Hureaulite Mineral Data

Hureaulite Mineral Data +

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General Hureaulite Information

Chemical Formula:

Mn5(PO3OH)2(PO4)2·4(H2O)

Composition:

Molecular Weight = 728.65 gm

Manganese 37.70 % Mn 48.68 % MnO

Phosphorus 17.00 % P 38.96 % P₂O₅

Hydrogen 1.38 % H 12.36 % H₂O

Oxygen 43.92 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺₅(PO₃OH)₂(PO₄)₂·4(H₂O)

Environment:

Secondary mineral in weathered triphylite.

IMA Status:

Valid Species (Pre-IMA) 1826

Locality:

Hureaux in St. Silvestre and Vilate near Chanteloube, N of Limoges, Haute Vienne, France. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

ICSD 34744

PDF 34-146

Hureaulite Image

Images:

Hureaulite

Comments: Pink crystals of hureaulite on matrix.
Location: Tip Top mine, Custer, Custer County, South Dakota, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Images:

Hureaulite Tavorite

Comments: Lime green tavorite micro crystals with pink, gemmy hureaulite.
Location: Tip Top mine, Custer Co., South Dakota, United States. Scale: Picture size 1.0 cm.
© Tom Loomis / Dakota Matrix

Hureaulite Crystallography

Axial Ratios:

a:b:c =1.9323:1:1.04

Cell Dimensions:

a = 17.618, b = 9.1172, c = 9.482, Z = 4; beta = 96.58° V = 1,513.03 Den(Calc)= 3.20

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c

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

By Intensity(I/I_o): 3.152(1), 8.09(0.7), 2.992(0.65),

Forms:

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Crystal Structure:

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Moore P B , Araki T , American Mineralogist , 58 (1973) p.302-307, Hureaulite, Mn5(H2O)4[PO3(OH)]2[PO4]2: Its atomic arrangement

Physical Properties of Hureaulite

Cleavage:

[???] Distinct

Color:

Red, White, Grayish white, Yellowish white, Reddish white.

Density:

3.18

Diaphaniety:

Transparent to Translucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Compact - Occurs as a compact mass.

Habit:

Fibrous - Crystals made up of fibers.

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Hardness:

5 - Apatite

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Greasy

Streak:

white

Optical Properties of Hureaulite

Gladstone-Dale:

CI meas= 0.018 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.024 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2043,KPDmeas= 0.2056,KC= 0.2092

Optical Data:

Biaxial (-), a=1.647, b=1.654, g=1.66, bire=0.0130, 2V(Calc)=84, 2V(Meas)=75. Dispersion r < v very strong.

Pleochroism (x):

coloress or colorless.

Pleochroism (y):

yellow or pale rose.

Pleochroism (z):

reddish yellow or reddish brown.

Calculated Properties of Hureaulite

Electron Density:

r_electron=3.10 gm/cc
note: r_Hureaulite=3.18 gm/cc.

Fermion Index

Fermion Index = 0.00021
Boson Index = 0.99979

Photoelectric:

PE_Hureaulite= 10.41 barns/electron
U=PE_Hureaulite x r_electron= 32.27 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Hureaulite is Not Radioactive

Hureaulite Classification

Dana Class:

39.2.1.1 (39)Hydrated Acid Phosphates, etc

(39.2)H2 (AB)5 (XO4)4 · x(H2O)

(39.2.1)Dana Group

39.2.1.1 Hureaulite Mn5(PO3OH)2(PO4)2·4(H2O) C 2/c 2/m

39.2.1.2 Sainfeldite Ca5(AsO3OH)2(AsO4)2·4(H2O) C 2/c 2/m

39.2.1.3 Villyaellenite Mn5(AsO3OH)2(AsO4)2·4(H2O) C 2/c 2/m

Strunz Class:

VII/C.04-10 VII - Phosphates, Arsenates and Vanadates

VII/C - Water-bearing phosphates without unfamiliar anions. cations of medium and small size: Be and Mn, Fe, Cu, Zn, Mg

VII/C.04 - Hureaulite - Villyaellenite series

VII/C.04-10 Hureaulite Mn5(PO3OH)2(PO4)2·4(H2O) C 2/c 2/m

VII/C.04-20 Sainfeldite Ca5(AsO3OH)2(AsO4)2·4(H2O) C 2/c 2/m

VII/C.04-30 Villyaellenite Mn5(AsO3OH)2(AsO4)2·4(H2O) C 2/c 2/m

Other Hureaulite Information

References:

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

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Hureaulite

Mn5(PO3OH)2(PO4)2·4(H2O)
Dana No: 39.2.1.1 Strunz No: VII/C.04-10
Locality:

Notes: