Butschliite Mineral Data

General Butschliite Information

Chemical Formula:

K2Ca(CO3)2

Composition:

Molecular Weight = 238.29 gm

Potassium 32.82 % K 39.53 % K₂O

Calcium 16.82 % Ca 23.53 % CaO

Carbon 10.08 % C 36.94 % CO₂

Oxygen 40.29 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

K₂Ca(CO₃)₂

Environment:

Occurs in the clinkers of melted wood ash found in partly burned trees, mainly hemlock and fir, in the forests of the western United States. Dimorphous with fairchildite.

IMA Status:

Valid Species (Pre-IMA) 1947

Locality:

Link to MinDat.org Location Data.

Name Origin:

Named for Johann Adam Otto Butschli (1848-1920), professor of zoology, Heidelberg, Germany, who studied the double carbonates of K and Ca.

Name Pronunciation:

Butschliite + Pronunciation

Synonym:

Buetschliite

Butschliite Image

Images:

Butschliite

Comments: Slightly fibrous to granular massive butschliite.
Location: Near Shavings Lake, Renfrew County, Ontario, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Butschliite Crystallography

Axial Ratios:

a:c = 1:3.38289

Cell Dimensions:

a = 5.38, c = 18.2, Z = 3; V = 456.21 Den(Calc)= 2.60

Crystal System:

Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m

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

By Intensity(I/I_o): 2.86(1), 3.02(0.3), 1.044(0.2),1.614(0.2), 1.69(0.2), 0.933(0.2), 2.07(0.1), 2.69(0.1),

Physical Properties of Butschliite

Cleavage:

{0001} Distinct

Color:

White.

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Optical Properties of Butschliite

Gladstone-Dale:

CI calc= 0.024 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2,KC= 0.2048
Ncalc = 1.53

Optical Data:

Uniaxial (?), a=1.445, b=1.595, bire=0.1500.

Calculated Properties of Butschliite

Electron Density:

Bulk Density (Electron Density)=2.57 gm/cc
note: Specific Gravity of Butschliite =2.60 gm/cc.

Fermion Index:

Fermion Index = 0.0015686955
Boson Index = 0.9984313045

Photoelectric:

PE_Butschliite= 5.47 barns/electron
U=PE_Butschliite x r_electron= 14.10 barns/cc.

Radioactivity:

GRapi = 468.92 (Gamma Ray American Petroleum Institute Units)
Concentration of Butschliite per GRapi unit = 0.21 (%)

Estimated Radioactivity from Butschliite - barely detectable

Butschliite Classification

Dana Class:

14.03.01.01 (14)Anhydrous Carbonates

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

(14.03.01)Dana Group

14.03.01.01 Butschliite K2Ca(CO3)2 R 3m 3 2/m

Strunz Class:

05.AC.15 05 - CARBONATES (NITRATES)

05.A - Carbonates without additional anions, without H2O

05.AC -Alkali and alkali-earth carbonates

05.AC.15 Butschliite K2Ca(CO3)2 R 3m 3 2/m

Other Butschliite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Butschliite :
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

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

Butschliite

K2Ca(CO3)2
Dana No: 14.03.01.01 Strunz No: 05.AC.15
Locality:

Notes:

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