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Ramikite-(Y)

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Formula:
Li4(Na,Ca)12Y6Zr6(PO4)12(CO3)4O4[(OH),F]4
System:
Triclinic
Colour:
Yellowish-white
Hardness:
3
Name:
Named in honor of Mr. Robert A.J. Ramik (b. 1951), a thermoanalytical technician and mineralogist in the Department of Natural History at the Royal Ontario Museum, Toronto, Canada.
Earlier designated as UK 108.

Classification of Ramikite-(Y)

Approved 2009
43.4.15.

43 : COMPOUND PHOSPHATES, ETC.
4 : Anhydrous Compound Phosphates, etc·, Containing Hydroxyl or Halogen
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http://www.mindat.org/min-39555.html
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Type Occurrence of Ramikite-(Y)

General Appearance of Type Material:
Epitactic-like, euhedral crystals (pseudocubes) of peatite-(Y) and Ramikite-(Y) range from 0.1 to 1 mm in size (average: 0.2 mm). Core = Ramikite-(Y) and peatite-(Y) as thin (< 50 um) pale pink rims.
Geological Setting of Type Material:
Late-stage product in the core of the alkaline Poudrette Pegmatite

Physical Properties of Ramikite-(Y)

Vitreous, Dull
Colour:
Yellowish-white
Streak:
White
Hardness (Mohs):
3
Hardness Data:
Estimated
Cleavage:
Poor/Indistinct
possible weak to poor {100}, {010}, and {001} cleavages.
Fracture:
Splintery
Density:
3.60(1) g/cm3 (Calculated)

Crystallography of Ramikite-(Y)

Crystal System:
Triclinic
Class (H-M):
1 - Pedial
Space Group:
P1
Cell Parameters:
a = 10.9977(6) Å, b = 10.9985(6) Å, c = 10.9966(6) Å
α = 90.075(4)°, β = 89.984(4)°, γ = 89.969(4)°
Ratio:
a:b:c = 1 : 1 : 1
Morphology:
Common forms: pedion {100}, {001-}, {010}, {01-0}, {001}, and {001-}.

Epitaxial Relationships of Ramikite-(Y)

Epitaxial Minerals:
Peatite-(Y)Li4Na12Y12(PO4)12(CO3)4(F,OH)8
Epitaxy Comments:
As crystals (pseudocubes) with yellowish-white cores of ramikite-(Y) and thin (< 50 um) pale pink rims of peatite-(Y).
X-Ray Powder Diffraction Data:
d-spacingIntensity
11.04 (76)
7.80 (79)
6.36 (75)
3.89 (100)
3.48 (68)
2.94 (98)
2.59 (98)
2.117 (65)

Chemical Properties of Ramikite-(Y)

Formula:
Li4(Na,Ca)12Y6Zr6(PO4)12(CO3)4O4[(OH),F]4
Essential elements:
All elements listed in formula:
Analytical Data:
Average of 22 analyses. Empirical Formula: Li4(Na10.79Ca1.21)Σ12(Y4.34Ca0.99Dy0.18Er0.18Yb0.09La0.02Ce0.02Nd0.01)Σ5.83(Zr5.65Hf0.10Th0.06)Σ5.81 [(P0.98Al0.01)Σ0.99 O4]12 (CO3)4O4[(OH)3.03F0.97]Σ4.00
Li2O(2.01) (calc.)
Na2O(11.25) (10.32–13.34)
CaO(4.15) (4.01–4.27)
Y2O3(16.48) (14.88–18.25)
La2O3(0.11) (b.d.−0.48)
Ce2O3(0.10) (b.d.−0.40)
Nd2O3(0.08) (b.d.−031)
Dy2O3(1.11) (0.96–1.23)
Er2O3(1.18) (1.01–1.36)
Yb2O3(0.57) (0.46–0.68)
ZrO2(23.40) (22.66–24.70)
ThO2(0.49) (b.d.−0.70)
HfO2(0.69) (0.48–0.92)
Al2O3(0.14) (0.09–0.22)
P2O5(28.10) (27.47–28.58)
F(0.62) (0.24–0.90)
CO2(5.92) (calc.)
H2O(0.92) (calc.)
O = F −0.26
total 97.06, 

Other Names for Ramikite-(Y)

Name in Other Languages:

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Ramikite-(Y)

Reference List:
McDonald, A.M., Back, M.E., Gault, R.A., Horváth, L. (2013): Peatite-(Y) and ramikite-(Y), two new Na-Li-Y{+/-}Zr phosphate-carbonate minerals from the Poudrette pegmatite, Mont Saint-Hilaire, Québec. Canadian Mineralogist, 51, 569-596.

Internet Links for Ramikite-(Y)

Specimens:
The following Ramikite-(Y) specimens are currently listed for sale on minfind.com.

Localities for Ramikite-(Y)

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Canada (TL)
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
McDonald, A.M., Back, M.E., Gault, R.A., Horváth, L. (2013): Peatite-(Y) and ramikite-(Y), two new Na-Li-Y{+/-}Zr phosphate-carbonate minerals from the Poudrette pegmatite, Mont Saint-Hilaire, Québec. Canadian Mineralogist, 51, 569-596.
Mineral and/or Locality  
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