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Tiptopite Mineral Data

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General Tiptopite Information

Help on Chemical  Formula: Chemical Formula: K2(Na,Ca)2Li3Be6(PO4)6(OH)2•(H2O)
Help on Composition: Composition: Molecular Weight = 829.47 gm
   Potassium    9.43 %  K    11.36 % K2O
   Sodium       4.16 %  Na    5.60 % Na2O
   Lithium      2.51 %  Li    5.40 % Li2O
   Calcium      2.42 %  Ca    3.38 % CaO
   Beryllium    6.52 %  Be   18.09 % BeO
   Phosphorus  22.40 %  P    51.34 % P2O5
   Hydrogen     0.49 %  H     4.34 % H2O
   Oxygen      52.08 %  O
              ______        ______ 
              100.00 %       99.52 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K2Na1.5Ca0.5Li3Be6(PO4)6(OH)2•(H2O)
Help on Environment: Environment: Pegmatite mineral.
Help on IMA Status: IMA Status: Approved IMA 1985
Help on Locality: Locality: Tip Top mine, Custer, Custer County, South Dakota, USA Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Tiptopite + Pronunciation Say TIPTOPITE
Help on Synonym: Synonym: ICSD 202308
  PDF 38-374

Tiptopite Image

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  Tiptopite   Montgomeryite

Comments: Clear, acicular crystals of tiptopite with red montgomeryite.
Location: Tip Top mine, Custer, Custer County, South Dakota, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

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  Tiptopite   Englishite   Montgomeryite

Comments: Red montgomeryite lath-like crystals to 1mm in 2mm rosettes associated with clear, acicular sprays of tiptopite to 0.75mm and white cottonball-like crystals of englishite to 0.2mm.
Location: Tip Top mine, Custer Co., South Dakota, USA. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Tiptopite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.40257
Help on Cell Dimensions: Cell Dimensions: a = 11.655, c = 4.692, Z = 1; V = 551.97 Den(Calc)= 2.50
Help on Crystal System: Crystal System: Hexagonal - Pyramidal H-M Symbol (6) Space Group: P 63
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.966(1), 2.525(0.9), 2.348(0.7),

Physical Properties of Tiptopite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless.
Help on Density: Density: 2.65
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Tiptopite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.003 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.064 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.222,KPDmeas= 0.2094,KC= 0.2087
Ncalc = 1.52 - 1.55
Help on Optical Data: Optical Data: Uniaxial (+), w=1.551, e=1.559, bire=0.0080.

Calculated Properties of Tiptopite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.60 gm/cc
note: Specific Gravity of Tiptopite =2.65 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.06
Boson Index = 0.94
Help on Photoelectric: Photoelectric: PETiptopite = 2.47 barns/electron
U=PETiptopite x relectron= 6.44 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 133.63 (Gamma Ray American Petroleum Institute Units)
Concentration of Tiptopite per GRapi unit = 0.75 (%)

Estimated Radioactivity from Tiptopite - barely detectable


Tiptopite Classification

Help on  Dana Class: Dana Class: (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.06)where (AB)2 (XO4) Zq � x(H2O)
  (42.06.11)Dana Group Tiptopite K2(Na,Ca)2Li3Be6(PO4)6(OH)2•(H2O) P 63 6
Help on  Strunz Class: Strunz Class: 08.DA.25 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DA -With small (and occasionally larger) cations
08.DA.25 Tiptopite K2(Na,Ca)2Li3Be6(PO4)6(OH)2•(H2O) P 63 6

Other Tiptopite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Tiptopite :
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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Dana No: Strunz No: 08.DA.25





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