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Sanidine
Sanidine

Anorthoclase
Anorthoclase



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Anorthoclase

Sanidine and Anorthoclase

1 Physical
1.1 Mohs Hardness
6
6
1.2 Luster
Vitreous Pearly
Vitreous (Glassy)
1.3 Cleavage
{001} perfect, {010} good
Perfect on [001], other partings
1.4 Fracture
Uneven Flat surfaces (not cleavage) fractured in an uneven pattern.
Not Available
1.5 Streak
white
white
1.6 Bulk Density
Osmium
2.51
Rank: N/A (Overall)
2.56
Rank: N/A (Overall)
Kurilite
1.7 Tenacity
Brittle
Brittle
2 Chemical
2.1 Formula
2.1.1 Chemical Formula
(K,Na)(Si,Al)4O8
(Na,K)AlSi3O8
2.1.2 Empirical Formula
K0.75Na0.25AlSi3O8
Na0.75K0.25AlSi3O8
2.2 Crystal Properties
2.2.1 Crystal System
Monoclinic
Triclinic
2.2.2 Space group
Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/m
Triclinic Pinacoidal H-M Symbol ( 1 ) Space Group: C 1
2.2.3 Crystal Habit
Tabular crystals, may be acicular
Short prismatic crystals; tabular, rhombic, flattened along [010]
2.2.4 Crystal Class
Prismatic (2/m)
Pinacoidal ( 1 )
2.2.5 Twinning
Carlsbad twinning common
Polysynthetic twinning produces a grid pattern on [100]
2.3 Molecular Weight
Proudite
274.30
Rank: N/A (Overall)
266.25
Rank: N/A (Overall)
Diamond
3 Atomic
3.1 Axial Ratios
a:b:c =0.6588:1:0.5534
a:b:c =0.6406:1:0.5546
3.2 Fermion Index
Maldonite
0.01
Rank: 37 (Overall)
0.01
Rank: 37 (Overall)
Algodonite
3.3 Boson Index
Algodonite
0.99
Rank: N/A (Overall)
0.99
Rank: N/A (Overall)
Urea
3.4 Cell Dimensions
3.4.1 a
Mesolite
8.56
Rank: N/A (Overall)
8.20
Rank: N/A (Overall)
Graphite
3.4.2 b
Liveingite
13.00
Rank: N/A (Overall)
12.80
Rank: N/A (Overall)
Tantalcarbide
3.4.3 c
Taranakite
7.19
Rank: N/A (Overall)
7.10
Rank: N/A (Overall)
Tiettaite
3.4.4 alpha
Nefedovite
Not Available
Rank: N/A (Overall)
90.00 °
Rank: N/A (Overall)
Schneiderhohnite
3.4.5 beta
Catapleiite
116.02 °
Rank: N/A (Overall)
116.00 °
Rank: N/A (Overall)
Harmotome
3.4.6 gamma
Rhonite
Not Available
Rank: N/A (Overall)
90.00 °
Rank: N/A (Overall)
Hemihedrite
4 Optical
4.1 Photoelectric
Natronambulite
2.57 barns/electron
Rank: N/A (Overall)
1.98 barns/electron
Rank: N/A (Overall)
Hartite
4.2 Radioactivity
No Common Minerals Minerals has it !
No Common Minerals Minerals has it !
4.2.1 GRapi
Melanocerite Ce
152.94
Rank: N/A (Overall)
52.50
Rank: N/A (Overall)
Abelsonite
4.3 By Intensity
3.26(1), 3.22(0.9), 3.27(0.75
3.211(1), 3.243(0.9), 4.106(0.16
4.4 Specific Gravity
Osmium
2.53
Rank: N/A (Overall)
2.59
Rank: N/A (Overall)
Kurilite
4.5 Diaphaneity
Transparent to Translucent
Transparent
4.6 Luminescence
Non-fluorescent.
Not Available
4.7 Birefringence
0
0
4.8 Pleochroism
colorless.
colorless.
5 Classification
5.1 Category
Feldspar
Feldspar
5.2 IMA Status
Valid Species (Pre-IMA) 1808
Valid Species (Pre-IMA) 1885
5.3 Dana Class
76.01.01.02
76.01.01.06
5.4 Strunz Class
09.FA.30
09.FA.30
6 Facts
6.1 Origin
Acid volcanic rocks.
In high-temperature sodic volcanic and hypabyssal rocks.
6.2 Locality
Common world wide occurrences. Link to  MinDat.org Location Data.
Rather abundant worldwide. Some localities for well-characterized material include: on Pantelleria and Ustica Islands, Italy. At Larvik, Norway. From Berkum, North Rhine-Westphalia, Ge Link to  MinDat.org Location Data.
6.3 Name Origin
From the Greek sanis little plate and idos to see.
From the Greek for oblique and fracture, descriptive of the cleavage
6.4 Color
White, Colorless, White, Not Available, Not Available, Reddish white., Colorless to white
White, Yellow, Red, Colorless, Not Available, Not Available, Red, Green, Colorless, Green, Not Available, Gray pink, Not Available
6.5 Name Synonym
Not Available
ICSD 31180
6.6 Uses
Not Available
Not Available

Sanidine and Anorthoclase Information

Minerals are solid substances, occurring naturally. Minerals are not organic compounds as their origins are inorganic. Interestingly, the process of formation of minerals do result from organic processes. The way in which the minerals are formed affects the Sanidine and Anorthoclase. The appearance of a mineral is greatly influenced during its formation. Sanidine and Anorthoclase information will help you understand how these minerals are found in nature. Here you can know all about it. Sanidine mineral belongs to Feldspar and Anorthoclase belongs to Feldspar. It is also important to know the IMA status of a mineral, for the first mineral IMA status is Valid Species (Pre-IMA) 1808 and for second mineral it is Valid Species (Pre-IMA) 1885. Another important aspect is the minerals strength or hardness, Sanidine has Mohs Hardness between 6 while Anorthoclase has a hardness of 6.

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