Leucophoenicite Mineral Data (original) (raw)

General Leucophoenicite Information

Help on Chemical Formula: Chemical Formula:

Mn7(SiO4)3(OH)2

Help on Composition: Composition:

Molecular Weight = 694.83 gm

Manganese 55.35 % Mn 71.47 % MnO

Silicon 12.13 % Si 25.94 % SiO2

Hydrogen 0.29 % H 2.59 % H2O

Oxygen 32.24 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

Mn2+7(SiO4)3(OH)2

Help on IMA Status: IMA Status:

Valid Species (Pre-IMA) 1899

Help on Locality: Locality:

Franklin, Sussex Co., New Jersey. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

From the Greek leukos, "pale" and foinis, "red purple", in allusion to its color

Help on Name Pronunciation: Name Pronunciation:

Leucophoenicite Say LEUCOPHOENICITE

Help on Synonym: Synonym:

ICSD 15176

PDF 22-1168

Leucophoenicite Image

Click Here for Larger Leucophoenicite Image in a New Browser Window Images:

Click Here for Larger Leucophoenicite Image Leucophoenicite Comments: Cinnamon brown crystals of leucophoenicite over deep reddish pink crystals of rhodochrosite. Location: N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa.Scale: 8 x 4.2 cm. © John Veevaert

Leucophoenicite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =2.2465:1:2.3464

Help on Cell Dimensions: Cell Dimensions:

a = 10.842, b = 4.826, c = 11.324, Z = 2; beta = 103.93° V = 575.09 Den(Calc)= 4.01

Help on Crystal System: Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 1.806(1), 2.877(0.9), 2.684(0.8),

Click Here for Large Leucophoenicite Structure Window Crystal Structure:

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| | Moore P B , American Mineralogist , 55 (1970) p.1146-1166, Edge-sharing silicate tetrahedra in the crystal structure of leucophoenicite View Additional jPOWD Structure files for Leucophoenicite [1] | | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of Leucophoenicite

Help on Cleavage: Cleavage:

{001} Indistinct

Help on Color: Color:

Brown, Brown, Violet red, Light red, Dark pink.

Help on Density: Density:

3.8

Help on Diaphaneity: Diaphaneity:

Transparent to translucent

Help on Fracture: Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Help on Habit: Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Help on Habit: Habit:

Striated - Parallel lines on crystal surface or cleavage face.

Help on Hardness: Hardness:

5.5-6 - Knife Blade-Orthoclase

Help on Luminescence: Luminescence:

Non-fluorescent.

Help on Luster: Luster:

Vitreous (Glassy)

Help on Magnetism: Magnetism:

Nonmagnetic

Optical Properties of Leucophoenicite

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= 0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.059 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1915,KPDmeas= 0.2021,KC= 0.2036
Ncalc = 1.77 - 1.82

Help on Optical Data: Optical Data:

Biaxial (-), a=1.751, b=1.771, g=1.782, bire=0.0310

Calculated Properties of Leucophoenicite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=3.62 gm/cc
note: Specific Gravity of Leucophoenicite =3.80 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.0058181066
Boson Index = 0.9941818934

Help on Photoelectric: Photoelectric:

PELeucophoenicite = 14.82 barns/electron
U=PELeucophoenicite x rElectron Density= 53.66 barns/cc.

Help on Radioactivity: Radioactivity:

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

Leucophoenicite Classification

Help on Dana Class: Dana Class:

52.03.02c.02 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O

(52.03)with cations in [6] coordination only

(52.03.02c)Humite group (Humite series)

52.03.02c.01 Humite (Mg,Fe)7(SiO4)3(F,OH)2 P nma 2/m 2/m 2/m

52.03.02c.02 Leucophoenicite Mn7(SiO4)3(OH)2 P 21/a 2/m

52.03.02c.03 Manganhumite (Mn,Mg)7(SiO4)3(OH)2 Pbnm 2/m 2/m 2/m

52.03.02c.04 Chegemite! Ca7(SiO4)3(OH)2 Pbnm 2/m 2/m 2/m

Help on Strunz Class: Strunz Class:

09.AF.60 09 - SILICATES (Germanates)

09.A - Nesosilicates

09.AF -Nesosilicates with additional anions;

09.AF.60 Leucophoenicite Mn7(SiO4)3(OH)2 P 21/a 2/m

Other Leucophoenicite Information

Help on References: References:

NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)

Help on See Also: See Also:

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

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Ask about Leucophoenicite here :
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Print or Cut-and-Paste your Leucophoenicite Specimen Label here :

Leucophoenicite

Mn7(SiO4)3(OH)2
Dana No: 52.03.02c.02 Strunz No: 09.AF.60
Locality:

Notes: