Butschliite Mineral Data

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.

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 ScalenohedralH-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),

Crystal Structure:

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Pabst A , American Mineralogist , 59 (1974) p.353-358, Synthesis, properties and structure of K2Ca(CO3)2, buetschliite

View Additional jPOWD Structure files for Butschliite
[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

Optical Data:

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

Calculated Properties of Butschliite

Electron Density:

r_electron=2.57 gm/cc
note: r_Butschliite=2.60 gm/cc.

Fermion Index

Fermion Index = 0.00156
Boson Index = 0.99844

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)

Estimated Radioactivity from Butschliite - barely detectable

Butschliite Classification

Dana Class:

14.3.1.1 (14)Anhydrous Carbonates

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

(14.3.1)Dana Group

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

Strunz Class:

V/B.05-60 V - Nitrates, Carbonates and Borates

V/B - Waterfree carbonates [CO3]2- without unfamiliar anions

V/B.05 - Eitelie - Shortite - Carbocernaite series

V/B.05-10 Eitelite Na2Mg(CO3)2 R 3 3

V/B.05-20 Nyerereite Na2Ca(CO3)2 C mc2₁ mm2

V/B.05-30 Natrofairchildite Na2Ca(CO3)2 P 6₃/mmc 6/m 2/m 2/m

V/B.05-40 Gregoryite (Na2,K2,Ca)CO3 P 6₃mc 6mm

V/B.05-50 Fairchildite K2Ca(CO3)2 P 6₃/mmc 6/m 2/m 2/m

V/B.05-55 Zemkorite (Na,K)2Ca(CO3)2 P 6₃/mmc, P 6₃mc, P 6₂c- Hex

V/B.05-60 Butschliite K2Ca(CO3)2 R 3m 3 2/m

V/B.05-70 Shortite Na2Ca2(CO3)3 Amm2 mm2

V/B.05-80 Sahamalite-(Ce) (Mg,Fe)Ce2(CO3)4 P 2₁/a 2/m

V/B.05-90 Remondite-(Ce) Na3(Ce,La,Ca,Na,Sr)3(CO3)5 P 2₁ 2

V/B.05-92 Remondite-(La)! Na3(La,Ce,Ca)3(CO3)5 P 2₁ 2

V/B.05-95 Petersenite-(Ce) (Na,Ca)4(Ce,La,Nd)2(CO3)5 P 2₁ 2

V/B.05-98 Calcioburbankite Na3(Ca,REE,Sr)3(CO3)5 P 6₃mc 6mm

V/B.05-100 Burbankite (Na,Ca)3(Sr,Ba,Ce)3(CO3)5 P 6₃/mmc 6/m 2/m 2/m

V/B.05-110 Khanneshite (NaCa)3(Ba,Sr,Ce,Ca)3(CO3)5 P 6₃mc 6mm

V/B.05-120 Carbocernaite (Ca,Na)(Sr,Ce,Ba)(CO3)2 P mc2₁ mm2

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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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

Butschliite

K2Ca(CO3)2
Dana No: 14.3.1.1 Strunz No: V/B.05-60
Locality:

Notes: