous kimberlite found in drill cores.

IMA Status:

Approved IMA 1988

Locality:

Udachnaya pipe, Daldyn kimberlite field, Yakutiya, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the Institute of the Earth's Crust (Russian: zemnoy kory = "earth's crust"), Russian Academy of Science, Siberian Branch where the mineral was first studied.

Name Pronunciation:

Zemkorite + Pronunciation

Search for Zemkorite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Zemkorite Crystallography

Axial Ratios:

a:c = 1:1.26441

Cell Dimensions:

a = 10.06, c = 12.72, Z = 8; V = 1,114.84 Den(Calc)= 2.59

Crystal System:

HexagonalSpace Group: P 6₃/mmc, P 6₃mc, P 6₂c-

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.06(1)(402,106), 4.36(1)(200), 3.04(1)(203),2.52(1)(220), 6.36(0.9)(002), 1.797(0.8)(404), 2.18(0.7)(400), 3.18(0.6)(004,211),

Physical Properties of Zemkorite

Cleavage:

{???} Perfect

Color:

Colorless.

Density:

2.46

Diaphaneity:

Transparent

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Fan Shaped - Occurs as radiating crystals shaped like a fan.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

2 - Gypsum

Luster:

Vitreous - Pearly

Streak:

white

Optical Properties of Zemkorite

Gladstone-Dale:

CI meas= -0.031 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.021 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2023,KPDmeas= 0.213,KC= 0.2067
Ncalc = 1.51 - 1.54

Optical Data:

Uniaxial (-), e=1.513, w=1.535, bire=0.0220.

Calculated Properties of Zemkorite

Electron Density:

Bulk Density (Electron Density)=2.56 gm/cc
note: Specific Gravity of Zemkorite =2.59 gm/cc.

Fermion Index:

Fermion Index = 0.0017091047
Boson Index = 0.9982908953

Photoelectric:

PE_Zemkorite= 3.48 barns/electron
U=PE_Zemkorite x r_electron= 8.91 barns/cc.

Radioactivity:

GRapi = 77.11 (Gamma Ray American Petroleum Institute Units)
Concentration of Zemkorite per GRapi unit = 1.30 (%)

Estimated Radioactivity from Zemkorite - barely detectable

Zemkorite Classification

Dana Class:

14.03.03.02 (14)Anhydrous Carbonates

(14.03)with Compound Formula A+2 B++ (CO3)2

(14.03.03)Fairchildite Series

14.03.03.01 Fairchildite K2Ca(CO3)2 P 6₃/mmc 6/m 2/m 2/m

14.03.03.02 Zemkorite (Na,K)2Ca(CO3)2 P 6₃/mmc, P 6₃mc, P 6₂c- Hex

Strunz Class:

05.AC.10 05 - CARBONATES (NITRATES)

05.A - Carbonates without additional anions, without H2O

05.AC -Alkali and alkali-earth carbonates

05.AC.10 Nyerereite Na2Ca(CO3)2 C mc2₁ mm2

05.AC.10 Natrofairchildite Na2Ca(CO3)2 P 6₃/mmc 6/m 2/m 2/m

05.AC.10 Zemkorite (Na,K)2Ca(CO3)2 P 6₃/mmc, P 6₃mc, P 6₂c- Hex

Other Zemkorite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Am.Min.,Vol.75,p933,1990)

See Also:

Links to other databases for Zemkorite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

Search for Zemkorite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Zemkorite :

A Bijoux Google Search for Zemkorite
Dakota Matrix Minerals Google Search for Zemkorite
John Betts Fine Minerals Search for Zemkorite
McDougall Minerals Google Search for Zemkorite
Rock and Mineral Shows Google Search for Zemkorite
Weinrich Minerals, Inc. Google Search for Zemkorite

Ask about Zemkorite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Zemkorite Specimen Label here :

Zemkorite

(Na,K)2Ca(CO3)2
Dana No: 14.03.03.02 Strunz No: 05.AC.10
Locality:

Notes: