Rauenthalite Mineral Data

Rauenthalite Mineral Data +

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General Rauenthalite Information

Chemical Formula:

Ca3(AsO4)2·10(H2O)

Composition:

Molecular Weight = 578.23 gm

Calcium 20.79 % Ca 29.09 % CaO

Arsenic 25.91 % As 39.75 % As₂O₅

Hydrogen 3.49 % H 31.16 % H₂O

Oxygen 49.81 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₃(AsO₄)₂·10(H₂O)

IMA Status:

Approved IMA 1964

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 36047

PDF 35-569

Rauenthalite Image

Images:

Rauenthalite

Comments: Bright white botryoidal to transparent colorless prismatic rauenthalite microcrystals.
Location: Gabe Gottes, Sainte-Marie-aux-Mines, Alsace, Haute-Rhin, France. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Rauenthalite Crystallography

Axial Ratios:

a:b:c =1.0324:1:0.509

Cell Dimensions:

a = 12.564, b = 12.169, c = 6.195, Z = 2; alpha = 89.09°, beta = 79.69°, gamma = 118.58° V = 818.22 Den(Calc)= 2.35

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 10.8(1), 3.36(0.8), 2.44(0.6),

Physical Properties of Rauenthalite

Cleavage:

None

Color:

Colorless, Snow white.

Density:

2.36

Streak:

white

Optical Properties of Rauenthalite

Gladstone-Dale:

CI meas= -0.014 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.019 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2357,KPDmeas= 0.2347,KC= 0.2314

Optical Data:

Biaxial (+), a=1.54, b=1.552, g=1.57, bire=0.0300, 2V(Calc)=80, 2V(Meas)=85.

Calculated Properties of Rauenthalite

Electron Density:

r_electron=2.37 gm/cc
note: r_Rauenthalite=2.36 gm/cc.

Fermion Index

Fermion Index = 0.00052
Boson Index = 0.99948

Photoelectric:

PE_Rauenthalite= 19.38 barns/electron
U=PE_Rauenthalite x r_electron= 45.88 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Rauenthalite is Not Radioactive

Rauenthalite Classification

Dana Class:

40.3.11.1 (40)Hydrated Phosphates, etc

(40.3)where (A++)3 (XO4)2 · x(H2O)

(40.3.11)Dana Group

40.3.11.1 Rauenthalite Ca3(AsO4)2·10(H2O) P1 1

Strunz Class:

VII/C.24-70 VII - Phosphates, Arsenates and Vanadates

VII/C - Water-bearing phosphates without unfamiliar anions, cations of medium and big size: Fe, Mn, Zn, Mg and Ca, (NH4)1+

VII/C.24 - Haidingerite - Picropharmacolite series

VII/C.24-10 Haidingerite Ca(AsO3OH)·(H2O) Pcnb 2/m 2/m 2/m

VII/C.24-20 Mcnearite NaCa5H4(AsO4)5·4(H2O) P1,P 1 Tri

VII/C.24-30 Irhtemite Ca4Mg(AsO3OH)2(AsO4)2·4(H2O) Unk Mono

VII/C.24-40 Vladimirite Ca5(AsO3OH)2(AsO4)2·5(H2O) P 2₁/c 2/m

VII/C.24-50 Ferrarisite Ca5(AsO3OH)2(AsO4)2·9(H2O) P1 1

VII/C.24-60 Guerinite Ca5(AsO3OH)2(AsO4)2·9(H2O) P 2₁/n 2/m

VII/C.24-70 Rauenthalite Ca3(AsO4)2·10(H2O) P1 1

VII/C.24-80 Phaunouxite Ca3(AsO4)·11(H2O) P1 1

VII/C.24-90 Picropharmacolite Ca4Mg(AsO3OH)2(AsO4)2·11(H2O) P1 1

Other Rauenthalite Information

References:

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

See Also:

Links to other databases for Rauenthalite :
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 - WWW-MINCRYST 13 -École des Mines de Paris

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Rauenthalite

Ca3(AsO4)2·10(H2O)
Dana No: 40.3.11.1 Strunz No: VII/C.24-70
Locality:

Notes: