Hureaulite Mineral Data

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.

Name Pronunciation:

Hureaulite + Pronunciation

Synonym:

Ca-hureaulite - Ca-bearing hureaulite

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:

Tavorite Hureaulite

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 - Prismatic H-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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Forms: ( 1 1 1) ( 5 1 2) ( 2 0 1) ( 1 1 0) ( 1 0 0) ( 0 0 1)

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Physical Properties of Hureaulite

Cleavage:

{???} Distinct

Color:

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

Density:

3.18

Diaphaneity:

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
Ncalc = 1.67

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.

Calculated Properties of Hureaulite

Electron Density:

Bulk Density (Electron Density)=3.10 gm/cc
note: Specific Gravity of Hureaulite =3.18 gm/cc.

Fermion Index:

Fermion Index = 0.000212867
Boson Index = 0.999787133

Photoelectric:

PE_Hureaulite= 10.41 barns/electron
U=PE_Hureaulite x rElectron Density= 32.27 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hureaulite is Not Radioactive

Hureaulite Classification

Dana Class:

39.02.01.01 (39)Hydrated Acid Phosphates, etc

(39.02)H2 (AB)5 (XO4)4 ï¿½ x(H2O)

(39.02.01)Hureaulite Group

39.02.01.01 Hureaulite Mn5(PO3OH)2(PO4)2•4(H2O) C 2/c 2/m

39.02.01.02 Sainfeldite Ca5(AsO3OH)2(AsO4)2•4(H2O) C 2/c 2/m

39.02.01.03 Villyaellenite Mn5(AsO3OH)2(AsO4)2•4(H2O) C 2/c 2/m

39.02.01.04 IMA2008-047! Cd3Zn2(AsO3OH)2(AsO4)24?H2O C 2/c 2/m

39.02.01.05 IMA2008-066! Mn5(H2O)4(AsO3OH)2(AsO4)2 C 2/c 2/m

Strunz Class:

08.CB.10 08 - PHOSPHATES, ARSENATES, VANADATES

08.C - Phosphates without Additional Anions, with H2O

08.CB -With only medium-sized cations, RO4:H2O = 1:1

08.CB.10 Hureaulite Mn5(PO3OH)2(PO4)2•4(H2O) C 2/c 2/m

08.CB.10 Sainfeldite Ca5(AsO3OH)2(AsO4)2•4(H2O) C 2/c 2/m

08.CB.10 IMA2008-066! Mn5(H2O)4(AsO3OH)2(AsO4)2 C 2/c 2/m

08.CB.10 Villyaellenite Mn5(AsO3OH)2(AsO4)2•4(H2O) C 2/c 2/m

08.CB.10 IMA2008-047! Cd3Zn2(AsO3OH)2(AsO4)24?H2O C 2/c 2/m

Other Hureaulite Information

See Also:

Links to other databases for Hureaulite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - WWW-MINCRYST

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Hureaulite

Mn5(PO3OH)2(PO4)2•4(H2O)
Dana No: 39.02.01.01 Strunz No: 08.CB.10
Locality:

Notes:

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