Kingsmountite Mineral Data

General Kingsmountite Information

Chemical Formula:

(Ca,Mn++)4(Fe++,Mn++)Al4(PO4)6(OH)4•12(H2O)

Composition:

Molecular Weight = 1,204.33 gm

Calcium 10.65 % Ca 14.90 % CaO

Magnesium 0.20 % Mg 0.33 % MgO

Manganese 6.39 % Mn 8.25 % MnO

Aluminum 8.74 % Al 16.51 % Al₂O₃

Iron 3.71 % Fe 3.58 % FeO / 1.33 % Fe₂O₃

Phosphorus 15.43 % P 35.36 % P₂O₅

Hydrogen 2.28 % H 20.34 % H₂O

Oxygen 52.61 % O

______ ______

100.00 % 100.60 % = TOTAL OXIDE

Empirical Formula:

Ca_3.2Mn²⁺_0.9Fe²⁺_0.6Mn²⁺_0.5Mg_0.1Al_3.9Fe³⁺_0.2(PO₄)₆(OH)₄ï¿½11.6(H₂O)

Environment:

Secondary mineral from the oxidation of primary phosphates be descending oxidizing ground water in complex granite pegmatites.

IMA Status:

Approved IMA 1979

Locality:

Foote Quarry, Kings Mountain, Cleveland County, North Carolina, USA. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Kingsmountite + Pronunciation

Kingsmountite Image

Images:

Kingsmountite

Comments: White, radial spray of kingsmountite crystals.
Location: Kings Mountain, Cleveland County, North Carolina, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Kingsmountite Crystallography

Axial Ratios:

a:b:c =0.41:1:0.2558

Cell Dimensions:

a = 10.029, b = 24.46, c = 6.258, Z = 2; beta = 91.16° V = 1,534.83 Den(Calc)= 2.61

Crystal System:

Monoclinic - Sphenoidal H-M Symbol (2) Space Group: C 2

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

By Intensity(I/I_o): 5.15(1), 2.624(0.6), 12.28(0.5),

Physical Properties of Kingsmountite

Color:

Light brown, Pearl white.

Density:

2.51

Diaphaneity:

Transparent

Habit:

Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Habit:

Spherical - Spherical, rounded aggregates.

Hardness:

2.5 - Finger Nail

Luster:

Pearly

Streak:

white

Optical Properties of Kingsmountite

Gladstone-Dale:

CI meas= -0.017 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.022 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2221,KPDmeas= 0.2309,KC= 0.2272
Ncalc = 1.57 - 1.59

Optical Data:

Biaxial (-), a=1.575, b=1.581, g=1.583, bire=0.0080, 2V(Calc)=58, 2V(Meas)=62.

Calculated Properties of Kingsmountite

Electron Density:

Bulk Density (Electron Density)=2.52 gm/cc
note: Specific Gravity of Kingsmountite =2.51 gm/cc.

Fermion Index:

Fermion Index = 0.0013879716
Boson Index = 0.9986120284

Photoelectric:

PE_{Kingsmountite}= 4.99 barns/electron
U=PE_{Kingsmountite} x rElectron Density= 12.59 barns/cc.

Radioactivity:

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

Kingsmountite Classification

Dana Class:

42.11.08.02 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.11)where (AB)4 (XO4)3 Zq ï¿½ x(H2O)

(42.11.08)Montgomeryite group

42.11.08.01 Montgomeryite Ca4MgAl4(PO4)6(OH)4•12(H2O) C 2/c 2/m

42.11.08.02 Kingsmountite (Ca,Mn)4(Fe,Mn)Al4(PO4)6(OH)4•12(H2O) C 2 2

42.11.08.03 Calcioferrite Ca4Fe(Fe,Al)4(PO4)6(OH)4•12(H2O) C 2 2

42.11.08.04 Zodacite Ca4MnFe4(PO4)6(OH)4•12(H2O) C 2/c,Cc Mono

42.11.08.05 Angastonite! CaMgAl2(PO4)2(OH)4?7H2O P1 1

Strunz Class:

08.DH.25 08 - PHOSPHATES, ARSENATES, VANADATES

08.D - Phosphates, etc

08.DH -With large and medium-sized cations, (OH, etc.):RO4 < 1:1

08.DH.25 Calcioferrite Ca4Fe(Fe,Al)4(PO4)6(OH)4•12(H2O) C 2 2

08.DH.25 Kingsmountite (Ca,Mn)4(Fe,Mn)Al4(PO4)6(OH)4•12(H2O) C 2 2

08.DH.25 Montgomeryite Ca4MgAl4(PO4)6(OH)4•12(H2O) C 2/c 2/m

08.DH.25 Zodacite Ca4MnFe4(PO4)6(OH)4•12(H2O) C 2/c,Cc Mono

Other Kingsmountite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Kingsmountite :
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 Kingsmountite Specimen Label here :

Kingsmountite

(Ca,Mn++)4(Fe++,Mn++)Al4(PO4)6(OH)4•12(H2O)
Dana No: 42.11.08.02 Strunz No: 08.DH.25
Locality:

Notes:

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