Triplite Mineral Data
General Triplite Information
Chemical Formula:
(Mn,Fe++,Mg,Ca)2(PO4)(F,OH)
Composition:
Molecular Weight = 211.64 gm
Calcium 3.79 % Ca 5.30 % CaO
Magnesium 3.45 % Mg 5.71 % MgO
Manganese 25.96 % Mn 33.52 % MnO
Iron 13.19 % Fe 16.97 % FeO
Phosphorus 14.64 % P 33.53 % P2 O5
Hydrogen 0.12 % H 1.06 % H2 O
Oxygen 32.13 % O
Fluorine 6.73 % F 6.73 % F
- %
F -2.83 % -O=F2
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Mn2+ Fe2+ 0.5 Mg0.3 Ca0.2 (PO4 )F0.75 (OH)0.25
IMA Status:
Valid Species (Pre-IMA) 1813
Locality:
Link to MinDat.org Location Data.
Name Origin:
From the Greek triplos - "triplex."
Name Pronunciation:
Triplite
Synonym:
ICSD 4428
PDF 25-1080
Triplite Image
Images:
Triplite Crystallography
Axial Ratios:
a:b:c =1.8489:1:1.5162
Cell Dimensions:
a = 12.085, b = 6.536, c = 9.91, Z = 8; beta = 105.633° V = 753.81 Den(Calc)= 3.73
Crystal System:
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: I2/m
X Ray Diffraction:
By Intensity(I/Io ): 2.87(1), 3.05(0.9), 3.26(0.7),
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Physical Properties of Triplite
Cleavage:
{010} Good, {100} Distinct
Color:
Brown, Dark brown, Salmon pink, Brownish black, Black.
Density:
3.44 - 3.9, Average = 3.67
Diaphaneity:
Subtranslucent to opaque
Fracture:
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Habit:
Massive - Granular - Common texture observed in granite and other igneous rock.
Hardness:
5 - Apatite
Luminescence:
Non-fluorescent.
Luster:
Resinous - Greasy
Streak:
yellowish gray
Optical Properties of Triplite
Gladstone-Dale:
CI meas = 0.042 (Good) - where the CI = (1-KPDmeas /KC ) CI calc = 0.057 (Good) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.1778,KPDmeas = 0.1807,KC = 0.1886 Ncalc = 1.65 - 1.74
Optical Data:
Biaxial (+), a=1.65, b=1.66, g=1.68, bire=0.0300, 2V(Calc)=72, 2V(Meas)=70-90. Dispersion relatively strong.
Calculated Properties of Triplite
Electron Density:
Bulk Density (Electron Density)=3.52 gm/cc note: Specific Gravity of Triplite =3.67 gm/cc.
Fermion Index:
Fermion Index = 0.0064478437 Boson Index = 0.9935521563
Photoelectric:
PETriplite = 11.97 barns/electronU=PETriplite x r Electron Density= 42.18 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Triplite is Not Radioactive
Triplite Classification
Dana Class:
41.06.01.02 (41) Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
(41.06) where (A)2 (XO4) Zq
(41.06.01) Zwieselite Group
41.06.01.01 Zwieselite (Fe,Mn)2(PO4)F I2/a 2/m
41.06.01.02 Triplite (Mn,Fe,Mg,Ca)2(PO4)(F,OH) I2/m 2/m
41.06.01.03 Magniotriplite ? (Mg,Fe,Mn)2(PO4)F P 21 /a 2/m
Strunz Class:
08.BB.10 08 - PHOSPHATES, ARSENATES, VANADATES
08.B - Phosphates, etc. with Additional Anions, without H2O
08.BB -With only medium-sized cations, (OH, etc.):RO4 � 1:1
08.BB.10 Magniotriplite ? (Mg,Fe,Mn)2(PO4)F P 21 /a 2/m
08.BB.10 Hydroxylwagnerite ! Mg2(PO4)(OH) P 21 /c 2/m
08.BB.10 Triplite (Mn,Fe,Mg,Ca)2(PO4)(F,OH) I2/m 2/m
08.BB.10 Zwieselite (Fe,Mn)2(PO4)F I2/a 2/m
Other Triplite Information
References:
NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
See Also:
Links to other databases for Triplite :
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
15 - Scandinavian mineral gallery
16 - WWW-MINCRYST
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Triplite
(Mn,Fe++,Mg,Ca)2(PO4)(F,OH)
Dana No: 41.06.01.02 Strunz No: 08.BB.10
Locality:
Notes:
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