Ximengite Mineral Data

General Ximengite Information

Chemical Formula:

BiPO4

Composition:

Molecular Weight = 303.95 gm

Bismuth 68.75 % Bi 76.65 % Bi₂O₃

Phosphorus 10.19 % P 23.35 % P₂O₅

Oxygen 21.06 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Bi(PO₄)

Environment:

Alteration product of bismuthinite in a tin deposit.

IMA Status:

Approved IMA 1990

Locality:

Undefined locality in Ximeng Co., about 420 km southwest of Kunming, Yunnan Province, China. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Ximengite + Pronunciation

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Ximengite Crystallography

Axial Ratios:

a:c = 1:0.92689

Cell Dimensions:

a = 6.986, c = 6.4753, Z = 3; V = 273.68 Den(Calc)= 5.53

Crystal System:

Trigonal - TrapezohedralH-M Symbol (3 2) Space Group: P 3₁21

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

By Intensity(I/I_o): 3.0244(1), 4.4198(0.91), 3.493(0.88),

Crystal Structure:

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Mooney-Slater R C L , Zeitschrift fur Kristallographie , 117 (1962) p.371-385, Polymorphic forms of bismuth phosphate, Locality: synthetic

Physical Properties of Ximengite

Color:

Colorless.

Diaphaneity:

Transparent

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Vitreous - Greasy

Streak:

white

Optical Properties of Ximengite

Optical Data:

NCalc= 1.88 - from Gladstone-Dale relationship (KC = 0.16) where Ncalc=Dcalc*KC+1

Calculated Properties of Ximengite

Electron Density:

Bulk Density (Electron Density)=4.73 gm/cc
note: Specific Gravity of Ximengite =5.53 gm/cc.

Fermion Index:

Fermion Index = 0.0001017524
Boson Index = 0.9998982476

Photoelectric:

PE_Ximengite=1,294.07 barns/electron
U=PE_Ximengite x rElectron Density=6,121.42 barns/cc.

Radioactivity:

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

Ximengite Classification

Dana Class:

38.04.09.01 (38)Anhydrous Phosphates, etc

(38.04)A+ XO4

(38.04.09)Dana Group

38.04.09.01 Ximengite BiPO4 P 3₁21 3 2

Strunz Class:

08.AD.45 08 - PHOSPHATES, ARSENATES, VANADATES

08.A - Phosphates, etc. without additional anions, without H2O

08.AD -With only large cations

08.AD.45 Ximengite BiPO4 P 3₁21 3 2

Other Ximengite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Am.Min.,Vol.76,p1436,1991)

See Also:

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

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

Ximengite

BiPO4
Dana No: 38.04.09.01 Strunz No: 08.AD.45
Locality:

Notes: