Maufite Mineral Data

General Maufite Information

Chemical Formula:

(Mg,Ni)Al4Si3O13•4(H2O) (?)

Composition:

Molecular Weight = 505.14 gm

Magnesium 3.61 % Mg 5.98 % MgO

Aluminum 21.37 % Al 40.37 % Al₂O₃

Silicon 16.68 % Si 35.68 % SiO₂

Nickel 2.90 % Ni 3.70 % NiO

Hydrogen 1.60 % H 14.27 % H₂O

Oxygen 53.84 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mg_0.75Ni_0.25Al₄Si₃O₁₃•4(H₂O)

Environment:

As a seam in serpentine adjacent to a diabase dike. Maufite (1930) is an inadequately described species now considered to be interstratified clinochlore-lizardite.

IMA Status:

Discredited IMA 2006 - Valid Species (Pre-IMA) 1930

Locality:

On Ruorka Ranch, 2.4 km northeast of the Umvukwe geodetic beacon, Mazoe district, Umvukwe Mountains, Zimbabwe. Link to MinDat.org Location Data.

Name Origin:

Named for Herbert Brantwood Maufe (1879-1976), director of the Geological Service of Rhodesia

Name Pronunciation:

Maufite

Maufite Crystallography

Crystal System:

Monoclinic Space Group: Mono ?

Physical Properties of Maufite

Color:

Emerald green.

Density:

2.27

Diaphaneity:

Translucent

Fracture:

Regular - Flat surfaces (not cleavage) fractured in a regular pattern.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Fibrous - Crystals made up of fibers.

Habit:

Wheat Sheaf - Bundle shaped aggregates resembling wheat sheafs after hand reaping wheat.

Hardness:

3 - Calcite

Streak:

greenish white

Optical Properties of Maufite

Optical Data:

NCalc= 1.51 - from Gladstone-Dale relationship (KC = 0.2248) where Ncalc=Dmeas*KC+1

Calculated Properties of Maufite

Electron Density:

Bulk Density (Electron Density)=2.28 gm/cc
note: Specific Gravity of Maufite =2.27 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Maufite= 2.50 barns/electron
U=PE_Maufite x rElectron Density= 5.71 barns/cc.

Radioactivity:

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

Maufite Classification

Dana Class:

78.07.13.01 (78)Unclassified silicates

(78.07)wholly unclassified silicates

(78.07.13)Dana Group

78.07.13.01 Maufite? (Mg,Ni)Al4Si3O13•4(H2O)(?) Mono ? Mono

Strunz Class:

09.ED.15 09 - SILICATES (Germanates)

09.E - Phyllosilicates

09.ED -Phyllosilicates with kaolinite layers

09.ED.15 Clinochrysotile? Mg3Si2O5(OH)4 Cc, C 2/m Mono

09.ED.15 Berthierine (Fe,Fe,Al,Mg)2-3(Si,Al)2O5(OH)4 Cm m

09.ED.15 Brindleyite (Ni,Mg,Fe)2Al(SiAl)O5(OH)4 C 2 2

09.ED.15 Amesite Mg2Al(SiAl)O5(OH)4 C1 1

09.ED.15 Antigorite (Mg,Fe)3Si2O5(OH)4 Cm m

09.ED.15 Caryopilite (Mn,Mg,Zn,Fe)3(Si,As)2O510(OH,Cl)4 Cm or C 2/m Mono

09.ED.15 Fraipontite (Zn,Al)3(Si,Al)2O5(OH)4 Cm m

09.ED.15 Cronstedtite Fe2Fe(SiFe)O5(OH)4 P 3₁m 3m

09.ED.15 Chrysotile Mg3Si2O5(OH)4 A2/m 2/m

09.ED.15 Nepouite Ni3Si2O5(OH)4 Ccm21 mm2

09.ED.15 Greenalite (Fe,Fe)2-3Si2O5(OH)4 Unk Mono

09.ED.15 Kellyite (Mn,Mg,Al)3(Si,Al)2O5(OH)4 P 6₃ 6

09.ED.15 Maufite? (Mg,Ni)Al4Si3O13•4(H2O)(?) Mono ? Mono

09.ED.15 Lizardite Mg3Si2O5(OH)4 P1 1

09.ED.15 Orthochrysotile? Mg3Si2O5(OH)4 Unk Ortho

09.ED.15 Manandonite Li2Al4[(Si2AlB)O10](OH)8 C1 1

09.ED.15 Pecoraite Ni3Si2O5(OH)4 C 2/m 2/m

09.ED.15 Parachrysotile? Mg3Si2O5(OH)4 Unk Ortho

Other Maufite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2)

See Also:

Links to other databases for Maufite :
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 (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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

Maufite

(Mg,Ni)Al4Si3O13•4(H2O) (?)
Dana No: 78.07.13.01 Strunz No: 09.ED.15
Locality:

Notes:

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