Earlandite Mineral Data

Earlandite Mineral Data +

General Earlandite Information

Chemical Formula:

Ca3(C6H5O7)·4(H2O)

Composition:

Molecular Weight = 570.50 gm

Calcium 21.08 % Ca

Hydrogen 3.18 % H

Carbon 25.26 % C

Oxygen 50.48 % O

______

100.00 %

Empirical Formula:

Ca₃2(C₆)2(H₅)2(O₇)·4(H₂O)

Environment:

Ocean bottom sample at 2,580 meters.

IMA Status:

Valid Species (Pre-IMA) 1936

Locality:

Weddell sea, Antarctica. Link to MinDat.org Location Data.

Name Origin:

Named for Arthur Earland, English oceanographer.

Synonym:

Sodium Citrate

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Earlandite Crystallography

Axial Ratios:

a:b:c =5.2175:1:1.7807

Cell Dimensions:

a = 30.94, b = 5.93, c = 10.56, Z = 4; beta = 93.74° V = 1,933.36 Den(Calc)= 1.96

Crystal System:

MonoclinicSpace Group: Unk

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

By Intensity(I/I_o): 15.5(1), 7.7(0.5), 5.2(0.35),

Physical Properties of Earlandite

Color:

White, Light yellow.

Density:

1.95

Habit:

Nodular - Tuberose forms having irregular protuberances over the surface.

Streak:

white

Optical Properties of Earlandite

Optical Data:

Biaxial (+), a=1.52, b=1.53, g=1.58, bire=0.0600, 2V(Calc)=50, 2V(Meas)=60.

Calculated Properties of Earlandite

Electron Density:

r_electron=2.02 gm/cc
note: r_Earlandite=1.96 gm/cc.

Fermion Index

Fermion Index = 0.00331
Boson Index = 0.99669

Photoelectric:

PE_Earlandite= 2.72 barns/electron
U=PE_Earlandite x r_electron= 5.49 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Earlandite is Not Radioactive

Earlandite Classification

Dana Class:

50.2.2.1 (50)Salts of Organic Acids

(50.2)(Mellitates, Citrates, Cyanates, and Acetates)

(50.2.2)Dana Group

50.2.2.1 Earlandite Ca3(C6H5O7)·4(H2O) Unk Mono

Strunz Class:

IX/A.02-30 IX - Organic compunds

IX/A - Salts from organic acids. Other organic salts, a.o. mellates and citrates.

IX/A.02 - Mellite - Abelsonite (?) series

IX/A.02-03 Dashkovaite! Mg(HCOO)2·2(H2O) P 2₁/c 2/m

IX/A.02-05 Formicaite! Ca(HCOO)2 P 4₁2₁2 4 2 2

IX/A.02-10 Mellite Al2[C6(COO)6]·16(H2O) P 4₁22,P 4₃22 4 2 2

IX/A.02-16 Hoganite! Cu(CH3COO)2·H2O C 2/c 2/m

IX/A.02-18 Paceite! CaCu(CH3COO)4·6(H2O) I 4/m 4/m

IX/A.02-20 Calclacite Ca[Cl2/CH3COO]·10(H2O) P 2₁/a 2/m

IX/A.02-30 Earlandite Ca3(C6H5O7)·4(H2O) Unk Mono

IX/A.02-40 Kafehydrocyanite* K4Fe(CN)6·3(H2O) I 4₁/a 4/m

IX/A.02-50 Julienite* Na2Co(SCN)4·8(H2O) P 4₁/n 4/m

IX/A.02-60 Abelsonite NiC31H32N4 P1 or P1 Tri

Other Earlandite Information

References:

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

See Also:

Links to other databases for Earlandite :
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 Earlandite Specimen Label here :

Earlandite

Ca3(C6H5O7)·4(H2O)
Dana No: 50.2.2.1 Strunz No: IX/A.02-30
Locality:

Notes: